2 * Copyright (c) 2018 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
15 #ifndef __VIRTIO_VHOST_USER_INLINE_H__
16 #define __VIRTIO_VHOST_USER_INLINE_H__
17 /* vhost-user inline functions */
18 #include <vppinfra/elog.h>
20 static_always_inline void *
21 map_guest_mem (vhost_user_intf_t * vui, uword addr, u32 * hint)
24 if (PREDICT_TRUE ((vui->regions[i].guest_phys_addr <= addr) &&
25 ((vui->regions[i].guest_phys_addr +
26 vui->regions[i].memory_size) > addr)))
28 return (void *) (vui->region_mmap_addr[i] + addr -
29 vui->regions[i].guest_phys_addr);
32 __m128i rl, rh, al, ah, r;
33 al = _mm_set1_epi64x (addr + 1);
34 ah = _mm_set1_epi64x (addr);
36 rl = _mm_loadu_si128 ((__m128i *) & vui->region_guest_addr_lo[0]);
37 rl = _mm_cmpgt_epi64 (al, rl);
38 rh = _mm_loadu_si128 ((__m128i *) & vui->region_guest_addr_hi[0]);
39 rh = _mm_cmpgt_epi64 (rh, ah);
40 r = _mm_and_si128 (rl, rh);
42 rl = _mm_loadu_si128 ((__m128i *) & vui->region_guest_addr_lo[2]);
43 rl = _mm_cmpgt_epi64 (al, rl);
44 rh = _mm_loadu_si128 ((__m128i *) & vui->region_guest_addr_hi[2]);
45 rh = _mm_cmpgt_epi64 (rh, ah);
46 r = _mm_blend_epi16 (r, _mm_and_si128 (rl, rh), 0x22);
48 rl = _mm_loadu_si128 ((__m128i *) & vui->region_guest_addr_lo[4]);
49 rl = _mm_cmpgt_epi64 (al, rl);
50 rh = _mm_loadu_si128 ((__m128i *) & vui->region_guest_addr_hi[4]);
51 rh = _mm_cmpgt_epi64 (rh, ah);
52 r = _mm_blend_epi16 (r, _mm_and_si128 (rl, rh), 0x44);
54 rl = _mm_loadu_si128 ((__m128i *) & vui->region_guest_addr_lo[6]);
55 rl = _mm_cmpgt_epi64 (al, rl);
56 rh = _mm_loadu_si128 ((__m128i *) & vui->region_guest_addr_hi[6]);
57 rh = _mm_cmpgt_epi64 (rh, ah);
58 r = _mm_blend_epi16 (r, _mm_and_si128 (rl, rh), 0x88);
60 r = _mm_shuffle_epi8 (r, _mm_set_epi64x (0, 0x0e060c040a020800));
61 i = count_trailing_zeros (_mm_movemask_epi8 (r) |
62 (1 << VHOST_MEMORY_MAX_NREGIONS));
64 if (i < vui->nregions)
67 return (void *) (vui->region_mmap_addr[i] + addr -
68 vui->regions[i].guest_phys_addr);
70 #elif __aarch64__ && __ARM_NEON
71 uint64x2_t al, ah, rl, rh, r;
74 al = vdupq_n_u64 (addr + 1);
75 ah = vdupq_n_u64 (addr);
78 rl = vld1q_u64 (&vui->region_guest_addr_lo[0]);
79 rl = vcgtq_u64 (al, rl);
80 rh = vld1q_u64 (&vui->region_guest_addr_hi[0]);
81 rh = vcgtq_u64 (rh, ah);
82 r = vandq_u64 (rl, rh);
83 u32 |= (vgetq_lane_u8 (vreinterpretq_u8_u64 (r), 0) & 0x1);
84 u32 |= ((vgetq_lane_u8 (vreinterpretq_u8_u64 (r), 8) & 0x1) << 1);
88 i = count_trailing_zeros (u32);
89 goto vhost_map_guest_mem_done;
93 rl = vld1q_u64 (&vui->region_guest_addr_lo[2]);
94 rl = vcgtq_u64 (al, rl);
95 rh = vld1q_u64 (&vui->region_guest_addr_hi[2]);
96 rh = vcgtq_u64 (rh, ah);
97 r = vandq_u64 (rl, rh);
98 u32 |= ((vgetq_lane_u8 (vreinterpretq_u8_u64 (r), 0) & 0x1) << 2);
99 u32 |= ((vgetq_lane_u8 (vreinterpretq_u8_u64 (r), 8) & 0x1) << 3);
103 i = count_trailing_zeros (u32);
104 goto vhost_map_guest_mem_done;
108 rl = vld1q_u64 (&vui->region_guest_addr_lo[4]);
109 rl = vcgtq_u64 (al, rl);
110 rh = vld1q_u64 (&vui->region_guest_addr_hi[4]);
111 rh = vcgtq_u64 (rh, ah);
112 r = vandq_u64 (rl, rh);
113 u32 |= ((vgetq_lane_u8 (vreinterpretq_u8_u64 (r), 0) & 0x1) << 6);
114 u32 |= ((vgetq_lane_u8 (vreinterpretq_u8_u64 (r), 8) & 0x1) << 7);
116 i = count_trailing_zeros (u32 | (1 << VHOST_MEMORY_MAX_NREGIONS));
118 vhost_map_guest_mem_done:
119 if (i < vui->nregions)
122 return (void *) (vui->region_mmap_addr[i] + addr -
123 vui->regions[i].guest_phys_addr);
126 for (i = 0; i < vui->nregions; i++)
128 if ((vui->regions[i].guest_phys_addr <= addr) &&
129 ((vui->regions[i].guest_phys_addr + vui->regions[i].memory_size) >
133 return (void *) (vui->region_mmap_addr[i] + addr -
134 vui->regions[i].guest_phys_addr);
139 ELOG_TYPE_DECLARE (el) =
141 .format = "failed to map guest mem addr %lx",
149 ed = ELOG_DATA (&vlib_global_main.elog_main, el);
155 static_always_inline void *
156 map_user_mem (vhost_user_intf_t * vui, uword addr)
159 for (i = 0; i < vui->nregions; i++)
161 if ((vui->regions[i].userspace_addr <= addr) &&
162 ((vui->regions[i].userspace_addr + vui->regions[i].memory_size) >
165 return (void *) (vui->region_mmap_addr[i] + addr -
166 vui->regions[i].userspace_addr);
172 #define VHOST_LOG_PAGE 0x1000
174 static_always_inline void
175 vhost_user_log_dirty_pages_2 (vhost_user_intf_t * vui,
176 u64 addr, u64 len, u8 is_host_address)
178 if (PREDICT_TRUE (vui->log_base_addr == 0
179 || !(vui->features & VIRTIO_FEATURE (VHOST_F_LOG_ALL))))
185 addr = pointer_to_uword (map_user_mem (vui, (uword) addr));
187 if (PREDICT_FALSE ((addr + len - 1) / VHOST_LOG_PAGE / 8 >= vui->log_size))
189 vu_log_debug (vui, "vhost_user_log_dirty_pages(): out of range\n");
193 CLIB_MEMORY_BARRIER ();
194 u64 page = addr / VHOST_LOG_PAGE;
195 while (page * VHOST_LOG_PAGE < addr + len)
197 ((u8 *) vui->log_base_addr)[page / 8] |= 1 << page % 8;
203 #define vhost_user_log_dirty_ring(vui, vq, member) \
204 if (PREDICT_FALSE(vq->log_used)) { \
205 vhost_user_log_dirty_pages_2(vui, vq->log_guest_addr + STRUCT_OFFSET_OF(vring_used_t, member), \
206 sizeof(vq->used->member), 0); \
209 static_always_inline u8 *
210 format_vhost_trace (u8 * s, va_list * va)
212 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
213 CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
214 CLIB_UNUSED (vnet_main_t * vnm) = vnet_get_main ();
215 vhost_user_main_t *vum = &vhost_user_main;
216 vhost_trace_t *t = va_arg (*va, vhost_trace_t *);
217 vhost_user_intf_t *vui = vum->vhost_user_interfaces + t->device_index;
218 vnet_sw_interface_t *sw;
221 if (pool_is_free (vum->vhost_user_interfaces, vui))
223 s = format (s, "vhost-user interface is deleted");
226 sw = vnet_get_sw_interface (vnm, vui->sw_if_index);
227 indent = format_get_indent (s);
228 s = format (s, "%U %U queue %d\n", format_white_space, indent,
229 format_vnet_sw_interface_name, vnm, sw, t->qid);
231 s = format (s, "%U virtio flags:\n", format_white_space, indent);
233 if (t->virtio_ring_flags & (1 << VIRTIO_TRACE_F_##n)) \
234 s = format (s, "%U %s %s\n", format_white_space, indent, #n, st);
235 foreach_virtio_trace_flags
237 s = format (s, "%U virtio_net_hdr first_desc_len %u\n",
238 format_white_space, indent, t->first_desc_len);
240 s = format (s, "%U flags 0x%02x gso_type %u\n",
241 format_white_space, indent,
242 t->hdr.hdr.flags, t->hdr.hdr.gso_type);
244 if (vui->virtio_net_hdr_sz == 12)
245 s = format (s, "%U num_buff %u",
246 format_white_space, indent, t->hdr.num_buffers);
251 static_always_inline u64
252 vhost_user_is_packed_ring_supported (vhost_user_intf_t * vui)
254 return (vui->features & VIRTIO_FEATURE (VIRTIO_F_RING_PACKED));
257 static_always_inline u64
258 vhost_user_is_event_idx_supported (vhost_user_intf_t * vui)
260 return (vui->features & VIRTIO_FEATURE (VIRTIO_RING_F_EVENT_IDX));
263 static_always_inline void
264 vhost_user_kick (vlib_main_t * vm, vhost_user_vring_t * vq)
266 vhost_user_main_t *vum = &vhost_user_main;
268 int fd = UNIX_GET_FD (vq->callfd_idx);
271 rv = write (fd, &x, sizeof (x));
272 if (PREDICT_FALSE (rv <= 0))
275 ("Error: Could not write to unix socket for callfd %d", fd);
279 vq->n_since_last_int = 0;
280 vq->int_deadline = vlib_time_now (vm) + vum->coalesce_time;
283 static_always_inline u16
284 vhost_user_avail_event_idx (vhost_user_vring_t * vq)
286 volatile u16 *event_idx = (u16 *) & (vq->used->ring[vq->qsz_mask + 1]);
291 static_always_inline u16
292 vhost_user_used_event_idx (vhost_user_vring_t * vq)
294 volatile u16 *event_idx = (u16 *) & (vq->avail->ring[vq->qsz_mask + 1]);
299 static_always_inline u16
300 vhost_user_need_event (u16 event_idx, u16 new_idx, u16 old_idx)
302 return ((u16) (new_idx - event_idx - 1) < (u16) (new_idx - old_idx));
305 static_always_inline void
306 vhost_user_send_call_event_idx (vlib_main_t * vm, vhost_user_vring_t * vq)
308 vhost_user_main_t *vum = &vhost_user_main;
309 u8 first_kick = vq->first_kick;
310 u16 event_idx = vhost_user_used_event_idx (vq);
313 if (vhost_user_need_event (event_idx, vq->last_used_idx, vq->last_kick) ||
314 PREDICT_FALSE (!first_kick))
316 vhost_user_kick (vm, vq);
317 vq->last_kick = event_idx;
321 vq->n_since_last_int = 0;
322 vq->int_deadline = vlib_time_now (vm) + vum->coalesce_time;
326 static_always_inline void
327 vhost_user_send_call_event_idx_packed (vlib_main_t * vm,
328 vhost_user_vring_t * vq)
330 vhost_user_main_t *vum = &vhost_user_main;
331 u8 first_kick = vq->first_kick;
334 u16 new_idx = vq->last_used_idx;
335 u16 old_idx = vq->last_kick;
337 if (PREDICT_TRUE (vq->avail_event->flags == VRING_EVENT_F_DESC))
339 CLIB_COMPILER_BARRIER ();
340 off_wrap = vq->avail_event->off_wrap;
341 event_idx = off_wrap & 0x7fff;
342 if (vq->used_wrap_counter != (off_wrap >> 15))
343 event_idx -= (vq->qsz_mask + 1);
345 if (new_idx <= old_idx)
346 old_idx -= (vq->qsz_mask + 1);
349 vq->last_kick = event_idx;
350 if (vhost_user_need_event (event_idx, new_idx, old_idx) ||
351 PREDICT_FALSE (!first_kick))
352 vhost_user_kick (vm, vq);
355 vq->n_since_last_int = 0;
356 vq->int_deadline = vlib_time_now (vm) + vum->coalesce_time;
360 vhost_user_kick (vm, vq);
363 static_always_inline void
364 vhost_user_send_call (vlib_main_t * vm, vhost_user_intf_t * vui,
365 vhost_user_vring_t * vq)
367 if (vhost_user_is_event_idx_supported (vui))
369 if (vhost_user_is_packed_ring_supported (vui))
370 vhost_user_send_call_event_idx_packed (vm, vq);
372 vhost_user_send_call_event_idx (vm, vq);
375 vhost_user_kick (vm, vq);
378 static_always_inline u8
379 vui_is_link_up (vhost_user_intf_t * vui)
381 return vui->admin_up && vui->is_ready;
384 static_always_inline void
385 vhost_user_update_gso_interface_count (vhost_user_intf_t * vui, u8 add)
387 vhost_user_main_t *vum = &vhost_user_main;
397 ASSERT (vum->gso_count > 0);
403 static_always_inline u8
404 vhost_user_packed_desc_available (vhost_user_vring_t * vring, u16 idx)
406 return (((vring->packed_desc[idx].flags & VRING_DESC_F_AVAIL) ==
407 vring->avail_wrap_counter));
410 static_always_inline void
411 vhost_user_advance_last_avail_idx (vhost_user_vring_t * vring)
413 vring->last_avail_idx++;
414 if (PREDICT_FALSE ((vring->last_avail_idx & vring->qsz_mask) == 0))
416 vring->avail_wrap_counter ^= VRING_DESC_F_AVAIL;
417 vring->last_avail_idx = 0;
421 static_always_inline void
422 vhost_user_advance_last_avail_table_idx (vhost_user_intf_t * vui,
423 vhost_user_vring_t * vring,
428 vring_packed_desc_t *desc_table = vring->packed_desc;
430 /* pick up the slot of the next avail idx */
431 while (desc_table[vring->last_avail_idx & vring->qsz_mask].flags &
433 vhost_user_advance_last_avail_idx (vring);
436 vhost_user_advance_last_avail_idx (vring);
439 static_always_inline void
440 vhost_user_undo_advanced_last_avail_idx (vhost_user_vring_t * vring)
442 if (PREDICT_FALSE ((vring->last_avail_idx & vring->qsz_mask) == 0))
443 vring->avail_wrap_counter ^= VRING_DESC_F_AVAIL;
445 if (PREDICT_FALSE (vring->last_avail_idx == 0))
446 vring->last_avail_idx = vring->qsz_mask;
448 vring->last_avail_idx--;
451 static_always_inline void
452 vhost_user_dequeue_descs (vhost_user_vring_t * rxvq,
453 virtio_net_hdr_mrg_rxbuf_t * hdr,
454 u16 * n_descs_processed)
458 *n_descs_processed -= (hdr->num_buffers - 1);
459 for (i = 0; i < hdr->num_buffers - 1; i++)
460 vhost_user_undo_advanced_last_avail_idx (rxvq);
463 static_always_inline void
464 vhost_user_dequeue_chained_descs (vhost_user_vring_t * rxvq,
465 u16 * n_descs_processed)
467 while (*n_descs_processed)
469 vhost_user_undo_advanced_last_avail_idx (rxvq);
470 (*n_descs_processed)--;
474 static_always_inline void
475 vhost_user_advance_last_used_idx (vhost_user_vring_t * vring)
477 vring->last_used_idx++;
478 if (PREDICT_FALSE ((vring->last_used_idx & vring->qsz_mask) == 0))
480 vring->used_wrap_counter ^= 1;
481 vring->last_used_idx = 0;
488 * fd.io coding-style-patch-verification: ON
491 * eval: (c-set-style "gnu")