#include <vnet/ip/ip.h>
#include <vnet/ethernet/ethernet.h>
+#include <vnet/devices/devices.h>
+#include <vnet/feature/feature.h>
#include <vnet/devices/virtio/vhost-user.h>
_(NONE, "no error") \
_(NOT_READY, "vhost user state error") \
_(PKT_DROP_NOBUF, "tx packet drops (no available descriptors)") \
- _(MMAP_FAIL, "mmap failure")
+ _(PKT_DROP_NOMRG, "tx packet drops (cannot merge descriptors)") \
+ _(MMAP_FAIL, "mmap failure") \
+ _(INDIRECT_OVERFLOW, "indirect descriptor table overflow")
typedef enum
{
_(NO_ERROR, "no error") \
_(NO_BUFFER, "no available buffer") \
_(MMAP_FAIL, "mmap failure") \
- _(UNDERSIZED_FRAME, "undersized ethernet frame received (< 14 bytes)")
+ _(INDIRECT_OVERFLOW, "indirect descriptor overflows table") \
+ _(UNDERSIZED_FRAME, "undersized ethernet frame received (< 14 bytes)") \
+ _(FULL_RX_QUEUE, "full rx queue (possible driver tx drop)")
typedef enum
{
return 0;
}
-
-static inline void *
-map_guest_mem (vhost_user_intf_t * vui, uword addr)
+static_always_inline void *
+map_guest_mem (vhost_user_intf_t * vui, uword addr, u32 * hint)
{
- int i;
+ int i = *hint;
+ if (PREDICT_TRUE ((vui->regions[i].guest_phys_addr <= addr) &&
+ ((vui->regions[i].guest_phys_addr +
+ vui->regions[i].memory_size) > addr)))
+ {
+ return (void *) (vui->region_mmap_addr[i] + addr -
+ vui->regions[i].guest_phys_addr);
+ }
+#if __SSE4_2__
+ __m128i rl, rh, al, ah, r;
+ al = _mm_set1_epi64x (addr + 1);
+ ah = _mm_set1_epi64x (addr);
+
+ rl = _mm_loadu_si128 ((__m128i *) & vui->region_guest_addr_lo[0]);
+ rl = _mm_cmpgt_epi64 (al, rl);
+ rh = _mm_loadu_si128 ((__m128i *) & vui->region_guest_addr_hi[0]);
+ rh = _mm_cmpgt_epi64 (rh, ah);
+ r = _mm_and_si128 (rl, rh);
+
+ rl = _mm_loadu_si128 ((__m128i *) & vui->region_guest_addr_lo[2]);
+ rl = _mm_cmpgt_epi64 (al, rl);
+ rh = _mm_loadu_si128 ((__m128i *) & vui->region_guest_addr_hi[2]);
+ rh = _mm_cmpgt_epi64 (rh, ah);
+ r = _mm_blend_epi16 (r, _mm_and_si128 (rl, rh), 0x22);
+
+ rl = _mm_loadu_si128 ((__m128i *) & vui->region_guest_addr_lo[4]);
+ rl = _mm_cmpgt_epi64 (al, rl);
+ rh = _mm_loadu_si128 ((__m128i *) & vui->region_guest_addr_hi[4]);
+ rh = _mm_cmpgt_epi64 (rh, ah);
+ r = _mm_blend_epi16 (r, _mm_and_si128 (rl, rh), 0x44);
+
+ rl = _mm_loadu_si128 ((__m128i *) & vui->region_guest_addr_lo[6]);
+ rl = _mm_cmpgt_epi64 (al, rl);
+ rh = _mm_loadu_si128 ((__m128i *) & vui->region_guest_addr_hi[6]);
+ rh = _mm_cmpgt_epi64 (rh, ah);
+ r = _mm_blend_epi16 (r, _mm_and_si128 (rl, rh), 0x88);
+
+ r = _mm_shuffle_epi8 (r, _mm_set_epi64x (0, 0x0e060c040a020800));
+ i = __builtin_ctzll (_mm_movemask_epi8 (r));
+
+ if (i < vui->nregions)
+ {
+ *hint = i;
+ return (void *) (vui->region_mmap_addr[i] + addr -
+ vui->regions[i].guest_phys_addr);
+ }
+
+#else
for (i = 0; i < vui->nregions; i++)
{
if ((vui->regions[i].guest_phys_addr <= addr) &&
((vui->regions[i].guest_phys_addr + vui->regions[i].memory_size) >
addr))
{
+ *hint = i;
return (void *) (vui->region_mmap_addr[i] + addr -
vui->regions[i].guest_phys_addr);
}
}
+#endif
DBG_VQ ("failed to map guest mem addr %llx", addr);
+ *hint = 0;
return 0;
}
vui->nregions = 0;
}
+static void
+vhost_user_tx_thread_placement (vhost_user_intf_t * vui)
+{
+ //Let's try to assign one queue to each thread
+ u32 qid = 0;
+ u32 cpu_index = 0;
+ vui->use_tx_spinlock = 0;
+ while (1)
+ {
+ for (qid = 0; qid < VHOST_VRING_MAX_N / 2; qid++)
+ {
+ vhost_user_vring_t *rxvq = &vui->vrings[VHOST_VRING_IDX_RX (qid)];
+ if (!rxvq->started || !rxvq->enabled)
+ continue;
+
+ vui->per_cpu_tx_qid[cpu_index] = qid;
+ cpu_index++;
+ if (cpu_index == vlib_get_thread_main ()->n_vlib_mains)
+ return;
+ }
+ //We need to loop, meaning the spinlock has to be used
+ vui->use_tx_spinlock = 1;
+ if (cpu_index == 0)
+ {
+ //Could not find a single valid one
+ for (cpu_index = 0;
+ cpu_index < vlib_get_thread_main ()->n_vlib_mains; cpu_index++)
+ {
+ vui->per_cpu_tx_qid[cpu_index] = 0;
+ }
+ return;
+ }
+ }
+}
+
+static void
+vhost_user_rx_thread_placement ()
+{
+ vhost_user_main_t *vum = &vhost_user_main;
+ vhost_user_intf_t *vui;
+ vhost_cpu_t *vhc;
+ u32 *workers = 0;
+
+ //Let's list all workers cpu indexes
+ u32 i;
+ for (i = vum->input_cpu_first_index;
+ i < vum->input_cpu_first_index + vum->input_cpu_count; i++)
+ {
+ vlib_node_set_state (vlib_mains ? vlib_mains[i] : &vlib_global_main,
+ vhost_user_input_node.index,
+ VLIB_NODE_STATE_DISABLED);
+ vec_add1 (workers, i);
+ }
+
+ vec_foreach (vhc, vum->cpus)
+ {
+ vec_reset_length (vhc->rx_queues);
+ }
+
+ i = 0;
+ vec_foreach (vui, vum->vhost_user_interfaces)
+ {
+ if (!vui->active)
+ continue;
+
+ u32 *vui_workers = vec_len (vui->workers) ? vui->workers : workers;
+ u32 qid;
+ for (qid = 0; qid < VHOST_VRING_MAX_N / 2; qid++)
+ {
+ vhost_user_vring_t *txvq = &vui->vrings[VHOST_VRING_IDX_TX (qid)];
+ if (!txvq->started)
+ continue;
+
+ i %= vec_len (vui_workers);
+ u32 cpu_index = vui_workers[i];
+ i++;
+ vhc = &vum->cpus[cpu_index];
+
+ vhost_iface_and_queue_t iaq = {
+ .qid = qid,
+ .vhost_iface_index = vui - vum->vhost_user_interfaces,
+ };
+ vec_add1 (vhc->rx_queues, iaq);
+ vlib_node_set_state (vlib_mains ? vlib_mains[cpu_index] :
+ &vlib_global_main, vhost_user_input_node.index,
+ VLIB_NODE_STATE_POLLING);
+ }
+ }
+}
+
+static int
+vhost_user_thread_placement (u32 sw_if_index, u32 worker_thread_index, u8 del)
+{
+ vhost_user_main_t *vum = &vhost_user_main;
+ vhost_user_intf_t *vui;
+ vnet_hw_interface_t *hw;
+
+ if (worker_thread_index < vum->input_cpu_first_index ||
+ worker_thread_index >=
+ vum->input_cpu_first_index + vum->input_cpu_count)
+ return -1;
+
+ if (!(hw = vnet_get_sup_hw_interface (vnet_get_main (), sw_if_index)))
+ return -2;
+
+ vui = vec_elt_at_index (vum->vhost_user_interfaces, hw->dev_instance);
+ u32 found = ~0, *w;
+ vec_foreach (w, vui->workers)
+ {
+ if (*w == worker_thread_index)
+ {
+ found = w - vui->workers;
+ break;
+ }
+ }
+
+ if (del)
+ {
+ if (found == ~0)
+ return -3;
+ vec_del1 (vui->workers, found);
+ }
+ else if (found == ~0)
+ {
+ vec_add1 (vui->workers, worker_thread_index);
+ }
+
+ vhost_user_rx_thread_placement ();
+ return 0;
+}
+
+/** @brief Returns whether at least one TX and one RX vring are enabled */
+int
+vhost_user_intf_ready (vhost_user_intf_t * vui)
+{
+ int i, found[2] = { }; //RX + TX
+
+ for (i = 0; i < VHOST_VRING_MAX_N; i++)
+ if (vui->vrings[i].started && vui->vrings[i].enabled)
+ found[i & 1] = 1;
+
+ return found[0] && found[1];
+}
+
+static void
+vhost_user_update_iface_state (vhost_user_intf_t * vui)
+{
+ /* if we have pointers to descriptor table, go up */
+ int is_up = vhost_user_intf_ready (vui);
+ if (is_up != vui->is_up)
+ {
+ DBG_SOCK ("interface %d %s", vui->sw_if_index,
+ is_up ? "ready" : "down");
+ vnet_hw_interface_set_flags (vnet_get_main (), vui->hw_if_index,
+ is_up ? VNET_HW_INTERFACE_FLAG_LINK_UP :
+ 0);
+ vui->is_up = is_up;
+ }
+ vhost_user_rx_thread_placement ();
+ vhost_user_tx_thread_placement (vui);
+}
static clib_error_t *
vhost_user_callfd_read_ready (unix_file_t * uf)
return 0;
}
+static clib_error_t *
+vhost_user_kickfd_read_ready (unix_file_t * uf)
+{
+ __attribute__ ((unused)) int n;
+ u8 buff[8];
+ vhost_user_intf_t *vui =
+ vec_elt_at_index (vhost_user_main.vhost_user_interfaces,
+ uf->private_data >> 8);
+ u32 qid = uf->private_data & 0xff;
+ n = read (uf->file_descriptor, ((char *) &buff), 8);
+ DBG_SOCK ("if %d KICK queue %d", uf->private_data >> 8, qid);
+
+ vlib_worker_thread_barrier_sync (vlib_get_main ());
+ vui->vrings[qid].started = 1;
+ vhost_user_update_iface_state (vui);
+ vlib_worker_thread_barrier_release (vlib_get_main ());
+ return 0;
+}
+
+/**
+ * @brief Try once to lock the vring
+ * @return 0 on success, non-zero on failure.
+ */
+static inline int
+vhost_user_vring_try_lock (vhost_user_intf_t * vui, u32 qid)
+{
+ return __sync_lock_test_and_set (vui->vring_locks[qid], 1);
+}
+
+/**
+ * @brief Spin until the vring is successfully locked
+ */
+static inline void
+vhost_user_vring_lock (vhost_user_intf_t * vui, u32 qid)
+{
+ while (vhost_user_vring_try_lock (vui, qid))
+ ;
+}
+
+/**
+ * @brief Unlock the vring lock
+ */
+static inline void
+vhost_user_vring_unlock (vhost_user_intf_t * vui, u32 qid)
+{
+ *vui->vring_locks[qid] = 0;
+}
+
+static inline void
+vhost_user_vring_init (vhost_user_intf_t * vui, u32 qid)
+{
+ vhost_user_vring_t *vring = &vui->vrings[qid];
+ memset (vring, 0, sizeof (*vring));
+ vring->kickfd = -1;
+ vring->callfd = -1;
+ vring->errfd = -1;
+
+ /*
+ * We have a bug with some qemu 2.5, and this may be a fix.
+ * Feel like interpretation holy text, but this is from vhost-user.txt.
+ * "
+ * One queue pair is enabled initially. More queues are enabled
+ * dynamically, by sending message VHOST_USER_SET_VRING_ENABLE.
+ * "
+ * Don't know who's right, but this is what DPDK does.
+ */
+ if (qid == 0 || qid == 1)
+ vring->enabled = 1;
+}
+
+static inline void
+vhost_user_vring_close (vhost_user_intf_t * vui, u32 qid)
+{
+ vhost_user_vring_t *vring = &vui->vrings[qid];
+ if (vring->kickfd != -1)
+ {
+ unix_file_t *uf = pool_elt_at_index (unix_main.file_pool,
+ vring->kickfd_idx);
+ unix_file_del (&unix_main, uf);
+ }
+ if (vring->callfd != -1)
+ {
+ unix_file_t *uf = pool_elt_at_index (unix_main.file_pool,
+ vring->callfd_idx);
+ unix_file_del (&unix_main, uf);
+ }
+ if (vring->errfd != -1)
+ close (vring->errfd);
+ vhost_user_vring_init (vui, qid);
+}
+
static inline void
vhost_user_if_disconnect (vhost_user_intf_t * vui)
{
unix_file_del (&unix_main, unix_main.file_pool + vui->unix_file_index);
vui->unix_file_index = ~0;
}
+ else
+ close (vui->unix_fd);
hash_unset (vum->vhost_user_interface_index_by_sock_fd, vui->unix_fd);
hash_unset (vum->vhost_user_interface_index_by_listener_fd, vui->unix_fd);
- close (vui->unix_fd);
vui->unix_fd = -1;
vui->is_up = 0;
- for (q = 0; q < vui->num_vrings; q++)
- {
- vui->vrings[q].desc = NULL;
- vui->vrings[q].avail = NULL;
- vui->vrings[q].used = NULL;
- vui->vrings[q].log_guest_addr = 0;
- vui->vrings[q].log_used = 0;
- }
+
+ for (q = 0; q < VHOST_VRING_MAX_N; q++)
+ vhost_user_vring_close (vui, q);
unmap_all_mem_regions (vui);
DBG_SOCK ("interface ifindex %d disconnected", vui->sw_if_index);
n = recvmsg (uf->file_descriptor, &mh, 0);
+ /* Stop workers to avoid end of the world */
+ vlib_worker_thread_barrier_sync (vlib_get_main ());
+
if (n != VHOST_USER_MSG_HDR_SZ)
- goto close_socket;
+ {
+ if (n == -1)
+ {
+ DBG_SOCK ("recvmsg returned error %d %s", errno, strerror (errno));
+ }
+ else
+ {
+ DBG_SOCK ("n (%d) != VHOST_USER_MSG_HDR_SZ (%d)",
+ n, VHOST_USER_MSG_HDR_SZ);
+ }
+ goto close_socket;
+ }
if (mh.msg_flags & MSG_CTRUNC)
{
+ DBG_SOCK ("MSG_CTRUNC is set");
goto close_socket;
}
}
{
- int rv __attribute__ ((unused));
- /* $$$$ pay attention to rv */
- rv = read (uf->file_descriptor, ((char *) &msg) + n, msg.size);
+ int rv;
+ rv =
+ read (uf->file_descriptor, ((char *) &msg) + VHOST_USER_MSG_HDR_SZ,
+ msg.size);
+ if (rv < 0)
+ {
+ DBG_SOCK ("read failed %s", strerror (errno));
+ goto close_socket;
+ }
+ else if (rv != msg.size)
+ {
+ DBG_SOCK ("message too short (read %dB should be %dB)", rv, msg.size);
+ goto close_socket;
+ }
}
switch (msg.request)
{
case VHOST_USER_GET_FEATURES:
- DBG_SOCK ("if %d msg VHOST_USER_GET_FEATURES", vui->hw_if_index);
-
msg.flags |= 4;
- msg.u64 = (1 << FEAT_VIRTIO_NET_F_MRG_RXBUF) |
- (1 << FEAT_VIRTIO_F_ANY_LAYOUT) |
- (1 << FEAT_VHOST_F_LOG_ALL) |
- (1 << FEAT_VIRTIO_NET_F_GUEST_ANNOUNCE) |
- (1 << FEAT_VHOST_USER_F_PROTOCOL_FEATURES);
+ msg.u64 = (1ULL << FEAT_VIRTIO_NET_F_MRG_RXBUF) |
+ (1ULL << FEAT_VIRTIO_NET_F_CTRL_VQ) |
+ (1ULL << FEAT_VIRTIO_F_ANY_LAYOUT) |
+ (1ULL << FEAT_VIRTIO_F_INDIRECT_DESC) |
+ (1ULL << FEAT_VHOST_F_LOG_ALL) |
+ (1ULL << FEAT_VIRTIO_NET_F_GUEST_ANNOUNCE) |
+ (1ULL << FEAT_VIRTIO_NET_F_MQ) |
+ (1ULL << FEAT_VHOST_USER_F_PROTOCOL_FEATURES) |
+ (1ULL << FEAT_VIRTIO_F_VERSION_1);
msg.u64 &= vui->feature_mask;
-
msg.size = sizeof (msg.u64);
+ DBG_SOCK ("if %d msg VHOST_USER_GET_FEATURES - reply 0x%016llx",
+ vui->hw_if_index, msg.u64);
break;
case VHOST_USER_SET_FEATURES:
vui->features = msg.u64;
- if (vui->features & (1 << FEAT_VIRTIO_NET_F_MRG_RXBUF))
+ if (vui->features &
+ ((1 << FEAT_VIRTIO_NET_F_MRG_RXBUF) |
+ (1ULL << FEAT_VIRTIO_F_VERSION_1)))
vui->virtio_net_hdr_sz = 12;
else
vui->virtio_net_hdr_sz = 10;
vnet_hw_interface_set_flags (vnm, vui->hw_if_index, 0);
vui->is_up = 0;
- for (q = 0; q < 2; q++)
- {
- vui->vrings[q].desc = 0;
- vui->vrings[q].avail = 0;
- vui->vrings[q].used = 0;
- vui->vrings[q].log_guest_addr = 0;
- vui->vrings[q].log_used = 0;
- }
-
- DBG_SOCK ("interface %d disconnected", vui->sw_if_index);
+ /*for (q = 0; q < VHOST_VRING_MAX_N; q++)
+ vhost_user_vring_close(&vui->vrings[q]); */
break;
vui->region_mmap_addr[i] = mmap (0, map_sz, PROT_READ | PROT_WRITE,
MAP_SHARED, fds[i], 0);
+ vui->region_guest_addr_lo[i] = vui->regions[i].guest_phys_addr;
+ vui->region_guest_addr_hi[i] = vui->regions[i].guest_phys_addr +
+ vui->regions[i].memory_size;
DBG_SOCK
("map memory region %d addr 0 len 0x%lx fd %d mapped 0x%lx "
if ((msg.state.num > 32768) || /* maximum ring size is 32768 */
(msg.state.num == 0) || /* it cannot be zero */
- (msg.state.num % 2)) /* must be power of 2 */
+ ((msg.state.num - 1) & msg.state.num)) /* must be power of 2 */
goto close_socket;
vui->vrings[msg.state.index].qsz = msg.state.num;
break;
DBG_SOCK ("if %d msg VHOST_USER_SET_VRING_ADDR idx %d",
vui->hw_if_index, msg.state.index);
+ if (msg.state.index >= VHOST_VRING_MAX_N)
+ {
+ DBG_SOCK ("invalid vring index VHOST_USER_SET_VRING_ADDR:"
+ " %d >= %d", msg.state.index, VHOST_VRING_MAX_N);
+ goto close_socket;
+ }
+
+ if (msg.size < sizeof (msg.addr))
+ {
+ DBG_SOCK ("vhost message is too short (%d < %d)",
+ msg.size, sizeof (msg.addr));
+ goto close_socket;
+ }
+
vui->vrings[msg.state.index].desc = (vring_desc_t *)
map_user_mem (vui, msg.addr.desc_user_addr);
vui->vrings[msg.state.index].used = (vring_used_t *)
/* Spec says: If VHOST_USER_F_PROTOCOL_FEATURES has not been negotiated,
the ring is initialized in an enabled state. */
-
if (!(vui->features & (1 << FEAT_VHOST_USER_F_PROTOCOL_FEATURES)))
{
vui->vrings[msg.state.index].enabled = 1;
}
vui->vrings[msg.state.index].last_used_idx =
+ vui->vrings[msg.state.index].last_avail_idx =
vui->vrings[msg.state.index].used->idx;
/* tell driver that we don't want interrupts */
- vui->vrings[msg.state.index].used->flags |= 1;
+ vui->vrings[msg.state.index].used->flags = VRING_USED_F_NO_NOTIFY;
break;
case VHOST_USER_SET_OWNER:
q = (u8) (msg.u64 & 0xFF);
+ /* if there is old fd, delete and close it */
+ if (vui->vrings[q].callfd != -1)
+ {
+ unix_file_t *uf = pool_elt_at_index (unix_main.file_pool,
+ vui->vrings[q].callfd_idx);
+ unix_file_del (&unix_main, uf);
+ }
+
if (!(msg.u64 & 0x100))
{
if (number_of_fds != 1)
- goto close_socket;
-
- /* if there is old fd, delete it */
- if (vui->vrings[q].callfd)
{
- unix_file_t *uf = pool_elt_at_index (unix_main.file_pool,
- vui->vrings[q].callfd_idx);
- unix_file_del (&unix_main, uf);
+ DBG_SOCK ("More than one fd received !");
+ goto close_socket;
}
+
vui->vrings[q].callfd = fds[0];
template.read_function = vhost_user_callfd_read_ready;
template.file_descriptor = fds[0];
q = (u8) (msg.u64 & 0xFF);
+ if (vui->vrings[q].kickfd != -1)
+ {
+ unix_file_t *uf = pool_elt_at_index (unix_main.file_pool,
+ vui->vrings[q].kickfd);
+ unix_file_del (&unix_main, uf);
+ }
+
if (!(msg.u64 & 0x100))
{
if (number_of_fds != 1)
- goto close_socket;
+ {
+ DBG_SOCK ("More than one fd received !");
+ goto close_socket;
+ }
+
+ if (vui->vrings[q].kickfd > -1)
+ close (vui->vrings[q].kickfd);
vui->vrings[q].kickfd = fds[0];
+ template.read_function = vhost_user_kickfd_read_ready;
+ template.file_descriptor = fds[0];
+ template.private_data =
+ ((vui - vhost_user_main.vhost_user_interfaces) << 8) + q;
+ vui->vrings[q].kickfd_idx = unix_file_add (&unix_main, &template);
}
else
- vui->vrings[q].kickfd = -1;
+ {
+ vui->vrings[q].kickfd = -1;
+ vui->vrings[q].started = 1;
+ }
+
+ //TODO: When kickfd is specified, 'started' is set when the first kick
+ //is received.
break;
case VHOST_USER_SET_VRING_ERR:
q = (u8) (msg.u64 & 0xFF);
+ if (vui->vrings[q].errfd != -1)
+ close (vui->vrings[q].errfd);
+
if (!(msg.u64 & 0x100))
{
if (number_of_fds != 1)
goto close_socket;
- fd = fds[0];
+ vui->vrings[q].errfd = fds[0];
}
else
- fd = -1;
+ vui->vrings[q].errfd = -1;
- vui->vrings[q].errfd = fd;
break;
case VHOST_USER_SET_VRING_BASE:
DBG_SOCK ("if %d msg VHOST_USER_GET_VRING_BASE idx %d num %d",
vui->hw_if_index, msg.state.index, msg.state.num);
+ if (msg.state.index >= VHOST_VRING_MAX_N)
+ {
+ DBG_SOCK ("invalid vring index VHOST_USER_GET_VRING_BASE:"
+ " %d >= %d", msg.state.index, VHOST_VRING_MAX_N);
+ goto close_socket;
+ }
+
/* Spec says: Client must [...] stop ring upon receiving VHOST_USER_GET_VRING_BASE. */
- vui->vrings[msg.state.index].enabled = 0;
+ vhost_user_vring_close (vui, msg.state.index);
msg.state.num = vui->vrings[msg.state.index].last_avail_idx;
msg.flags |= 4;
vui->hw_if_index);
msg.flags |= 4;
- msg.u64 = (1 << VHOST_USER_PROTOCOL_F_LOG_SHMFD);
+ msg.u64 = (1 << VHOST_USER_PROTOCOL_F_LOG_SHMFD) |
+ (1 << VHOST_USER_PROTOCOL_F_MQ);
msg.size = sizeof (msg.u64);
break;
break;
+ case VHOST_USER_GET_QUEUE_NUM:
+ DBG_SOCK ("if %d msg VHOST_USER_GET_QUEUE_NUM", vui->hw_if_index);
+ msg.flags |= 4;
+ msg.u64 = VHOST_VRING_MAX_N;
+ msg.size = sizeof (msg.u64);
+ break;
+
case VHOST_USER_SET_VRING_ENABLE:
- DBG_SOCK ("if %d VHOST_USER_SET_VRING_ENABLE, enable: %d",
- vui->hw_if_index, msg.state.num);
+ DBG_SOCK ("if %d VHOST_USER_SET_VRING_ENABLE: %s queue %d",
+ vui->hw_if_index, msg.state.num ? "enable" : "disable",
+ msg.state.index);
+ if (msg.state.index >= VHOST_VRING_MAX_N)
+ {
+ DBG_SOCK ("invalid vring index VHOST_USER_SET_VRING_ENABLE:"
+ " %d >= %d", msg.state.index, VHOST_VRING_MAX_N);
+ goto close_socket;
+ }
+
vui->vrings[msg.state.index].enabled = msg.state.num;
break;
goto close_socket;
}
- /* if we have pointers to descriptor table, go up */
- if (!vui->is_up &&
- vui->vrings[VHOST_NET_VRING_IDX_TX].desc &&
- vui->vrings[VHOST_NET_VRING_IDX_RX].desc)
- {
-
- DBG_SOCK ("interface %d connected", vui->sw_if_index);
-
- vnet_hw_interface_set_flags (vnm, vui->hw_if_index,
- VNET_HW_INTERFACE_FLAG_LINK_UP);
- vui->is_up = 1;
-
- }
-
/* if we need to reply */
if (msg.flags & 4)
{
n =
send (uf->file_descriptor, &msg, VHOST_USER_MSG_HDR_SZ + msg.size, 0);
if (n != (msg.size + VHOST_USER_MSG_HDR_SZ))
- goto close_socket;
+ {
+ DBG_SOCK ("could not send message response");
+ goto close_socket;
+ }
}
+ vhost_user_update_iface_state (vui);
+ vlib_worker_thread_barrier_release (vlib_get_main ());
return 0;
close_socket:
vhost_user_if_disconnect (vui);
+ vhost_user_update_iface_state (vui);
+ vlib_worker_thread_barrier_release (vlib_get_main ());
return 0;
}
static clib_error_t *
vhost_user_socket_error (unix_file_t * uf)
{
+ vlib_main_t *vm = vlib_get_main ();
vhost_user_main_t *vum = &vhost_user_main;
vhost_user_intf_t *vui;
uword *p;
else
vui = vec_elt_at_index (vum->vhost_user_interfaces, p[0]);
+ DBG_SOCK ("socket error on if %d", vui->sw_if_index);
+ vlib_worker_thread_barrier_sync (vm);
vhost_user_if_disconnect (vui);
+ vhost_user_rx_thread_placement ();
+ vlib_worker_thread_barrier_release (vm);
return 0;
}
if (client_fd < 0)
return clib_error_return_unix (0, "accept");
+ DBG_SOCK ("New client socket for vhost interface %d", vui->sw_if_index);
template.read_function = vhost_user_socket_read;
template.error_function = vhost_user_socket_error;
template.file_descriptor = client_fd;
clib_error_t *error;
vhost_user_main_t *vum = &vhost_user_main;
vlib_thread_main_t *tm = vlib_get_thread_main ();
+ vlib_thread_registration_t *tr;
+ uword *p;
error = vlib_call_init_function (vm, ip4_init);
if (error)
vec_validate_aligned (vum->rx_buffers, tm->n_vlib_mains - 1,
CLIB_CACHE_LINE_BYTES);
+ vec_validate (vum->cpus, tm->n_vlib_mains - 1);
+
+ /* find out which cpus will be used for input */
+ vum->input_cpu_first_index = 0;
+ vum->input_cpu_count = 1;
+ p = hash_get_mem (tm->thread_registrations_by_name, "workers");
+ tr = p ? (vlib_thread_registration_t *) p[0] : 0;
+
+ if (tr && tr->count > 0)
+ {
+ vum->input_cpu_first_index = tr->first_index;
+ vum->input_cpu_count = tr->count;
+ }
return 0;
}
VLIB_MAIN_LOOP_EXIT_FUNCTION (vhost_user_exit);
-enum
-{
- VHOST_USER_RX_NEXT_ETHERNET_INPUT,
- VHOST_USER_RX_NEXT_DROP,
- VHOST_USER_RX_N_NEXT,
-};
-
-
typedef struct
{
- u16 virtqueue;
- u16 device_index;
+ u16 qid; /** The interface queue index (Not the virtio vring idx) */
+ u16 device_index; /** The device index */
#if VHOST_USER_COPY_TX_HDR == 1
virtio_net_hdr_t hdr;
#endif
uword indent = format_get_indent (s);
#endif
- s = format (s, "%U virtqueue %d",
- format_vnet_sw_interface_name, vnm, sw, t->virtqueue);
+ s = format (s, "%U queue %d",
+ format_vnet_sw_interface_name, vnm, sw, t->qid);
#if VHOST_USER_COPY_TX_HDR == 1
s = format (s, "\n%Uvirtio_net_hdr flags 0x%02x gso_type %u hdr_len %u",
void
vhost_user_rx_trace (vlib_main_t * vm,
vlib_node_runtime_t * node,
- vhost_user_intf_t * vui, i16 virtqueue)
+ vhost_user_intf_t * vui, u16 qid)
{
u32 *b, n_left;
vhost_user_main_t *vum = &vhost_user_main;
- u32 next_index = VHOST_USER_RX_NEXT_ETHERNET_INPUT;
+ u32 next_index = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
+ u32 cpu_index = os_get_cpu_number ();
- n_left = vec_len (vui->d_trace_buffers);
- b = vui->d_trace_buffers;
+ vhost_cpu_t *vhc = vec_elt_at_index (vum->cpus, cpu_index);
+ n_left = vec_len (vhc->trace_buffers);
+ b = vhc->trace_buffers;
while (n_left >= 1)
{
b0 = vlib_get_buffer (vm, bi0);
vlib_trace_buffer (vm, node, next_index, b0, /* follow_chain */ 0);
t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
- t0->virtqueue = virtqueue;
+ t0->qid = qid;
t0->device_index = vui - vum->vhost_user_interfaces;
#if VHOST_USER_COPY_TX_HDR == 1
clib_memcpy (&t0->hdr, b0->pre_data, sizeof (virtio_net_hdr_t));
static u32
vhost_user_if_input (vlib_main_t * vm,
vhost_user_main_t * vum,
- vhost_user_intf_t * vui, vlib_node_runtime_t * node)
+ vhost_user_intf_t * vui,
+ u16 qid, vlib_node_runtime_t * node)
{
- vhost_user_vring_t *txvq = &vui->vrings[VHOST_NET_VRING_IDX_TX];
- vhost_user_vring_t *rxvq = &vui->vrings[VHOST_NET_VRING_IDX_RX];
+ vhost_user_vring_t *txvq = &vui->vrings[VHOST_VRING_IDX_TX (qid)];
+ vhost_user_vring_t *rxvq = &vui->vrings[VHOST_VRING_IDX_RX (qid)];
uword n_rx_packets = 0, n_rx_bytes = 0;
uword n_left;
u32 n_left_to_next, *to_next;
uword n_trace = vlib_get_trace_count (vm, node);
u16 qsz_mask;
u32 cpu_index, rx_len, drops, flush;
+ vhost_cpu_t *vhc;
f64 now = vlib_time_now (vm);
+ u32 map_guest_hint_desc = 0;
+ u32 map_guest_hint_indirect = 0;
+ u32 *map_guest_hint_p = &map_guest_hint_desc;
- vec_reset_length (vui->d_trace_buffers);
-
- /* no descriptor ptr - bail out */
- if (PREDICT_FALSE (!txvq->desc || !txvq->avail || !txvq->enabled))
- return 0;
-
- /* do we have pending intterupts ? */
+ /* do we have pending interrupts ? */
if ((txvq->n_since_last_int) && (txvq->int_deadline < now))
vhost_user_send_call (vm, txvq);
if ((rxvq->n_since_last_int) && (rxvq->int_deadline < now))
vhost_user_send_call (vm, rxvq);
- /* only bit 0 of avail.flags is used so we don't want to deal with this
- interface if any other bit is set */
if (PREDICT_FALSE (txvq->avail->flags & 0xFFFE))
return 0;
+ n_left = (u16) (txvq->avail->idx - txvq->last_avail_idx);
+
/* nothing to do */
- if (txvq->avail->idx == txvq->last_avail_idx)
+ if (PREDICT_FALSE (n_left == 0))
return 0;
- if (PREDICT_TRUE (txvq->avail->idx > txvq->last_avail_idx))
- n_left = txvq->avail->idx - txvq->last_avail_idx;
- else /* wrapped */
- n_left = (u16) - 1 - txvq->last_avail_idx + txvq->avail->idx;
-
- if (PREDICT_FALSE (!vui->admin_up))
+ if (PREDICT_FALSE (!vui->admin_up || !(txvq->enabled)))
{
- /* if intf is admin down, just drop all packets waiting in the ring */
+ /*
+ * Discard input packet if interface is admin down or vring is not
+ * enabled.
+ * "For example, for a networking device, in the disabled state
+ * client must not supply any new RX packets, but must process
+ * and discard any TX packets."
+ */
+
txvq->last_avail_idx = txvq->last_used_idx = txvq->avail->idx;
CLIB_MEMORY_BARRIER ();
txvq->used->idx = txvq->last_used_idx;
return 0;
}
- if (PREDICT_FALSE (n_left > txvq->qsz))
- return 0;
+ if (PREDICT_FALSE (n_left == txvq->qsz))
+ {
+ //Informational error logging when VPP is not receiving packets fast enough
+ vlib_error_count (vm, node->node_index,
+ VHOST_USER_INPUT_FUNC_ERROR_FULL_RX_QUEUE, 1);
+ }
qsz_mask = txvq->qsz - 1;
cpu_index = os_get_cpu_number ();
+ vhc = vec_elt_at_index (vum->cpus, cpu_index);
drops = 0;
flush = 0;
*/
if (PREDICT_FALSE (!vum->rx_buffers[cpu_index]))
{
- vec_alloc (vum->rx_buffers[cpu_index], VLIB_FRAME_SIZE);
+ vec_alloc (vum->rx_buffers[cpu_index], 2 * VLIB_FRAME_SIZE);
if (PREDICT_FALSE (!vum->rx_buffers[cpu_index]))
flush = n_left; //Drop all input
if (PREDICT_FALSE (_vec_len (vum->rx_buffers[cpu_index]) < n_left))
{
+ u32 curr_len = _vec_len (vum->rx_buffers[cpu_index]);
_vec_len (vum->rx_buffers[cpu_index]) +=
vlib_buffer_alloc_from_free_list (vm,
vum->rx_buffers[cpu_index] +
- _vec_len (vum->rx_buffers
- [cpu_index]),
- VLIB_FRAME_SIZE -
- _vec_len (vum->rx_buffers
- [cpu_index]),
+ curr_len,
+ 2 * VLIB_FRAME_SIZE - curr_len,
VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
if (PREDICT_FALSE (n_left > _vec_len (vum->rx_buffers[cpu_index])))
u16 desc_chain_head, desc_current;
u8 error = VHOST_USER_INPUT_FUNC_ERROR_NO_ERROR;
+ if (PREDICT_TRUE (n_left > 1))
+ {
+ u32 next_desc =
+ txvq->avail->ring[(txvq->last_avail_idx + 1) & qsz_mask];
+ void *buffer_addr =
+ map_guest_mem (vui, txvq->desc[next_desc].addr,
+ &map_guest_hint_desc);
+ if (PREDICT_TRUE (buffer_addr != 0))
+ CLIB_PREFETCH (buffer_addr, 64, STORE);
+
+ u32 bi = vum->rx_buffers[cpu_index][rx_len - 2];
+ vlib_prefetch_buffer_with_index (vm, bi, STORE);
+ CLIB_PREFETCH (vlib_get_buffer (vm, bi)->data, 128, STORE);
+ }
+
desc_chain_head = desc_current =
txvq->avail->ring[txvq->last_avail_idx & qsz_mask];
bi_head = bi_current = vum->rx_buffers[cpu_index][--rx_len];
uword offset;
if (PREDICT_TRUE (vui->is_any_layout) ||
- !(txvq->desc[desc_current].flags & VIRTQ_DESC_F_NEXT))
+ (!(txvq->desc[desc_current].flags & VIRTQ_DESC_F_NEXT) &&
+ !(txvq->desc[desc_current].flags & VIRTQ_DESC_F_INDIRECT)))
{
/* ANYLAYOUT or single buffer */
offset = vui->virtio_net_hdr_sz;
offset = txvq->desc[desc_current].len;
}
+ vring_desc_t *desc_table = txvq->desc;
+ u32 desc_index = desc_current;
+ map_guest_hint_p = &map_guest_hint_desc;
+
+ if (txvq->desc[desc_current].flags & VIRTQ_DESC_F_INDIRECT)
+ {
+ desc_table = map_guest_mem (vui, txvq->desc[desc_current].addr,
+ &map_guest_hint_desc);
+ desc_index = 0;
+ map_guest_hint_p = &map_guest_hint_indirect;
+ if (PREDICT_FALSE (desc_table == 0))
+ {
+ error = VHOST_USER_INPUT_FUNC_ERROR_MMAP_FAIL;
+ goto out;
+ }
+ }
+
while (1)
{
void *buffer_addr =
- map_guest_mem (vui, txvq->desc[desc_current].addr);
+ map_guest_mem (vui, desc_table[desc_index].addr,
+ map_guest_hint_p);
if (PREDICT_FALSE (buffer_addr == 0))
{
error = VHOST_USER_INPUT_FUNC_ERROR_MMAP_FAIL;
- break;
+ goto out;
+ }
+
+ if (PREDICT_TRUE
+ (desc_table[desc_index].flags & VIRTQ_DESC_F_NEXT))
+ {
+ CLIB_PREFETCH (&desc_table[desc_table[desc_index].next],
+ sizeof (vring_desc_t), STORE);
}
#if VHOST_USER_COPY_TX_HDR == 1
clib_memcpy (b->pre_data, buffer_addr, sizeof (virtio_net_hdr_t)); /* 12 byte hdr is not used on tx */
#endif
- if (txvq->desc[desc_current].len > offset)
+ if (desc_table[desc_index].len > offset)
{
- u16 len = txvq->desc[desc_current].len - offset;
+ u16 len = desc_table[desc_index].len - offset;
u16 copied = vlib_buffer_chain_append_data_with_alloc (vm,
VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX,
b_head,
+
offset,
len);
-
if (copied != len)
{
error = VHOST_USER_INPUT_FUNC_ERROR_NO_BUFFER;
offset = 0;
/* if next flag is set, take next desc in the chain */
- if (txvq->desc[desc_current].flags & VIRTQ_DESC_F_NEXT)
- desc_current = txvq->desc[desc_current].next;
+ if ((desc_table[desc_index].flags & VIRTQ_DESC_F_NEXT))
+ desc_index = desc_table[desc_index].next;
else
- break;
+ goto out;
}
+ out:
/* consume the descriptor and return it as used */
txvq->last_avail_idx++;
ring[txvq->last_used_idx & qsz_mask]);
txvq->last_used_idx++;
+ //It is important to free RX as fast as possible such that the TX
+ //process does not drop packets
+ if ((txvq->last_used_idx & 0x3f) == 0) // Every 64 packets
+ txvq->used->idx = txvq->last_used_idx;
+
if (PREDICT_FALSE (b_head->current_length < 14 &&
error == VHOST_USER_INPUT_FUNC_ERROR_NO_ERROR))
- {
- error = VHOST_USER_INPUT_FUNC_ERROR_UNDERSIZED_FRAME;
- }
+ error = VHOST_USER_INPUT_FUNC_ERROR_UNDERSIZED_FRAME;
VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b_head);
b_head->error = node->errors[error];
if (PREDICT_FALSE (n_trace > n_rx_packets))
- vec_add1 (vui->d_trace_buffers, bi_head);
+ vec_add1 (vhc->trace_buffers, bi_head);
if (PREDICT_FALSE (error))
{
drops++;
- next0 = VHOST_USER_RX_NEXT_DROP;
+ next0 = VNET_DEVICE_INPUT_NEXT_DROP;
}
else
{
b_head->current_length +
b_head->total_length_not_including_first_buffer;
n_rx_packets++;
- next0 = VHOST_USER_RX_NEXT_ETHERNET_INPUT;
+ next0 = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
}
to_next[0] = bi_head;
to_next++;
n_left_to_next--;
+
+ /* redirect if feature path enabled */
+ vnet_feature_device_input_redirect_x1 (node, vui->sw_if_index,
+ &next0, b_head, 0);
+
vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
to_next, n_left_to_next,
bi_head, next0);
n_left--;
+ if (PREDICT_FALSE (!n_left))
+ {
+ // I NEED SOME MORE !
+ u32 remain = (u16) (txvq->avail->idx - txvq->last_avail_idx);
+ remain = (remain > VLIB_FRAME_SIZE - n_rx_packets) ?
+ VLIB_FRAME_SIZE - n_rx_packets : remain;
+ remain = (remain > rx_len) ? rx_len : remain;
+ n_left = remain;
+ }
}
vlib_put_next_frame (vm, node, next_index, n_left_to_next);
txvq->used->idx = txvq->last_used_idx;
vhost_user_log_dirty_ring (vui, txvq, idx);
- if (PREDICT_FALSE (vec_len (vui->d_trace_buffers) > 0))
- {
- vhost_user_rx_trace (vm, node, vui, VHOST_NET_VRING_IDX_TX);
- vlib_set_trace_count (vm, node,
- n_trace - vec_len (vui->d_trace_buffers));
- }
-
/* interrupt (call) handling */
- if ((txvq->callfd > 0) && !(txvq->avail->flags & 1))
+ if ((txvq->callfd > -1) && !(txvq->avail->flags & 1))
{
txvq->n_since_last_int += n_rx_packets;
vhost_user_send_call (vm, txvq);
}
+ if (PREDICT_FALSE (vec_len (vhc->trace_buffers) > 0))
+ {
+ vhost_user_rx_trace (vm, node, vui, qid);
+ vlib_set_trace_count (vm, node, n_trace - vec_len (vhc->trace_buffers));
+ vec_reset_length (vhc->trace_buffers);
+ }
+
if (PREDICT_FALSE (drops))
{
vlib_increment_simple_counter
vlib_node_runtime_t * node, vlib_frame_t * f)
{
vhost_user_main_t *vum = &vhost_user_main;
-#if DPDK > 0
- dpdk_main_t *dm = &dpdk_main;
- u32 cpu_index = os_get_cpu_number ();
-#endif
- vhost_user_intf_t *vui;
uword n_rx_packets = 0;
- int i;
+ u32 cpu_index = os_get_cpu_number ();
- for (i = 0; i < vec_len (vum->vhost_user_interfaces); i++)
- {
- vui = vec_elt_at_index (vum->vhost_user_interfaces, i);
- if (vui->is_up)
- {
-#if DPDK > 0
- if ((i % dm->input_cpu_count) ==
- (cpu_index - dm->input_cpu_first_index))
-#endif
- n_rx_packets += vhost_user_if_input (vm, vum, vui, node);
- }
- }
+
+ vhost_iface_and_queue_t *vhiq;
+ vec_foreach (vhiq, vum->cpus[cpu_index].rx_queues)
+ {
+ vhost_user_intf_t *vui =
+ &vum->vhost_user_interfaces[vhiq->vhost_iface_index];
+ n_rx_packets += vhost_user_if_input (vm, vum, vui, vhiq->qid, node);
+ }
+
+ //TODO: One call might return more than 256 packets here.
+ //But this is supposed to be the vector size.
return n_rx_packets;
}
.n_errors = VHOST_USER_INPUT_FUNC_N_ERROR,
.error_strings = vhost_user_input_func_error_strings,
- .n_next_nodes = VHOST_USER_RX_N_NEXT,
- .next_nodes = {
- [VHOST_USER_RX_NEXT_DROP] = "error-drop",
- [VHOST_USER_RX_NEXT_ETHERNET_INPUT] = "ethernet-input",
- },
+ .n_next_nodes = VNET_DEVICE_INPUT_N_NEXT_NODES,
+ .next_nodes = VNET_DEVICE_INPUT_NEXT_NODES,
};
VLIB_NODE_FUNCTION_MULTIARCH (vhost_user_input_node, vhost_user_input)
{
u32 *buffers = vlib_frame_args (frame);
u32 n_left = 0;
- u16 used_index;
vhost_user_main_t *vum = &vhost_user_main;
uword n_packets = 0;
vnet_interface_output_runtime_t *rd = (void *) node->runtime_data;
vhost_user_intf_t *vui =
vec_elt_at_index (vum->vhost_user_interfaces, rd->dev_instance);
- vhost_user_vring_t *rxvq = &vui->vrings[VHOST_NET_VRING_IDX_RX];
+ u32 qid = ~0;
+ vhost_user_vring_t *rxvq;
u16 qsz_mask;
u8 error = VHOST_USER_TX_FUNC_ERROR_NONE;
+ u32 cpu_index = os_get_cpu_number ();
+ n_left = n_packets = frame->n_vectors;
+ u32 map_guest_hint_desc = 0;
+ u32 map_guest_hint_indirect = 0;
+ u32 *map_guest_hint_p = &map_guest_hint_desc;
- if (PREDICT_FALSE (!vui->is_up))
- goto done2;
-
- if (PREDICT_FALSE
- (!rxvq->desc || !rxvq->avail || vui->sock_errno != 0 || !rxvq->enabled))
+ if (PREDICT_FALSE (!vui->is_up || !vui->admin_up))
{
error = VHOST_USER_TX_FUNC_ERROR_NOT_READY;
- goto done2;
+ goto done3;
}
- if (PREDICT_FALSE (vui->lockp != 0))
- {
- while (__sync_lock_test_and_set (vui->lockp, 1))
- ;
- }
-
- /* only bit 0 of avail.flags is used so we don't want to deal with this
- interface if any other bit is set */
- if (PREDICT_FALSE (rxvq->avail->flags & 0xFFFE))
- {
- error = VHOST_USER_TX_FUNC_ERROR_NOT_READY;
- goto done2;
- }
+ qid =
+ VHOST_VRING_IDX_RX (*vec_elt_at_index (vui->per_cpu_tx_qid, cpu_index));
+ rxvq = &vui->vrings[qid];
+ if (PREDICT_FALSE (vui->use_tx_spinlock))
+ vhost_user_vring_lock (vui, qid);
if (PREDICT_FALSE ((rxvq->avail->idx == rxvq->last_avail_idx)))
{
goto done2;
}
- n_left = n_packets = frame->n_vectors;
- used_index = rxvq->used->idx;
qsz_mask = rxvq->qsz - 1; /* qsz is always power of 2 */
while (n_left > 0)
{
vlib_buffer_t *b0, *current_b0;
- u16 desc_chain_head, desc_current, desc_len;
+ u16 desc_head, desc_index, desc_len;
+ vring_desc_t *desc_table;
void *buffer_addr;
- uword offset;
-
- if (n_left >= 2)
- vlib_prefetch_buffer_with_index (vm, buffers[1], LOAD);
+ u32 buffer_len;
b0 = vlib_get_buffer (vm, buffers[0]);
buffers++;
- n_left--;
if (PREDICT_FALSE (rxvq->last_avail_idx == rxvq->avail->idx))
{
goto done;
}
- desc_current = desc_chain_head =
+ desc_table = rxvq->desc;
+ map_guest_hint_p = &map_guest_hint_desc;
+ desc_head = desc_index =
rxvq->avail->ring[rxvq->last_avail_idx & qsz_mask];
- offset = vui->virtio_net_hdr_sz;
- desc_len = offset;
+ if (rxvq->desc[desc_head].flags & VIRTQ_DESC_F_INDIRECT)
+ {
+ if (PREDICT_FALSE
+ (rxvq->desc[desc_head].len < sizeof (vring_desc_t)))
+ {
+ error = VHOST_USER_TX_FUNC_ERROR_INDIRECT_OVERFLOW;
+ goto done;
+ }
+ if (PREDICT_FALSE
+ (!(desc_table =
+ map_guest_mem (vui, rxvq->desc[desc_index].addr,
+ &map_guest_hint_desc))))
+ {
+ error = VHOST_USER_TX_FUNC_ERROR_MMAP_FAIL;
+ goto done;
+ }
+ desc_index = 0;
+ map_guest_hint_p = &map_guest_hint_indirect;
+ }
+
+ desc_len = vui->virtio_net_hdr_sz;
+
if (PREDICT_FALSE
(!(buffer_addr =
- map_guest_mem (vui, rxvq->desc[desc_current].addr))))
+ map_guest_mem (vui, desc_table[desc_index].addr,
+ map_guest_hint_p))))
{
error = VHOST_USER_TX_FUNC_ERROR_MMAP_FAIL;
goto done;
}
- CLIB_PREFETCH (buffer_addr, clib_min (rxvq->desc[desc_current].len,
- 4 * CLIB_CACHE_LINE_BYTES),
- STORE);
+ buffer_len = desc_table[desc_index].len;
+
+ CLIB_PREFETCH (buffer_addr, CLIB_CACHE_LINE_BYTES, STORE);
virtio_net_hdr_mrg_rxbuf_t *hdr =
(virtio_net_hdr_mrg_rxbuf_t *) buffer_addr;
hdr->hdr.flags = 0;
hdr->hdr.gso_type = 0;
-
- vhost_user_log_dirty_pages (vui, rxvq->desc[desc_current].addr,
- vui->virtio_net_hdr_sz);
-
if (vui->virtio_net_hdr_sz == 12)
hdr->num_buffers = 1;
+ vhost_user_log_dirty_pages (vui, desc_table[desc_index].addr,
+ vui->virtio_net_hdr_sz);
+
u16 bytes_left = b0->current_length;
- buffer_addr += offset;
+ buffer_addr += vui->virtio_net_hdr_sz;
+ buffer_len -= vui->virtio_net_hdr_sz;
current_b0 = b0;
-
- //FIXME: This was in the code but I don't think it is valid
- /*if (PREDICT_FALSE(!vui->is_any_layout && (rxvq->desc[desc_current].flags & VIRTQ_DESC_F_NEXT))) {
- rxvq->desc[desc_current].len = vui->virtio_net_hdr_sz;
- } */
-
while (1)
{
if (!bytes_left)
}
}
- if (rxvq->desc[desc_current].len <= offset)
+ if (buffer_len == 0)
{ //Get new output
- if (rxvq->desc[desc_current].flags & VIRTQ_DESC_F_NEXT)
+ if (desc_table[desc_index].flags & VIRTQ_DESC_F_NEXT)
{
- offset = 0;
- desc_current = rxvq->desc[desc_current].next;
+ //Next one is chained
+ desc_index = desc_table[desc_index].next;
if (PREDICT_FALSE
(!(buffer_addr =
- map_guest_mem (vui, rxvq->desc[desc_current].addr))))
+ map_guest_mem (vui, desc_table[desc_index].addr,
+ map_guest_hint_p))))
{
- used_index -= hdr->num_buffers - 1;
+ rxvq->last_used_idx -= hdr->num_buffers - 1;
rxvq->last_avail_idx -= hdr->num_buffers - 1;
error = VHOST_USER_TX_FUNC_ERROR_MMAP_FAIL;
goto done;
}
+ buffer_len = desc_table[desc_index].len;
}
- else if (vui->virtio_net_hdr_sz == 12)
- { //MRG is available
-
+ else if (vui->virtio_net_hdr_sz == 12) //MRG is available
+ {
//Move from available to used buffer
- rxvq->used->ring[used_index & qsz_mask].id =
- desc_chain_head;
- rxvq->used->ring[used_index & qsz_mask].len = desc_len;
+ rxvq->used->ring[rxvq->last_used_idx & qsz_mask].id =
+ desc_head;
+ rxvq->used->ring[rxvq->last_used_idx & qsz_mask].len =
+ desc_len;
vhost_user_log_dirty_ring (vui, rxvq,
- ring[used_index & qsz_mask]);
+ ring[rxvq->last_used_idx &
+ qsz_mask]);
rxvq->last_avail_idx++;
- used_index++;
+ rxvq->last_used_idx++;
hdr->num_buffers++;
if (PREDICT_FALSE
(rxvq->last_avail_idx == rxvq->avail->idx))
{
//Dequeue queued descriptors for this packet
- used_index -= hdr->num_buffers - 1;
+ rxvq->last_used_idx -= hdr->num_buffers - 1;
rxvq->last_avail_idx -= hdr->num_buffers - 1;
error = VHOST_USER_TX_FUNC_ERROR_PKT_DROP_NOBUF;
goto done;
}
- //Look at next one
- desc_chain_head =
+ desc_table = rxvq->desc;
+ map_guest_hint_p = &map_guest_hint_desc;
+ desc_head = desc_index =
rxvq->avail->ring[rxvq->last_avail_idx & qsz_mask];
- desc_current = desc_chain_head;
- desc_len = 0;
- offset = 0;
+ if (PREDICT_FALSE
+ (rxvq->desc[desc_head].flags & VIRTQ_DESC_F_INDIRECT))
+ {
+ //It is seriously unlikely that a driver will put indirect descriptor
+ //after non-indirect descriptor.
+ if (PREDICT_FALSE
+ (rxvq->desc[desc_head].len < sizeof (vring_desc_t)))
+ {
+ error = VHOST_USER_TX_FUNC_ERROR_INDIRECT_OVERFLOW;
+ goto done;
+ }
+ if (PREDICT_FALSE
+ (!(desc_table =
+ map_guest_mem (vui,
+ rxvq->desc[desc_index].addr,
+ &map_guest_hint_desc))))
+ {
+ error = VHOST_USER_TX_FUNC_ERROR_MMAP_FAIL;
+ goto done;
+ }
+ desc_index = 0;
+ map_guest_hint_p = &map_guest_hint_indirect;
+ }
+
if (PREDICT_FALSE
(!(buffer_addr =
- map_guest_mem (vui, rxvq->desc[desc_current].addr))))
+ map_guest_mem (vui, desc_table[desc_index].addr,
+ map_guest_hint_p))))
{
- //Dequeue queued descriptors for this packet
- used_index -= hdr->num_buffers - 1;
- rxvq->last_avail_idx -= hdr->num_buffers - 1;
error = VHOST_USER_TX_FUNC_ERROR_MMAP_FAIL;
goto done;
}
+ buffer_len = desc_table[desc_index].len;
+ CLIB_PREFETCH (buffer_addr, CLIB_CACHE_LINE_BYTES, STORE);
}
else
{
- error = VHOST_USER_TX_FUNC_ERROR_PKT_DROP_NOBUF;
+ error = VHOST_USER_TX_FUNC_ERROR_PKT_DROP_NOMRG;
goto done;
}
}
- u16 bytes_to_copy =
- bytes_left >
- (rxvq->desc[desc_current].len -
- offset) ? (rxvq->desc[desc_current].len - offset) : bytes_left;
+ u16 bytes_to_copy = bytes_left;
+ bytes_to_copy =
+ (bytes_to_copy > buffer_len) ? buffer_len : bytes_to_copy;
clib_memcpy (buffer_addr,
vlib_buffer_get_current (current_b0) +
current_b0->current_length - bytes_left,
bytes_to_copy);
vhost_user_log_dirty_pages (vui,
- rxvq->desc[desc_current].addr + offset,
+ desc_table[desc_index].addr +
+ desc_table[desc_index].len -
+ bytes_left - bytes_to_copy,
bytes_to_copy);
+
+ CLIB_PREFETCH (rxvq, sizeof (*rxvq), STORE);
bytes_left -= bytes_to_copy;
- offset += bytes_to_copy;
+ buffer_len -= bytes_to_copy;
buffer_addr += bytes_to_copy;
desc_len += bytes_to_copy;
}
//Move from available to used ring
- rxvq->used->ring[used_index & qsz_mask].id = desc_chain_head;
- rxvq->used->ring[used_index & qsz_mask].len = desc_len;
- vhost_user_log_dirty_ring (vui, rxvq, ring[used_index & qsz_mask]);
+ rxvq->used->ring[rxvq->last_used_idx & qsz_mask].id = desc_head;
+ rxvq->used->ring[rxvq->last_used_idx & qsz_mask].len = desc_len;
+ vhost_user_log_dirty_ring (vui, rxvq,
+ ring[rxvq->last_used_idx & qsz_mask]);
rxvq->last_avail_idx++;
- used_index++;
+ rxvq->last_used_idx++;
+
+ n_left--; //At the end for error counting when 'goto done' is invoked
}
done:
CLIB_MEMORY_BARRIER ();
- rxvq->used->idx = used_index;
+ rxvq->used->idx = rxvq->last_used_idx;
vhost_user_log_dirty_ring (vui, rxvq, idx);
/* interrupt (call) handling */
- if ((rxvq->callfd > 0) && !(rxvq->avail->flags & 1))
+ if ((rxvq->callfd > -1) && !(rxvq->avail->flags & 1))
{
rxvq->n_since_last_int += n_packets - n_left;
}
done2:
+ vhost_user_vring_unlock (vui, qid);
- if (PREDICT_FALSE (vui->lockp != 0))
- *vui->lockp = 0;
-
+done3:
if (PREDICT_FALSE (n_left && error != VHOST_USER_TX_FUNC_ERROR_NONE))
{
vlib_error_count (vm, node->node_index, error, n_left);
getsockopt (vui->unix_fd, SOL_SOCKET, SO_ERROR, &error, &len);
if (retval)
- vhost_user_if_disconnect (vui);
+ {
+ DBG_SOCK ("getsockopt returned %d", retval);
+ vhost_user_if_disconnect (vui);
+ }
}
}
}
// vui was not retrieved from inactive ifaces - create new
if (!vui)
vec_add2 (vum->vhost_user_interfaces, vui, 1);
+
return vui;
}
{
vnet_sw_interface_t *sw;
sw = vnet_get_hw_sw_interface (vnm, vui->hw_if_index);
- vlib_thread_main_t *tm = vlib_get_thread_main ();
int q;
vui->unix_fd = sockfd;
vui->sw_if_index = sw->sw_if_index;
- vui->num_vrings = 2;
vui->sock_is_server = is_server;
strncpy (vui->sock_filename, sock_filename,
ARRAY_LEN (vui->sock_filename) - 1);
vui->unix_file_index = ~0;
vui->log_base_addr = 0;
- for (q = 0; q < 2; q++)
- {
- vui->vrings[q].enabled = 0;
- }
+ for (q = 0; q < VHOST_VRING_MAX_N; q++)
+ vhost_user_vring_init (vui, q);
vnet_hw_interface_set_flags (vnm, vui->hw_if_index, 0);
if (sw_if_index)
*sw_if_index = vui->sw_if_index;
- if (tm->n_vlib_mains > 1)
+ for (q = 0; q < VHOST_VRING_MAX_N; q++)
{
- vui->lockp = clib_mem_alloc_aligned (CLIB_CACHE_LINE_BYTES,
- CLIB_CACHE_LINE_BYTES);
- memset ((void *) vui->lockp, 0, CLIB_CACHE_LINE_BYTES);
+ vui->vring_locks[q] = clib_mem_alloc_aligned (CLIB_CACHE_LINE_BYTES,
+ CLIB_CACHE_LINE_BYTES);
+ memset ((void *) vui->vring_locks[q], 0, CLIB_CACHE_LINE_BYTES);
}
+
+ vec_validate (vui->per_cpu_tx_qid,
+ vlib_get_thread_main ()->n_vlib_mains - 1);
+ vhost_user_tx_thread_placement (vui);
}
// register vui and start polling on it
vhost_user_vui_register (vlib_main_t * vm, vhost_user_intf_t * vui)
{
vhost_user_main_t *vum = &vhost_user_main;
-#if DPDK > 0
- dpdk_main_t *dm = &dpdk_main;
int cpu_index;
vlib_thread_main_t *tm = vlib_get_thread_main ();
-#endif
hash_set (vum->vhost_user_interface_index_by_listener_fd, vui->unix_fd,
vui - vum->vhost_user_interfaces);
vui - vum->vhost_user_interfaces);
/* start polling */
-#if DPDK > 0
- cpu_index = dm->input_cpu_first_index +
- (vui - vum->vhost_user_interfaces) % dm->input_cpu_count;
+ cpu_index = vum->input_cpu_first_index +
+ (vui - vum->vhost_user_interfaces) % vum->input_cpu_count;
if (tm->n_vlib_mains == 1)
-#endif
vlib_node_set_state (vm, vhost_user_input_node.index,
VLIB_NODE_STATE_POLLING);
-#if DPDK > 0
else
vlib_node_set_state (vlib_mains[cpu_index], vhost_user_input_node.index,
VLIB_NODE_STATE_POLLING);
-#endif
/* tell process to start polling for sockets */
vlib_process_signal_event (vm, vhost_user_process_node.index, 0, 0);
u8 *sock_filename = NULL;
u32 sw_if_index;
u8 is_server = 0;
- u64 feature_mask = (u64) ~ 0;
+ u64 feature_mask = (u64) ~ (0ULL);
u8 renumber = 0;
u32 custom_dev_instance = ~0;
u8 hwaddr[6];
vhost_user_intf_t *vui;
u32 hw_if_index, *hw_if_indices = 0;
vnet_hw_interface_t *hi;
+ vhost_cpu_t *vhc;
+ vhost_iface_and_queue_t *vhiq;
+ u32 ci;
+
int i, j, q;
int show_descr = 0;
struct feat_struct
{.str = NULL}
};
+#define foreach_protocol_feature \
+ _(VHOST_USER_PROTOCOL_F_MQ) \
+ _(VHOST_USER_PROTOCOL_F_LOG_SHMFD)
+
+ static struct feat_struct proto_feat_array[] = {
+#define _(s) { .str = #s, .bit = s},
+ foreach_protocol_feature
+#undef _
+ {.str = NULL}
+ };
+
while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
{
if (unformat
(input, "%U", unformat_vnet_hw_interface, vnm, &hw_if_index))
{
vec_add1 (hw_if_indices, hw_if_index);
- vlib_cli_output (vm, "add %d", hw_if_index);
}
else if (unformat (input, "descriptors") || unformat (input, "desc"))
show_descr = 1;
}
}
vlib_cli_output (vm, "Virtio vhost-user interfaces");
- vlib_cli_output (vm, "Global:\n coalesce frames %d time %e\n\n",
+ vlib_cli_output (vm, "Global:\n coalesce frames %d time %e",
vum->coalesce_frames, vum->coalesce_time);
for (i = 0; i < vec_len (hw_if_indices); i++)
vlib_cli_output (vm, "Interface: %s (ifindex %d)",
hi->name, hw_if_indices[i]);
- vlib_cli_output (vm, "virtio_net_hdr_sz %d\n features (0x%llx): \n",
- vui->virtio_net_hdr_sz, vui->features);
+ vlib_cli_output (vm, "virtio_net_hdr_sz %d\n"
+ " features mask (0x%llx): \n"
+ " features (0x%llx): \n",
+ vui->virtio_net_hdr_sz, vui->feature_mask,
+ vui->features);
feat_entry = (struct feat_struct *) &feat_array;
while (feat_entry->str)
{
- if (vui->features & (1 << feat_entry->bit))
+ if (vui->features & (1ULL << feat_entry->bit))
vlib_cli_output (vm, " %s (%d)", feat_entry->str,
feat_entry->bit);
feat_entry++;
}
- vlib_cli_output (vm, "\n");
+ vlib_cli_output (vm, " protocol features (0x%llx)",
+ vui->protocol_features);
+ feat_entry = (struct feat_struct *) &proto_feat_array;
+ while (feat_entry->str)
+ {
+ if (vui->protocol_features & (1ULL << feat_entry->bit))
+ vlib_cli_output (vm, " %s (%d)", feat_entry->str,
+ feat_entry->bit);
+ feat_entry++;
+ }
+ vlib_cli_output (vm, "\n");
vlib_cli_output (vm, " socket filename %s type %s errno \"%s\"\n\n",
vui->sock_filename,
vui->sock_is_server ? "server" : "client",
strerror (vui->sock_errno));
+ vlib_cli_output (vm, " rx placement: ");
+ vec_foreach (vhc, vum->cpus)
+ {
+ vec_foreach (vhiq, vhc->rx_queues)
+ {
+ if (vhiq->vhost_iface_index == vui - vum->vhost_user_interfaces)
+ vlib_cli_output (vm, " thread %d on vring %d\n",
+ vhc - vum->cpus, VHOST_VRING_IDX_TX (vhiq->qid));
+ }
+ }
+
+ vlib_cli_output (vm, " tx placement: %s\n",
+ vui->use_tx_spinlock ? "spin-lock" : "lock-free");
+
+ vec_foreach_index (ci, vui->per_cpu_tx_qid)
+ {
+ vlib_cli_output (vm, " thread %d on vring %d\n", ci,
+ VHOST_VRING_IDX_RX (vui->per_cpu_tx_qid[ci]));
+ }
+
+ vlib_cli_output (vm, "\n");
+
vlib_cli_output (vm, " Memory regions (total %d)\n", vui->nregions);
if (vui->nregions)
vui->regions[j].mmap_offset,
pointer_to_uword (vui->region_mmap_addr[j]));
}
- for (q = 0; q < vui->num_vrings; q++)
+ for (q = 0; q < VHOST_VRING_MAX_N; q++)
{
- vlib_cli_output (vm, "\n Virtqueue %d\n", q);
+ if (!vui->vrings[q].started)
+ continue;
+
+ vlib_cli_output (vm, "\n Virtqueue %d (%s%s)\n", q,
+ (q & 1) ? "RX" : "TX",
+ vui->vrings[q].enabled ? "" : " disabled");
vlib_cli_output (vm,
" qsz %d last_avail_idx %d last_used_idx %d\n",
" ===== ================== ===== ====== ===== ==================\n");
for (j = 0; j < vui->vrings[q].qsz; j++)
{
+ u32 mem_hint = 0;
vlib_cli_output (vm,
" %-5d 0x%016lx %-5d 0x%04x %-5d 0x%016lx\n",
j, vui->vrings[q].desc[j].addr,
vui->vrings[q].desc[j].next,
pointer_to_uword (map_guest_mem
(vui,
- vui->vrings[q].
- desc[j].addr)));
+ vui->vrings[q].desc[j].
+ addr, &mem_hint)));
}
}
}
* CLI functions
*/
-#if DPDK == 0
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (vhost_user_connect_command, static) = {
.path = "create vhost-user",
.function = show_vhost_user_command_fn,
};
/* *INDENT-ON* */
-#endif
static clib_error_t *
vhost_user_config (vlib_main_t * vm, unformat_input_t * input)
}
}
+static clib_error_t *
+vhost_thread_command_fn (vlib_main_t * vm,
+ unformat_input_t * input, vlib_cli_command_t * cmd)
+{
+ unformat_input_t _line_input, *line_input = &_line_input;
+ u32 worker_thread_index;
+ u32 sw_if_index;
+ u8 del = 0;
+ int rv;
+
+ /* Get a line of input. */
+ if (!unformat_user (input, unformat_line_input, line_input))
+ return 0;
+
+ if (!unformat
+ (line_input, "%U %d", unformat_vnet_sw_interface, vnet_get_main (),
+ &sw_if_index, &worker_thread_index))
+ {
+ unformat_free (line_input);
+ return clib_error_return (0, "unknown input `%U'",
+ format_unformat_error, input);
+ }
+
+ if (unformat (line_input, "del"))
+ del = 1;
+
+ if ((rv =
+ vhost_user_thread_placement (sw_if_index, worker_thread_index, del)))
+ return clib_error_return (0, "vhost_user_thread_placement returned %d",
+ rv);
+ return 0;
+}
+
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (vhost_user_thread_command, static) = {
+ .path = "vhost thread",
+ .short_help = "vhost thread <iface> <worker-index> [del]",
+ .function = vhost_thread_command_fn,
+};
+/* *INDENT-ON* */
+
/*
* fd.io coding-style-patch-verification: ON
*
Code Review / vpp.git / blobdiff