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-rw-r--r--src/vnet/devices/virtio/FEATURE.yaml2
-rw-r--r--src/vnet/devices/virtio/vhost_user.api6
-rw-r--r--src/vnet/devices/virtio/vhost_user.c311
-rw-r--r--src/vnet/devices/virtio/vhost_user.h63
-rw-r--r--src/vnet/devices/virtio/vhost_user_api.c20
-rw-r--r--src/vnet/devices/virtio/vhost_user_inline.h79
-rw-r--r--src/vnet/devices/virtio/vhost_user_input.c858
-rw-r--r--src/vnet/devices/virtio/vhost_user_output.c421
8 files changed, 1604 insertions, 156 deletions
diff --git a/src/vnet/devices/virtio/FEATURE.yaml b/src/vnet/devices/virtio/FEATURE.yaml
index de449c866e5..b446a559403 100644
--- a/src/vnet/devices/virtio/FEATURE.yaml
+++ b/src/vnet/devices/virtio/FEATURE.yaml
@@ -7,7 +7,7 @@ features:
- device mode to emulate vhost-user interface presented to VPP from the
guest VM.
- support multi-queue, GSO, checksum offload, indirect descriptor,
- and jumbo frame.
+ jumbo frame, and packed ring.
description: "Virtio v1.0 implementation"
missing:
- API dump filtering by sw_if_index
diff --git a/src/vnet/devices/virtio/vhost_user.api b/src/vnet/devices/virtio/vhost_user.api
index 9b057552c00..127b0a27fc7 100644
--- a/src/vnet/devices/virtio/vhost_user.api
+++ b/src/vnet/devices/virtio/vhost_user.api
@@ -13,7 +13,7 @@
* limitations under the License.
*/
-option version = "4.0.0";
+option version = "4.0.1";
import "vnet/interface_types.api";
import "vnet/ethernet/ethernet_types.api";
@@ -27,6 +27,7 @@ import "vnet/devices/virtio/virtio_types.api";
@param disable_mrg_rxbuf - disable the use of merge receive buffers
@param disable_indirect_desc - disable the use of indirect descriptors which driver can use
@param enable_gso - enable gso support (default 0)
+ @param enable_packed - enable packed ring support (default 0)
@param mac_address - hardware address to use if 'use_custom_mac' is set
*/
define create_vhost_user_if
@@ -39,6 +40,7 @@ define create_vhost_user_if
bool disable_mrg_rxbuf;
bool disable_indirect_desc;
bool enable_gso;
+ bool enable_packed;
u32 custom_dev_instance;
bool use_custom_mac;
vl_api_mac_address_t mac_address;
@@ -62,6 +64,7 @@ define create_vhost_user_if_reply
@param is_server - our side is socket server
@param sock_filename - unix socket filename, used to speak with frontend
@param enable_gso - enable gso support (default 0)
+ @param enable_packed - enable packed ring support (default 0)
*/
autoreply define modify_vhost_user_if
{
@@ -72,6 +75,7 @@ autoreply define modify_vhost_user_if
string sock_filename[256];
bool renumber;
bool enable_gso;
+ bool enable_packed;
u32 custom_dev_instance;
};
diff --git a/src/vnet/devices/virtio/vhost_user.c b/src/vnet/devices/virtio/vhost_user.c
index 7094a00fb33..d24e516a93c 100644
--- a/src/vnet/devices/virtio/vhost_user.c
+++ b/src/vnet/devices/virtio/vhost_user.c
@@ -466,6 +466,8 @@ vhost_user_socket_read (clib_file_t * uf)
if (vui->enable_gso)
msg.u64 |= FEATURE_VIRTIO_NET_F_HOST_GUEST_TSO_FEATURE_BITS;
+ if (vui->enable_packed)
+ msg.u64 |= (1ULL << FEAT_VIRTIO_F_RING_PACKED);
msg.size = sizeof (msg.u64);
vu_log_debug (vui, "if %d msg VHOST_USER_GET_FEATURES - reply "
@@ -655,7 +657,11 @@ vhost_user_socket_read (clib_file_t * uf)
vui->vrings[msg.state.index].used->idx;
/* tell driver that we don't want interrupts */
- vui->vrings[msg.state.index].used->flags = VRING_USED_F_NO_NOTIFY;
+ if (vhost_user_is_packed_ring_supported (vui))
+ vui->vrings[msg.state.index].used_event->flags =
+ VRING_EVENT_F_DISABLE;
+ else
+ vui->vrings[msg.state.index].used->flags = VRING_USED_F_NO_NOTIFY;
vlib_worker_thread_barrier_release (vm);
vhost_user_update_iface_state (vui);
break;
@@ -762,10 +768,47 @@ vhost_user_socket_read (clib_file_t * uf)
break;
case VHOST_USER_SET_VRING_BASE:
- vu_log_debug (vui, "if %d msg VHOST_USER_SET_VRING_BASE idx %d num %d",
+ vu_log_debug (vui,
+ "if %d msg VHOST_USER_SET_VRING_BASE idx %d num 0x%x",
vui->hw_if_index, msg.state.index, msg.state.num);
vlib_worker_thread_barrier_sync (vm);
vui->vrings[msg.state.index].last_avail_idx = msg.state.num;
+ if (vhost_user_is_packed_ring_supported (vui))
+ {
+ /*
+ * 0 1 2 3
+ * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | last avail idx | | last used idx | |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * ^ ^
+ * | |
+ * avail wrap counter used wrap counter
+ */
+ /* last avail idx at bit 0-14. */
+ vui->vrings[msg.state.index].last_avail_idx =
+ msg.state.num & 0x7fff;
+ /* avail wrap counter at bit 15 */
+ vui->vrings[msg.state.index].avail_wrap_counter =
+ ! !(msg.state.num & (1 << 15));
+
+ /*
+ * Although last_used_idx is passed in the upper 16 bits in qemu
+ * implementation, in practice, last_avail_idx and last_used_idx are
+ * usually the same. As a result, DPDK does not bother to pass us
+ * last_used_idx. The spec is not clear on thex coding. I figured it
+ * out by reading the qemu code. So let's just read last_avail_idx
+ * and set last_used_idx equals to last_avail_idx.
+ */
+ vui->vrings[msg.state.index].last_used_idx =
+ vui->vrings[msg.state.index].last_avail_idx;
+ vui->vrings[msg.state.index].used_wrap_counter =
+ vui->vrings[msg.state.index].avail_wrap_counter;
+
+ if (vui->vrings[msg.state.index].avail_wrap_counter == 1)
+ vui->vrings[msg.state.index].avail_wrap_counter =
+ VIRTQ_DESC_F_AVAIL;
+ }
vlib_worker_thread_barrier_release (vm);
break;
@@ -784,6 +827,15 @@ vhost_user_socket_read (clib_file_t * uf)
* closing the vring also initializes the vring last_avail_idx
*/
msg.state.num = vui->vrings[msg.state.index].last_avail_idx;
+ if (vhost_user_is_packed_ring_supported (vui))
+ {
+ msg.state.num =
+ (vui->vrings[msg.state.index].last_avail_idx & 0x7fff) |
+ (! !vui->vrings[msg.state.index].avail_wrap_counter << 15);
+ msg.state.num |=
+ ((vui->vrings[msg.state.index].last_used_idx & 0x7fff) |
+ (! !vui->vrings[msg.state.index].used_wrap_counter << 15)) << 16;
+ }
msg.flags |= 4;
msg.size = sizeof (msg.state);
@@ -793,7 +845,8 @@ vhost_user_socket_read (clib_file_t * uf)
*/
vhost_user_vring_close (vui, msg.state.index);
vlib_worker_thread_barrier_release (vm);
- vu_log_debug (vui, "if %d msg VHOST_USER_GET_VRING_BASE idx %d num %d",
+ vu_log_debug (vui,
+ "if %d msg VHOST_USER_GET_VRING_BASE idx %d num 0x%x",
vui->hw_if_index, msg.state.index, msg.state.num);
n =
send (uf->file_descriptor, &msg, VHOST_USER_MSG_HDR_SZ + msg.size, 0);
@@ -1440,7 +1493,8 @@ vhost_user_vui_init (vnet_main_t * vnm,
vhost_user_intf_t * vui,
int server_sock_fd,
const char *sock_filename,
- u64 feature_mask, u32 * sw_if_index, u8 enable_gso)
+ u64 feature_mask, u32 * sw_if_index, u8 enable_gso,
+ u8 enable_packed)
{
vnet_sw_interface_t *sw;
int q;
@@ -1472,6 +1526,7 @@ vhost_user_vui_init (vnet_main_t * vnm,
vui->log_base_addr = 0;
vui->if_index = vui - vum->vhost_user_interfaces;
vui->enable_gso = enable_gso;
+ vui->enable_packed = enable_packed;
/*
* enable_gso takes precedence over configurable feature mask if there
* is a clash.
@@ -1519,7 +1574,7 @@ vhost_user_create_if (vnet_main_t * vnm, vlib_main_t * vm,
u32 * sw_if_index,
u64 feature_mask,
u8 renumber, u32 custom_dev_instance, u8 * hwaddr,
- u8 enable_gso)
+ u8 enable_gso, u8 enable_packed)
{
vhost_user_intf_t *vui = NULL;
u32 sw_if_idx = ~0;
@@ -1560,7 +1615,7 @@ vhost_user_create_if (vnet_main_t * vnm, vlib_main_t * vm,
vlib_worker_thread_barrier_release (vm);
vhost_user_vui_init (vnm, vui, server_sock_fd, sock_filename,
- feature_mask, &sw_if_idx, enable_gso);
+ feature_mask, &sw_if_idx, enable_gso, enable_packed);
vnet_sw_interface_set_mtu (vnm, vui->sw_if_index, 9000);
vhost_user_rx_thread_placement (vui, 1);
@@ -1582,7 +1637,7 @@ vhost_user_modify_if (vnet_main_t * vnm, vlib_main_t * vm,
u8 is_server,
u32 sw_if_index,
u64 feature_mask, u8 renumber, u32 custom_dev_instance,
- u8 enable_gso)
+ u8 enable_gso, u8 enable_packed)
{
vhost_user_main_t *vum = &vhost_user_main;
vhost_user_intf_t *vui = NULL;
@@ -1619,7 +1674,8 @@ vhost_user_modify_if (vnet_main_t * vnm, vlib_main_t * vm,
vhost_user_term_if (vui);
vhost_user_vui_init (vnm, vui, server_sock_fd,
- sock_filename, feature_mask, &sw_if_idx, enable_gso);
+ sock_filename, feature_mask, &sw_if_idx, enable_gso,
+ enable_packed);
if (renumber)
vnet_interface_name_renumber (sw_if_idx, custom_dev_instance);
@@ -1645,7 +1701,7 @@ vhost_user_connect_command_fn (vlib_main_t * vm,
u8 hwaddr[6];
u8 *hw = NULL;
clib_error_t *error = NULL;
- u8 enable_gso = 0;
+ u8 enable_gso = 0, enable_packed = 0;
/* Get a line of input. */
if (!unformat_user (input, unformat_line_input, line_input))
@@ -1653,6 +1709,8 @@ vhost_user_connect_command_fn (vlib_main_t * vm,
/* GSO feature is disable by default */
feature_mask &= ~FEATURE_VIRTIO_NET_F_HOST_GUEST_TSO_FEATURE_BITS;
+ /* packed-ring feature is disable by default */
+ feature_mask &= ~(1ULL << FEAT_VIRTIO_F_RING_PACKED);
while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
{
if (unformat (line_input, "socket %s", &sock_filename))
@@ -1661,6 +1719,8 @@ vhost_user_connect_command_fn (vlib_main_t * vm,
is_server = 1;
else if (unformat (line_input, "gso"))
enable_gso = 1;
+ else if (unformat (line_input, "packed"))
+ enable_packed = 1;
else if (unformat (line_input, "feature-mask 0x%llx", &feature_mask))
;
else
@@ -1685,7 +1745,7 @@ vhost_user_connect_command_fn (vlib_main_t * vm,
if ((rv = vhost_user_create_if (vnm, vm, (char *) sock_filename,
is_server, &sw_if_index, feature_mask,
renumber, custom_dev_instance, hw,
- enable_gso)))
+ enable_gso, enable_packed)))
{
error = clib_error_return (0, "vhost_user_create_if returned %d", rv);
goto done;
@@ -1799,6 +1859,186 @@ vhost_user_dump_ifs (vnet_main_t * vnm, vlib_main_t * vm,
return rv;
}
+static u8 *
+format_vhost_user_desc (u8 * s, va_list * args)
+{
+ char *fmt = va_arg (*args, char *);
+ vhost_user_intf_t *vui = va_arg (*args, vhost_user_intf_t *);
+ vring_desc_t *desc_table = va_arg (*args, vring_desc_t *);
+ int idx = va_arg (*args, int);
+ u32 *mem_hint = va_arg (*args, u32 *);
+
+ s = format (s, fmt, idx, desc_table[idx].addr, desc_table[idx].len,
+ desc_table[idx].flags, desc_table[idx].next,
+ pointer_to_uword (map_guest_mem (vui, desc_table[idx].addr,
+ mem_hint)));
+ return s;
+}
+
+static u8 *
+format_vhost_user_vring (u8 * s, va_list * args)
+{
+ char *fmt = va_arg (*args, char *);
+ vhost_user_intf_t *vui = va_arg (*args, vhost_user_intf_t *);
+ int q = va_arg (*args, int);
+
+ s = format (s, fmt, vui->vrings[q].avail->flags, vui->vrings[q].avail->idx,
+ vui->vrings[q].used->flags, vui->vrings[q].used->idx);
+ return s;
+}
+
+static void
+vhost_user_show_fds (vlib_main_t * vm, vhost_user_intf_t * vui, int q)
+{
+ int kickfd = UNIX_GET_FD (vui->vrings[q].kickfd_idx);
+ int callfd = UNIX_GET_FD (vui->vrings[q].callfd_idx);
+
+ vlib_cli_output (vm, " kickfd %d callfd %d errfd %d\n", kickfd, callfd,
+ vui->vrings[q].errfd);
+}
+
+static void
+vhost_user_show_desc (vlib_main_t * vm, vhost_user_intf_t * vui, int q,
+ int show_descr, int show_verbose)
+{
+ int j;
+ u32 mem_hint = 0;
+ u32 idx;
+ u32 n_entries;
+ vring_desc_t *desc_table;
+
+ if (vui->vrings[q].avail && vui->vrings[q].used)
+ vlib_cli_output (vm, "%U", format_vhost_user_vring,
+ " avail.flags %x avail.idx %d used.flags %x used.idx %d\n",
+ vui, q);
+
+ vhost_user_show_fds (vm, vui, q);
+
+ if (show_descr)
+ {
+ vlib_cli_output (vm, "\n descriptor table:\n");
+ vlib_cli_output (vm,
+ " slot addr len flags next "
+ "user_addr\n");
+ vlib_cli_output (vm,
+ " ===== ================== ===== ====== ===== "
+ "==================\n");
+ for (j = 0; j < vui->vrings[q].qsz_mask + 1; j++)
+ {
+ desc_table = vui->vrings[q].desc;
+ vlib_cli_output (vm, "%U", format_vhost_user_desc,
+ " %-5d 0x%016lx %-5d 0x%04x %-5d 0x%016lx\n", vui,
+ desc_table, j, &mem_hint);
+ if (show_verbose && (desc_table[j].flags & VIRTQ_DESC_F_INDIRECT))
+ {
+ n_entries = desc_table[j].len / sizeof (vring_desc_t);
+ desc_table = map_guest_mem (vui, desc_table[j].addr, &mem_hint);
+ if (desc_table)
+ {
+ for (idx = 0; idx < clib_min (20, n_entries); idx++)
+ {
+ vlib_cli_output
+ (vm, "%U", format_vhost_user_desc,
+ "> %-4u 0x%016lx %-5u 0x%04x %-5u 0x%016lx\n", vui,
+ desc_table, idx, &mem_hint);
+ }
+ if (n_entries >= 20)
+ vlib_cli_output (vm, "Skip displaying entries 20...%u\n",
+ n_entries);
+ }
+ }
+ }
+ }
+}
+
+static u8 *
+format_vhost_user_packed_desc (u8 * s, va_list * args)
+{
+ char *fmt = va_arg (*args, char *);
+ vhost_user_intf_t *vui = va_arg (*args, vhost_user_intf_t *);
+ vring_packed_desc_t *desc_table = va_arg (*args, vring_packed_desc_t *);
+ int idx = va_arg (*args, int);
+ u32 *mem_hint = va_arg (*args, u32 *);
+
+ s = format (s, fmt, idx, desc_table[idx].addr, desc_table[idx].len,
+ desc_table[idx].flags, desc_table[idx].id,
+ pointer_to_uword (map_guest_mem (vui, desc_table[idx].addr,
+ mem_hint)));
+ return s;
+}
+
+static u8 *
+format_vhost_user_vring_packed (u8 * s, va_list * args)
+{
+ char *fmt = va_arg (*args, char *);
+ vhost_user_intf_t *vui = va_arg (*args, vhost_user_intf_t *);
+ int q = va_arg (*args, int);
+
+ s = format (s, fmt, vui->vrings[q].avail_event->flags,
+ vui->vrings[q].avail_event->off_wrap,
+ vui->vrings[q].used_event->flags,
+ vui->vrings[q].used_event->off_wrap,
+ vui->vrings[q].avail_wrap_counter,
+ vui->vrings[q].used_wrap_counter);
+ return s;
+}
+
+static void
+vhost_user_show_desc_packed (vlib_main_t * vm, vhost_user_intf_t * vui, int q,
+ int show_descr, int show_verbose)
+{
+ int j;
+ u32 mem_hint = 0;
+ u32 idx;
+ u32 n_entries;
+ vring_packed_desc_t *desc_table;
+
+ if (vui->vrings[q].avail_event && vui->vrings[q].used_event)
+ vlib_cli_output (vm, "%U", format_vhost_user_vring_packed,
+ " avail_event.flags %x avail_event.off_wrap %u "
+ "used_event.flags %x used_event.off_wrap %u\n"
+ " avail wrap counter %u, used wrap counter %u\n",
+ vui, q);
+
+ vhost_user_show_fds (vm, vui, q);
+
+ if (show_descr)
+ {
+ vlib_cli_output (vm, "\n descriptor table:\n");
+ vlib_cli_output (vm,
+ " slot addr len flags id "
+ "user_addr\n");
+ vlib_cli_output (vm,
+ " ===== ================== ===== ====== ===== "
+ "==================\n");
+ for (j = 0; j < vui->vrings[q].qsz_mask + 1; j++)
+ {
+ desc_table = vui->vrings[q].packed_desc;
+ vlib_cli_output (vm, "%U", format_vhost_user_packed_desc,
+ " %-5u 0x%016lx %-5u 0x%04x %-5u 0x%016lx\n", vui,
+ desc_table, j, &mem_hint);
+ if (show_verbose && (desc_table[j].flags & VIRTQ_DESC_F_INDIRECT))
+ {
+ n_entries = desc_table[j].len >> 4;
+ desc_table = map_guest_mem (vui, desc_table[j].addr, &mem_hint);
+ if (desc_table)
+ {
+ for (idx = 0; idx < clib_min (20, n_entries); idx++)
+ {
+ vlib_cli_output
+ (vm, "%U", format_vhost_user_packed_desc,
+ "> %-4u 0x%016lx %-5u 0x%04x %-5u 0x%016lx\n", vui,
+ desc_table, idx, &mem_hint);
+ }
+ if (n_entries >= 20)
+ vlib_cli_output (vm, "Skip displaying entries 20...%u\n",
+ n_entries);
+ }
+ }
+ }
+ }
+}
+
clib_error_t *
show_vhost_user_command_fn (vlib_main_t * vm,
unformat_input_t * input,
@@ -1814,6 +2054,7 @@ show_vhost_user_command_fn (vlib_main_t * vm,
u32 ci;
int i, j, q;
int show_descr = 0;
+ int show_verbose = 0;
struct feat_struct
{
u8 bit;
@@ -1855,6 +2096,8 @@ show_vhost_user_command_fn (vlib_main_t * vm,
}
else if (unformat (input, "descriptors") || unformat (input, "desc"))
show_descr = 1;
+ else if (unformat (input, "verbose"))
+ show_verbose = 1;
else
{
error = clib_error_return (0, "unknown input `%U'",
@@ -1884,6 +2127,8 @@ show_vhost_user_command_fn (vlib_main_t * vm,
hw_if_indices[i]);
if (vui->enable_gso)
vlib_cli_output (vm, " GSO enable");
+ if (vui->enable_packed)
+ vlib_cli_output (vm, " Packed ring enable");
vlib_cli_output (vm, "virtio_net_hdr_sz %d\n"
" features mask (0x%llx): \n"
@@ -1985,41 +2230,11 @@ show_vhost_user_command_fn (vlib_main_t * vm,
vui->vrings[q].last_avail_idx,
vui->vrings[q].last_used_idx);
- if (vui->vrings[q].avail && vui->vrings[q].used)
- vlib_cli_output (vm,
- " avail.flags %x avail.idx %d used.flags %x used.idx %d\n",
- vui->vrings[q].avail->flags,
- vui->vrings[q].avail->idx,
- vui->vrings[q].used->flags,
- vui->vrings[q].used->idx);
-
- int kickfd = UNIX_GET_FD (vui->vrings[q].kickfd_idx);
- int callfd = UNIX_GET_FD (vui->vrings[q].callfd_idx);
- vlib_cli_output (vm, " kickfd %d callfd %d errfd %d\n",
- kickfd, callfd, vui->vrings[q].errfd);
-
- if (show_descr)
- {
- vlib_cli_output (vm, "\n descriptor table:\n");
- vlib_cli_output (vm,
- " id addr len flags next user_addr\n");
- vlib_cli_output (vm,
- " ===== ================== ===== ====== ===== ==================\n");
- for (j = 0; j < vui->vrings[q].qsz_mask + 1; 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].len,
- vui->vrings[q].desc[j].flags,
- vui->vrings[q].desc[j].next,
- pointer_to_uword (map_guest_mem
- (vui,
- vui->vrings[q].desc[j].
- addr, &mem_hint)));
- }
- }
+ if (vhost_user_is_packed_ring_supported (vui))
+ vhost_user_show_desc_packed (vm, vui, q, show_descr,
+ show_verbose);
+ else
+ vhost_user_show_desc (vm, vui, q, show_descr, show_verbose);
}
vlib_cli_output (vm, "\n");
}
@@ -2090,7 +2305,8 @@ done:
VLIB_CLI_COMMAND (vhost_user_connect_command, static) = {
.path = "create vhost-user",
.short_help = "create vhost-user socket <socket-filename> [server] "
- "[feature-mask <hex>] [hwaddr <mac-addr>] [renumber <dev_instance>] [gso]",
+ "[feature-mask <hex>] [hwaddr <mac-addr>] [renumber <dev_instance>] [gso] "
+ "[packed]",
.function = vhost_user_connect_command_fn,
.is_mp_safe = 1,
};
@@ -2251,7 +2467,8 @@ VLIB_CLI_COMMAND (vhost_user_delete_command, static) = {
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (show_vhost_user_command, static) = {
.path = "show vhost-user",
- .short_help = "show vhost-user [<interface> [<interface> [..]]] [descriptors]",
+ .short_help = "show vhost-user [<interface> [<interface> [..]]] "
+ "[[descriptors] [verbose]]",
.function = show_vhost_user_command_fn,
};
/* *INDENT-ON* */
diff --git a/src/vnet/devices/virtio/vhost_user.h b/src/vnet/devices/virtio/vhost_user.h
index f14f26a71e4..b86f42e70e8 100644
--- a/src/vnet/devices/virtio/vhost_user.h
+++ b/src/vnet/devices/virtio/vhost_user.h
@@ -25,8 +25,15 @@
#define VHOST_USER_VRING_NOFD_MASK 0x100
#define VIRTQ_DESC_F_NEXT 1
+#define VIRTQ_DESC_F_WRITE 2
#define VIRTQ_DESC_F_INDIRECT 4
-#define VHOST_USER_REPLY_MASK (0x1 << 2)
+
+#define VIRTQ_DESC_F_AVAIL (1 << 7)
+#define VIRTQ_DESC_F_USED (1 << 15)
+
+#define VRING_EVENT_F_ENABLE 0x0
+#define VRING_EVENT_F_DISABLE 0x1
+#define VRING_EVENT_F_DESC 0x2
#define VHOST_USER_PROTOCOL_F_MQ 0
#define VHOST_USER_PROTOCOL_F_LOG_SHMFD 1
@@ -100,8 +107,11 @@ typedef enum
_ (VHOST_F_LOG_ALL, 26) \
_ (VIRTIO_F_ANY_LAYOUT, 27) \
_ (VIRTIO_F_INDIRECT_DESC, 28) \
+ _ (VIRTIO_F_EVENT_IDX, 29) \
_ (VHOST_USER_F_PROTOCOL_FEATURES, 30) \
- _ (VIRTIO_F_VERSION_1, 32)
+ _ (VIRTIO_F_VERSION_1, 32) \
+ _ (VIRTIO_F_RING_PACKED, 34) \
+ _ (VIRTIO_F_IN_ORDER, 35)
typedef enum
{
@@ -130,12 +140,12 @@ int vhost_user_create_if (vnet_main_t * vnm, vlib_main_t * vm,
const char *sock_filename, u8 is_server,
u32 * sw_if_index, u64 feature_mask,
u8 renumber, u32 custom_dev_instance, u8 * hwaddr,
- u8 enable_gso);
+ u8 enable_gso, u8 enable_packed);
int vhost_user_modify_if (vnet_main_t * vnm, vlib_main_t * vm,
const char *sock_filename, u8 is_server,
u32 sw_if_index, u64 feature_mask,
u8 renumber, u32 custom_dev_instance,
- u8 enable_gso);
+ u8 enable_gso, u8 enable_packed);
int vhost_user_delete_if (vnet_main_t * vnm, vlib_main_t * vm,
u32 sw_if_index);
@@ -223,6 +233,22 @@ typedef struct
} ring[VHOST_VRING_MAX_SIZE];
} __attribute ((packed)) vring_used_t;
+typedef CLIB_PACKED (struct
+{
+ u64 addr; // packet data buffer address
+ u32 len; // packet data buffer size
+ u16 id; // buffer id
+ u16 flags; // flags
+}) vring_packed_desc_t;
+
+STATIC_ASSERT_SIZEOF (vring_packed_desc_t, 16);
+
+typedef CLIB_PACKED (struct
+{
+ u16 off_wrap;
+ u16 flags;
+}) vring_desc_event_t;
+
typedef struct
{
u8 flags;
@@ -260,9 +286,21 @@ typedef struct
u16 last_avail_idx;
u16 last_used_idx;
u16 n_since_last_int;
- vring_desc_t *desc;
- vring_avail_t *avail;
- vring_used_t *used;
+ union
+ {
+ vring_desc_t *desc;
+ vring_packed_desc_t *packed_desc;
+ };
+ union
+ {
+ vring_avail_t *avail;
+ vring_desc_event_t *avail_event;
+ };
+ union
+ {
+ vring_used_t *used;
+ vring_desc_event_t *used_event;
+ };
uword desc_user_addr;
uword used_user_addr;
uword avail_user_addr;
@@ -287,6 +325,9 @@ typedef struct
* the interface even if it is disconnected and reconnected.
*/
i16 qid;
+
+ u16 used_wrap_counter;
+ u16 avail_wrap_counter;
} vhost_user_vring_t;
#define VHOST_USER_EVENT_START_TIMER 1
@@ -332,6 +373,10 @@ typedef struct
u16 *per_cpu_tx_qid;
u8 enable_gso;
+
+ /* Packed ring configured */
+ u8 enable_packed;
+
} vhost_user_intf_t;
typedef struct
@@ -350,7 +395,6 @@ typedef struct
virtio_net_hdr_mrg_rxbuf_t hdr; /** Virtio header **/
} vhost_trace_t;
-
#define VHOST_USER_RX_BUFFERS_N (2 * VLIB_FRAME_SIZE + 2)
#define VHOST_USER_COPY_ARRAY_N (4 * VLIB_FRAME_SIZE)
@@ -365,6 +409,9 @@ typedef struct
/* This is here so it doesn't end-up
* using stack or registers. */
vhost_trace_t *current_trace;
+
+ u32 *to_next_list;
+ vlib_buffer_t **rx_buffers_pdesc;
} vhost_cpu_t;
typedef struct
diff --git a/src/vnet/devices/virtio/vhost_user_api.c b/src/vnet/devices/virtio/vhost_user_api.c
index 2ab87a65690..67365334d95 100644
--- a/src/vnet/devices/virtio/vhost_user_api.c
+++ b/src/vnet/devices/virtio/vhost_user_api.c
@@ -71,10 +71,12 @@ vl_api_create_vhost_user_if_t_handler (vl_api_create_vhost_user_if_t * mp)
disabled_features |= (1ULL << FEAT_VIRTIO_F_INDIRECT_DESC);
/*
- * feature mask is not supported via binary API. We disable GSO feature in the
- * feature mask. It may be enabled via enable_gso argument.
+ * GSO and PACKED are not supported by feature mask via binary API. We
+ * disable GSO and PACKED feature in the feature mask. They may be enabled
+ * explicitly via enable_gso and enable_packed argument
*/
- disabled_features |= FEATURE_VIRTIO_NET_F_HOST_GUEST_TSO_FEATURE_BITS;
+ disabled_features |= FEATURE_VIRTIO_NET_F_HOST_GUEST_TSO_FEATURE_BITS |
+ (1ULL << FEAT_VIRTIO_F_RING_PACKED);
features &= ~disabled_features;
if (mp->use_custom_mac)
@@ -86,7 +88,7 @@ vl_api_create_vhost_user_if_t_handler (vl_api_create_vhost_user_if_t * mp)
rv = vhost_user_create_if (vnm, vm, (char *) mp->sock_filename,
mp->is_server, &sw_if_index, features,
mp->renumber, ntohl (mp->custom_dev_instance),
- mac_p, mp->enable_gso);
+ mac_p, mp->enable_gso, mp->enable_packed);
/* Remember an interface tag for the new interface */
if (rv == 0)
@@ -122,16 +124,18 @@ vl_api_modify_vhost_user_if_t_handler (vl_api_modify_vhost_user_if_t * mp)
vlib_main_t *vm = vlib_get_main ();
/*
- * feature mask is not supported via binary API. We disable GSO feature in the
- * feature mask. It may be enabled via enable_gso argument.
+ * GSO and PACKED are not supported by feature mask via binary API. We
+ * disable GSO and PACKED feature in the feature mask. They may be enabled
+ * explicitly via enable_gso and enable_packed argument
*/
- disabled_features |= FEATURE_VIRTIO_NET_F_HOST_GUEST_TSO_FEATURE_BITS;
+ disabled_features |= FEATURE_VIRTIO_NET_F_HOST_GUEST_TSO_FEATURE_BITS |
+ (1ULL << FEAT_VIRTIO_F_RING_PACKED);
features &= ~disabled_features;
rv = vhost_user_modify_if (vnm, vm, (char *) mp->sock_filename,
mp->is_server, sw_if_index, features,
mp->renumber, ntohl (mp->custom_dev_instance),
- mp->enable_gso);
+ mp->enable_gso, mp->enable_packed);
REPLY_MACRO (VL_API_MODIFY_VHOST_USER_IF_REPLY);
}
diff --git a/src/vnet/devices/virtio/vhost_user_inline.h b/src/vnet/devices/virtio/vhost_user_inline.h
index e4a1d596040..ceaf78cf799 100644
--- a/src/vnet/devices/virtio/vhost_user_inline.h
+++ b/src/vnet/devices/virtio/vhost_user_inline.h
@@ -292,6 +292,85 @@ vhost_user_update_gso_interface_count (vhost_user_intf_t * vui, u8 add)
}
}
}
+
+static_always_inline u8
+vhost_user_packed_desc_available (vhost_user_vring_t * vring, u16 idx)
+{
+ return (((vring->packed_desc[idx].flags & VIRTQ_DESC_F_AVAIL) ==
+ vring->avail_wrap_counter));
+}
+
+static_always_inline void
+vhost_user_advance_last_avail_idx (vhost_user_vring_t * vring)
+{
+ vring->last_avail_idx++;
+ if (PREDICT_FALSE ((vring->last_avail_idx & vring->qsz_mask) == 0))
+ vring->avail_wrap_counter ^= VIRTQ_DESC_F_AVAIL;
+}
+
+static_always_inline void
+vhost_user_advance_last_avail_table_idx (vhost_user_intf_t * vui,
+ vhost_user_vring_t * vring,
+ u8 chained)
+{
+ if (chained)
+ {
+ vring_packed_desc_t *desc_table = vring->packed_desc;
+
+ /* pick up the slot of the next avail idx */
+ while (desc_table[vring->last_avail_idx & vring->qsz_mask].flags &
+ VIRTQ_DESC_F_NEXT)
+ vhost_user_advance_last_avail_idx (vring);
+ }
+
+ vhost_user_advance_last_avail_idx (vring);
+}
+
+static_always_inline void
+vhost_user_undo_advanced_last_avail_idx (vhost_user_vring_t * vring)
+{
+ if (PREDICT_FALSE ((vring->last_avail_idx & vring->qsz_mask) == 0))
+ vring->avail_wrap_counter ^= VIRTQ_DESC_F_AVAIL;
+ vring->last_avail_idx--;
+}
+
+static_always_inline void
+vhost_user_dequeue_descs (vhost_user_vring_t * rxvq,
+ virtio_net_hdr_mrg_rxbuf_t * hdr,
+ u16 * n_descs_processed)
+{
+ u16 i;
+
+ *n_descs_processed -= (hdr->num_buffers - 1);
+ for (i = 0; i < hdr->num_buffers - 1; i++)
+ vhost_user_undo_advanced_last_avail_idx (rxvq);
+}
+
+static_always_inline void
+vhost_user_dequeue_chained_descs (vhost_user_vring_t * rxvq,
+ u16 * n_descs_processed)
+{
+ while (*n_descs_processed)
+ {
+ vhost_user_undo_advanced_last_avail_idx (rxvq);
+ (*n_descs_processed)--;
+ }
+}
+
+static_always_inline void
+vhost_user_advance_last_used_idx (vhost_user_vring_t * vring)
+{
+ vring->last_used_idx++;
+ if (PREDICT_FALSE ((vring->last_used_idx & vring->qsz_mask) == 0))
+ vring->used_wrap_counter ^= 1;
+}
+
+static_always_inline u64
+vhost_user_is_packed_ring_supported (vhost_user_intf_t * vui)
+{
+ return (vui->features & (1ULL << FEAT_VIRTIO_F_RING_PACKED));
+}
+
#endif
/*
diff --git a/src/vnet/devices/virtio/vhost_user_input.c b/src/vnet/devices/virtio/vhost_user_input.c
index 4b52bd5a54b..dd899094225 100644
--- a/src/vnet/devices/virtio/vhost_user_input.c
+++ b/src/vnet/devices/virtio/vhost_user_input.c
@@ -74,6 +74,7 @@ extern vlib_node_registration_t vhost_user_input_node;
_(MMAP_FAIL, "mmap failure") \
_(INDIRECT_OVERFLOW, "indirect descriptor overflows table") \
_(UNDERSIZED_FRAME, "undersized ethernet frame received (< 14 bytes)") \
+ _(NOT_READY, "vhost interface not ready or down") \
_(FULL_RX_QUEUE, "full rx queue (possible driver tx drop)")
typedef enum
@@ -249,64 +250,59 @@ vhost_user_handle_rx_offload (vlib_buffer_t * b0, u8 * b0_data,
virtio_net_hdr_t * hdr)
{
u8 l4_hdr_sz = 0;
+ u8 l4_proto = 0;
+ ethernet_header_t *eh = (ethernet_header_t *) b0_data;
+ u16 ethertype = clib_net_to_host_u16 (eh->type);
+ u16 l2hdr_sz = sizeof (ethernet_header_t);
- if (hdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM)
+ if (ethernet_frame_is_tagged (ethertype))
{
- u8 l4_proto = 0;
- ethernet_header_t *eh = (ethernet_header_t *) b0_data;
- u16 ethertype = clib_net_to_host_u16 (eh->type);
- u16 l2hdr_sz = sizeof (ethernet_header_t);
+ ethernet_vlan_header_t *vlan = (ethernet_vlan_header_t *) (eh + 1);
- if (ethernet_frame_is_tagged (ethertype))
+ ethertype = clib_net_to_host_u16 (vlan->type);
+ l2hdr_sz += sizeof (*vlan);
+ if (ethertype == ETHERNET_TYPE_VLAN)
{
- ethernet_vlan_header_t *vlan = (ethernet_vlan_header_t *) (eh + 1);
-
+ vlan++;
ethertype = clib_net_to_host_u16 (vlan->type);
l2hdr_sz += sizeof (*vlan);
- if (ethertype == ETHERNET_TYPE_VLAN)
- {
- vlan++;
- ethertype = clib_net_to_host_u16 (vlan->type);
- l2hdr_sz += sizeof (*vlan);
- }
- }
- vnet_buffer (b0)->l2_hdr_offset = 0;
- vnet_buffer (b0)->l3_hdr_offset = l2hdr_sz;
- vnet_buffer (b0)->l4_hdr_offset = hdr->csum_start;
- b0->flags |= (VNET_BUFFER_F_L2_HDR_OFFSET_VALID |
- VNET_BUFFER_F_L3_HDR_OFFSET_VALID |
- VNET_BUFFER_F_L4_HDR_OFFSET_VALID);
-
- if (PREDICT_TRUE (ethertype == ETHERNET_TYPE_IP4))
- {
- ip4_header_t *ip4 = (ip4_header_t *) (b0_data + l2hdr_sz);
- l4_proto = ip4->protocol;
- b0->flags |= (VNET_BUFFER_F_IS_IP4 |
- VNET_BUFFER_F_OFFLOAD_IP_CKSUM);
- }
- else if (PREDICT_TRUE (ethertype == ETHERNET_TYPE_IP6))
- {
- ip6_header_t *ip6 = (ip6_header_t *) (b0_data + l2hdr_sz);
- l4_proto = ip6->protocol;
- b0->flags |= VNET_BUFFER_F_IS_IP6;
}
+ }
+ vnet_buffer (b0)->l2_hdr_offset = 0;
+ vnet_buffer (b0)->l3_hdr_offset = l2hdr_sz;
+ vnet_buffer (b0)->l4_hdr_offset = hdr->csum_start;
+ b0->flags |= (VNET_BUFFER_F_L2_HDR_OFFSET_VALID |
+ VNET_BUFFER_F_L3_HDR_OFFSET_VALID |
+ VNET_BUFFER_F_L4_HDR_OFFSET_VALID);
+
+ if (PREDICT_TRUE (ethertype == ETHERNET_TYPE_IP4))
+ {
+ ip4_header_t *ip4 = (ip4_header_t *) (b0_data + l2hdr_sz);
+ l4_proto = ip4->protocol;
+ b0->flags |= VNET_BUFFER_F_IS_IP4 | VNET_BUFFER_F_OFFLOAD_IP_CKSUM;
+ }
+ else if (PREDICT_TRUE (ethertype == ETHERNET_TYPE_IP6))
+ {
+ ip6_header_t *ip6 = (ip6_header_t *) (b0_data + l2hdr_sz);
+ l4_proto = ip6->protocol;
+ b0->flags |= VNET_BUFFER_F_IS_IP6;
+ }
- if (l4_proto == IP_PROTOCOL_TCP)
- {
- tcp_header_t *tcp = (tcp_header_t *)
- (b0_data + vnet_buffer (b0)->l4_hdr_offset);
- l4_hdr_sz = tcp_header_bytes (tcp);
- tcp->checksum = 0;
- b0->flags |= VNET_BUFFER_F_OFFLOAD_TCP_CKSUM;
- }
- else if (l4_proto == IP_PROTOCOL_UDP)
- {
- udp_header_t *udp =
- (udp_header_t *) (b0_data + vnet_buffer (b0)->l4_hdr_offset);
- l4_hdr_sz = sizeof (*udp);
- udp->checksum = 0;
- b0->flags |= VNET_BUFFER_F_OFFLOAD_UDP_CKSUM;
- }
+ if (l4_proto == IP_PROTOCOL_TCP)
+ {
+ tcp_header_t *tcp = (tcp_header_t *)
+ (b0_data + vnet_buffer (b0)->l4_hdr_offset);
+ l4_hdr_sz = tcp_header_bytes (tcp);
+ tcp->checksum = 0;
+ b0->flags |= VNET_BUFFER_F_OFFLOAD_TCP_CKSUM;
+ }
+ else if (l4_proto == IP_PROTOCOL_UDP)
+ {
+ udp_header_t *udp =
+ (udp_header_t *) (b0_data + vnet_buffer (b0)->l4_hdr_offset);
+ l4_hdr_sz = sizeof (*udp);
+ udp->checksum = 0;
+ b0->flags |= VNET_BUFFER_F_OFFLOAD_UDP_CKSUM;
}
if (hdr->gso_type == VIRTIO_NET_HDR_GSO_UDP)
@@ -329,6 +325,57 @@ vhost_user_handle_rx_offload (vlib_buffer_t * b0, u8 * b0_data,
}
}
+static_always_inline void
+vhost_user_input_do_interrupt (vlib_main_t * vm, vhost_user_vring_t * txvq,
+ vhost_user_vring_t * rxvq)
+{
+ f64 now = vlib_time_now (vm);
+
+ 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);
+}
+
+static_always_inline void
+vhost_user_input_setup_frame (vlib_main_t * vm, vlib_node_runtime_t * node,
+ vhost_user_intf_t * vui,
+ u32 * current_config_index, u32 * next_index,
+ u32 ** to_next, u32 * n_left_to_next)
+{
+ vnet_feature_main_t *fm = &feature_main;
+ u8 feature_arc_idx = fm->device_input_feature_arc_index;
+
+ if (PREDICT_FALSE (vnet_have_features (feature_arc_idx, vui->sw_if_index)))
+ {
+ vnet_feature_config_main_t *cm;
+ cm = &fm->feature_config_mains[feature_arc_idx];
+ *current_config_index = vec_elt (cm->config_index_by_sw_if_index,
+ vui->sw_if_index);
+ vnet_get_config_data (&cm->config_main, current_config_index,
+ next_index, 0);
+ }
+
+ vlib_get_new_next_frame (vm, node, *next_index, *to_next, *n_left_to_next);
+
+ if (*next_index == VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT)
+ {
+ /* give some hints to ethernet-input */
+ vlib_next_frame_t *nf;
+ vlib_frame_t *f;
+ ethernet_input_frame_t *ef;
+ nf = vlib_node_runtime_get_next_frame (vm, node, *next_index);
+ f = vlib_get_frame (vm, nf->frame);
+ f->flags = ETH_INPUT_FRAME_F_SINGLE_SW_IF_IDX;
+
+ ef = vlib_frame_scalar_args (f);
+ ef->sw_if_index = vui->sw_if_index;
+ ef->hw_if_index = vui->hw_if_index;
+ vlib_frame_no_append (f);
+ }
+}
+
static_always_inline u32
vhost_user_if_input (vlib_main_t * vm,
vhost_user_main_t * vum,
@@ -359,13 +406,7 @@ vhost_user_if_input (vlib_main_t * vm,
{
/* do we have pending interrupts ? */
vhost_user_vring_t *rxvq = &vui->vrings[VHOST_VRING_IDX_RX (qid)];
- f64 now = vlib_time_now (vm);
-
- 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);
+ vhost_user_input_do_interrupt (vm, txvq, rxvq);
}
/*
@@ -461,37 +502,12 @@ vhost_user_if_input (vlib_main_t * vm,
}
}
- if (PREDICT_FALSE (vnet_have_features (feature_arc_idx, vui->sw_if_index)))
- {
- vnet_feature_config_main_t *cm;
- cm = &fm->feature_config_mains[feature_arc_idx];
- current_config_index = vec_elt (cm->config_index_by_sw_if_index,
- vui->sw_if_index);
- vnet_get_config_data (&cm->config_main, &current_config_index,
- &next_index, 0);
- }
+ vhost_user_input_setup_frame (vm, node, vui, &current_config_index,
+ &next_index, &to_next, &n_left_to_next);
u16 last_avail_idx = txvq->last_avail_idx;
u16 last_used_idx = txvq->last_used_idx;
- vlib_get_new_next_frame (vm, node, next_index, to_next, n_left_to_next);
-
- if (next_index == VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT)
- {
- /* give some hints to ethernet-input */
- vlib_next_frame_t *nf;
- vlib_frame_t *f;
- ethernet_input_frame_t *ef;
- nf = vlib_node_runtime_get_next_frame (vm, node, next_index);
- f = vlib_get_frame (vm, nf->frame);
- f->flags = ETH_INPUT_FRAME_F_SINGLE_SW_IF_IDX;
-
- ef = vlib_frame_scalar_args (f);
- ef->sw_if_index = vui->sw_if_index;
- ef->hw_if_index = vui->hw_if_index;
- vlib_frame_no_append (f);
- }
-
while (n_left > 0)
{
vlib_buffer_t *b_head, *b_current;
@@ -747,6 +763,654 @@ done:
return n_rx_packets;
}
+static_always_inline void
+vhost_user_mark_desc_consumed (vhost_user_intf_t * vui,
+ vhost_user_vring_t * txvq, u16 desc_head,
+ u16 n_descs_processed)
+{
+ vring_packed_desc_t *desc_table = txvq->packed_desc;
+ u16 desc_idx;
+ u16 mask = txvq->qsz_mask;
+
+ for (desc_idx = 0; desc_idx < n_descs_processed; desc_idx++)
+ {
+ if (txvq->used_wrap_counter)
+ desc_table[(desc_head + desc_idx) & mask].flags |=
+ (VIRTQ_DESC_F_AVAIL | VIRTQ_DESC_F_USED);
+ else
+ desc_table[(desc_head + desc_idx) & mask].flags &=
+ ~(VIRTQ_DESC_F_AVAIL | VIRTQ_DESC_F_USED);
+ vhost_user_advance_last_used_idx (txvq);
+ }
+}
+
+static_always_inline void
+vhost_user_rx_trace_packed (vhost_trace_t * t, vhost_user_intf_t * vui,
+ u16 qid, vhost_user_vring_t * txvq,
+ u16 desc_current)
+{
+ vhost_user_main_t *vum = &vhost_user_main;
+ vring_packed_desc_t *hdr_desc;
+ virtio_net_hdr_mrg_rxbuf_t *hdr;
+ u32 hint = 0;
+
+ clib_memset (t, 0, sizeof (*t));
+ t->device_index = vui - vum->vhost_user_interfaces;
+ t->qid = qid;
+
+ hdr_desc = &txvq->packed_desc[desc_current];
+ if (txvq->packed_desc[desc_current].flags & VIRTQ_DESC_F_INDIRECT)
+ {
+ t->virtio_ring_flags |= 1 << VIRTIO_TRACE_F_INDIRECT;
+ /* Header is the first here */
+ hdr_desc = map_guest_mem (vui, txvq->packed_desc[desc_current].addr,
+ &hint);
+ }
+ if (txvq->packed_desc[desc_current].flags & VIRTQ_DESC_F_NEXT)
+ t->virtio_ring_flags |= 1 << VIRTIO_TRACE_F_SIMPLE_CHAINED;
+
+ if (!(txvq->packed_desc[desc_current].flags & VIRTQ_DESC_F_NEXT) &&
+ !(txvq->packed_desc[desc_current].flags & VIRTQ_DESC_F_INDIRECT))
+ t->virtio_ring_flags |= 1 << VIRTIO_TRACE_F_SINGLE_DESC;
+
+ t->first_desc_len = hdr_desc ? hdr_desc->len : 0;
+
+ if (!hdr_desc || !(hdr = map_guest_mem (vui, hdr_desc->addr, &hint)))
+ t->virtio_ring_flags |= 1 << VIRTIO_TRACE_F_MAP_ERROR;
+ else
+ {
+ u32 len = vui->virtio_net_hdr_sz;
+ clib_memcpy_fast (&t->hdr, hdr,
+ len > hdr_desc->len ? hdr_desc->len : len);
+ }
+}
+
+static_always_inline u32
+vhost_user_rx_discard_packet_packed (vlib_main_t * vm,
+ vhost_user_intf_t * vui,
+ vhost_user_vring_t * txvq,
+ u32 discard_max)
+{
+ u32 discarded_packets = 0;
+ u16 mask = txvq->qsz_mask;
+ u16 desc_current, desc_head;
+
+ desc_head = desc_current = txvq->last_used_idx & mask;
+
+ /*
+ * On the RX side, each packet corresponds to one descriptor
+ * (it is the same whether it is a shallow descriptor, chained, or indirect).
+ * Therefore, discarding a packet is like discarding a descriptor.
+ */
+ while ((discarded_packets != discard_max) &&
+ vhost_user_packed_desc_available (txvq, desc_current))
+ {
+ vhost_user_advance_last_avail_idx (txvq);
+ discarded_packets++;
+ desc_current = (desc_current + 1) & mask;
+ }
+
+ if (PREDICT_TRUE (discarded_packets))
+ vhost_user_mark_desc_consumed (vui, txvq, desc_head, discarded_packets);
+ return (discarded_packets);
+}
+
+static_always_inline u32
+vhost_user_input_copy_packed (vhost_user_intf_t * vui, vhost_copy_t * cpy,
+ u16 copy_len, u32 * map_hint)
+{
+ void *src0, *src1, *src2, *src3, *src4, *src5, *src6, *src7;
+ u8 bad;
+ u32 rc = VHOST_USER_INPUT_FUNC_ERROR_NO_ERROR;
+
+ if (PREDICT_TRUE (copy_len >= 8))
+ {
+ src4 = map_guest_mem (vui, cpy[0].src, map_hint);
+ src5 = map_guest_mem (vui, cpy[1].src, map_hint);
+ src6 = map_guest_mem (vui, cpy[2].src, map_hint);
+ src7 = map_guest_mem (vui, cpy[3].src, map_hint);
+ bad = (src4 == 0) + (src5 == 0) + (src6 == 0) + (src7 == 0);
+ if (PREDICT_FALSE (bad))
+ goto one_by_one;
+ CLIB_PREFETCH (src4, 64, LOAD);
+ CLIB_PREFETCH (src5, 64, LOAD);
+ CLIB_PREFETCH (src6, 64, LOAD);
+ CLIB_PREFETCH (src7, 64, LOAD);
+
+ while (PREDICT_TRUE (copy_len >= 8))
+ {
+ src0 = src4;
+ src1 = src5;
+ src2 = src6;
+ src3 = src7;
+
+ src4 = map_guest_mem (vui, cpy[4].src, map_hint);
+ src5 = map_guest_mem (vui, cpy[5].src, map_hint);
+ src6 = map_guest_mem (vui, cpy[6].src, map_hint);
+ src7 = map_guest_mem (vui, cpy[7].src, map_hint);
+ bad = (src4 == 0) + (src5 == 0) + (src6 == 0) + (src7 == 0);
+ if (PREDICT_FALSE (bad))
+ break;
+
+ CLIB_PREFETCH (src4, 64, LOAD);
+ CLIB_PREFETCH (src5, 64, LOAD);
+ CLIB_PREFETCH (src6, 64, LOAD);
+ CLIB_PREFETCH (src7, 64, LOAD);
+
+ clib_memcpy_fast ((void *) cpy[0].dst, src0, cpy[0].len);
+ clib_memcpy_fast ((void *) cpy[1].dst, src1, cpy[1].len);
+ clib_memcpy_fast ((void *) cpy[2].dst, src2, cpy[2].len);
+ clib_memcpy_fast ((void *) cpy[3].dst, src3, cpy[3].len);
+ copy_len -= 4;
+ cpy += 4;
+ }
+ }
+
+one_by_one:
+ while (copy_len)
+ {
+ if (PREDICT_FALSE (!(src0 = map_guest_mem (vui, cpy->src, map_hint))))
+ {
+ rc = VHOST_USER_INPUT_FUNC_ERROR_MMAP_FAIL;
+ break;
+ }
+ clib_memcpy_fast ((void *) cpy->dst, src0, cpy->len);
+ copy_len -= 1;
+ cpy += 1;
+ }
+ return rc;
+}
+
+static_always_inline u32
+vhost_user_do_offload (vhost_user_intf_t * vui,
+ vring_packed_desc_t * desc_table, u16 desc_current,
+ u16 mask, vlib_buffer_t * b_head, u32 * map_hint)
+{
+ u32 rc = VHOST_USER_INPUT_FUNC_ERROR_NO_ERROR;
+ virtio_net_hdr_mrg_rxbuf_t *hdr;
+ u8 *b_data;
+ u32 desc_data_offset = vui->virtio_net_hdr_sz;
+
+ hdr = map_guest_mem (vui, desc_table[desc_current].addr, map_hint);
+ if (PREDICT_FALSE (hdr == 0))
+ rc = VHOST_USER_INPUT_FUNC_ERROR_MMAP_FAIL;
+ else if (hdr->hdr.flags & VIRTIO_NET_HDR_F_NEEDS_CSUM)
+ {
+ if (desc_data_offset == desc_table[desc_current].len)
+ {
+ desc_current = (desc_current + 1) & mask;
+ b_data =
+ map_guest_mem (vui, desc_table[desc_current].addr, map_hint);
+ if (PREDICT_FALSE (b_data == 0))
+ rc = VHOST_USER_INPUT_FUNC_ERROR_MMAP_FAIL;
+ else
+ vhost_user_handle_rx_offload (b_head, b_data, &hdr->hdr);
+ }
+ else
+ {
+ b_data = (u8 *) hdr + desc_data_offset;
+ vhost_user_handle_rx_offload (b_head, b_data, &hdr->hdr);
+ }
+ }
+
+ return rc;
+}
+
+static_always_inline u32
+vhost_user_compute_buffers_required (u32 desc_len, u32 buffer_data_size)
+{
+ div_t result;
+ u32 buffers_required;
+
+ if (PREDICT_TRUE (buffer_data_size == 2048))
+ {
+ buffers_required = desc_len >> 11;
+ if ((desc_len & 2047) != 0)
+ buffers_required++;
+ return (buffers_required);
+ }
+
+ if (desc_len < buffer_data_size)
+ return 1;
+
+ result = div (desc_len, buffer_data_size);
+ if (result.rem)
+ buffers_required = result.quot + 1;
+ else
+ buffers_required = result.quot;
+
+ return (buffers_required);
+}
+
+static_always_inline u32
+vhost_user_compute_indirect_desc_len (vhost_user_intf_t * vui,
+ vhost_user_vring_t * txvq,
+ u32 buffer_data_size, u16 desc_current,
+ u32 * map_hint)
+{
+ vring_packed_desc_t *desc_table = txvq->packed_desc;
+ u32 desc_len = 0;
+ u16 desc_data_offset = vui->virtio_net_hdr_sz;
+ u16 desc_idx = desc_current;
+ u32 n_descs;
+
+ n_descs = desc_table[desc_idx].len >> 4;
+ desc_table = map_guest_mem (vui, desc_table[desc_idx].addr, map_hint);
+ if (PREDICT_FALSE (desc_table == 0))
+ return 0;
+
+ for (desc_idx = 0; desc_idx < n_descs; desc_idx++)
+ desc_len += desc_table[desc_idx].len;
+
+ if (PREDICT_TRUE (desc_len > desc_data_offset))
+ desc_len -= desc_data_offset;
+
+ return vhost_user_compute_buffers_required (desc_len, buffer_data_size);
+}
+
+static_always_inline u32
+vhost_user_compute_chained_desc_len (vhost_user_intf_t * vui,
+ vhost_user_vring_t * txvq,
+ u32 buffer_data_size, u16 * current,
+ u16 * n_left)
+{
+ vring_packed_desc_t *desc_table = txvq->packed_desc;
+ u32 desc_len = 0;
+ u16 mask = txvq->qsz_mask;
+
+ while (desc_table[*current].flags & VIRTQ_DESC_F_NEXT)
+ {
+ desc_len += desc_table[*current].len;
+ (*n_left)++;
+ *current = (*current + 1) & mask;
+ vhost_user_advance_last_avail_idx (txvq);
+ }
+ desc_len += desc_table[*current].len;
+ (*n_left)++;
+ *current = (*current + 1) & mask;
+ vhost_user_advance_last_avail_idx (txvq);
+
+ if (PREDICT_TRUE (desc_len > vui->virtio_net_hdr_sz))
+ desc_len -= vui->virtio_net_hdr_sz;
+
+ return vhost_user_compute_buffers_required (desc_len, buffer_data_size);
+}
+
+static_always_inline void
+vhost_user_assemble_packet (vring_packed_desc_t * desc_table,
+ u16 * desc_idx, vlib_buffer_t * b_head,
+ vlib_buffer_t ** b_current, u32 ** next,
+ vlib_buffer_t *** b, u32 * bi_current,
+ vhost_cpu_t * cpu, u16 * copy_len,
+ u32 * buffers_used, u32 buffers_required,
+ u32 * desc_data_offset, u32 buffer_data_size,
+ u16 mask)
+{
+ u32 desc_data_l;
+
+ while (*desc_data_offset < desc_table[*desc_idx].len)
+ {
+ /* Get more output if necessary. Or end of packet. */
+ if (PREDICT_FALSE ((*b_current)->current_length == buffer_data_size))
+ {
+ /* Get next output */
+ u32 bi_next = **next;
+ (*next)++;
+ (*b_current)->next_buffer = bi_next;
+ (*b_current)->flags |= VLIB_BUFFER_NEXT_PRESENT;
+ *bi_current = bi_next;
+ *b_current = **b;
+ (*b)++;
+ (*buffers_used)++;
+ ASSERT (*buffers_used <= buffers_required);
+ }
+
+ /* Prepare a copy order executed later for the data */
+ ASSERT (*copy_len < VHOST_USER_COPY_ARRAY_N);
+ vhost_copy_t *cpy = &cpu->copy[*copy_len];
+ (*copy_len)++;
+ desc_data_l = desc_table[*desc_idx].len - *desc_data_offset;
+ cpy->len = buffer_data_size - (*b_current)->current_length;
+ cpy->len = (cpy->len > desc_data_l) ? desc_data_l : cpy->len;
+ cpy->dst = (uword) (vlib_buffer_get_current (*b_current) +
+ (*b_current)->current_length);
+ cpy->src = desc_table[*desc_idx].addr + *desc_data_offset;
+
+ *desc_data_offset += cpy->len;
+
+ (*b_current)->current_length += cpy->len;
+ b_head->total_length_not_including_first_buffer += cpy->len;
+ }
+ *desc_idx = (*desc_idx + 1) & mask;;
+ *desc_data_offset = 0;
+}
+
+static_always_inline u32
+vhost_user_if_input_packed (vlib_main_t * vm, vhost_user_main_t * vum,
+ vhost_user_intf_t * vui, u16 qid,
+ vlib_node_runtime_t * node,
+ vnet_hw_interface_rx_mode mode, u8 enable_csum)
+{
+ vhost_user_vring_t *txvq = &vui->vrings[VHOST_VRING_IDX_TX (qid)];
+ vnet_feature_main_t *fm = &feature_main;
+ u8 feature_arc_idx = fm->device_input_feature_arc_index;
+ u16 n_rx_packets = 0;
+ u32 n_rx_bytes = 0;
+ u16 n_left = 0;
+ u32 buffers_required = 0;
+ u32 n_left_to_next, *to_next;
+ u32 next_index = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
+ u32 n_trace = vlib_get_trace_count (vm, node);
+ u32 buffer_data_size = vlib_buffer_get_default_data_size (vm);
+ u32 map_hint = 0;
+ vhost_cpu_t *cpu = &vum->cpus[vm->thread_index];
+ u16 copy_len = 0;
+ u32 current_config_index = ~0;
+ u16 mask = txvq->qsz_mask;
+ u16 desc_current, desc_head, last_used_idx;
+ vring_packed_desc_t *desc_table = 0;
+ u32 n_descs_processed = 0;
+ u32 rv;
+ vlib_buffer_t **b;
+ u32 *next;
+ u32 buffers_used = 0;
+ u16 current, n_descs_to_process;
+
+ /* The descriptor table is not ready yet */
+ if (PREDICT_FALSE (txvq->packed_desc == 0))
+ goto done;
+
+ /* do we have pending interrupts ? */
+ vhost_user_vring_t *rxvq = &vui->vrings[VHOST_VRING_IDX_RX (qid)];
+ vhost_user_input_do_interrupt (vm, txvq, rxvq);
+
+ /*
+ * For adaptive mode, it is optimized to reduce interrupts.
+ * If the scheduler switches the input node to polling due
+ * to burst of traffic, we tell the driver no interrupt.
+ * When the traffic subsides, the scheduler switches the node back to
+ * interrupt mode. We must tell the driver we want interrupt.
+ */
+ if (PREDICT_FALSE (mode == VNET_HW_INTERFACE_RX_MODE_ADAPTIVE))
+ {
+ if ((node->flags &
+ VLIB_NODE_FLAG_SWITCH_FROM_POLLING_TO_INTERRUPT_MODE) ||
+ !(node->flags &
+ VLIB_NODE_FLAG_SWITCH_FROM_INTERRUPT_TO_POLLING_MODE))
+ /* Tell driver we want notification */
+ txvq->used_event->flags = 0;
+ else
+ /* Tell driver we don't want notification */
+ txvq->used_event->flags = VRING_EVENT_F_DISABLE;
+ }
+
+ last_used_idx = txvq->last_used_idx & mask;
+ desc_head = desc_current = last_used_idx;
+
+ if (vhost_user_packed_desc_available (txvq, desc_current) == 0)
+ goto done;
+
+ if (PREDICT_FALSE (!vui->admin_up || !vui->is_ready || !(txvq->enabled)))
+ {
+ /*
+ * 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."
+ */
+ rv = vhost_user_rx_discard_packet_packed (vm, vui, txvq,
+ VHOST_USER_DOWN_DISCARD_COUNT);
+ vlib_error_count (vm, vhost_user_input_node.index,
+ VHOST_USER_INPUT_FUNC_ERROR_NOT_READY, rv);
+ goto done;
+ }
+
+ vhost_user_input_setup_frame (vm, node, vui, &current_config_index,
+ &next_index, &to_next, &n_left_to_next);
+
+ /*
+ * Compute n_left and total buffers needed
+ */
+ desc_table = txvq->packed_desc;
+ current = desc_current;
+ while (vhost_user_packed_desc_available (txvq, current) &&
+ (n_left < VLIB_FRAME_SIZE))
+ {
+ if (desc_table[current].flags & VIRTQ_DESC_F_INDIRECT)
+ {
+ buffers_required +=
+ vhost_user_compute_indirect_desc_len (vui, txvq, buffer_data_size,
+ current, &map_hint);
+ n_left++;
+ current = (current + 1) & mask;
+ vhost_user_advance_last_avail_idx (txvq);
+ }
+ else
+ {
+ buffers_required +=
+ vhost_user_compute_chained_desc_len (vui, txvq, buffer_data_size,
+ &current, &n_left);
+ }
+ }
+
+ /* Something is broken if we need more than 10000 buffers */
+ if (PREDICT_FALSE ((buffers_required == 0) || (buffers_required > 10000)))
+ {
+ rv = vhost_user_rx_discard_packet_packed (vm, vui, txvq, n_left);
+ vlib_error_count (vm, vhost_user_input_node.index,
+ VHOST_USER_INPUT_FUNC_ERROR_NO_BUFFER, rv);
+ goto done;
+ }
+
+ vec_validate (cpu->to_next_list, buffers_required);
+ rv = vlib_buffer_alloc (vm, cpu->to_next_list, buffers_required);
+ if (PREDICT_FALSE (rv != buffers_required))
+ {
+ vlib_buffer_free (vm, cpu->to_next_list, rv);
+ rv = vhost_user_rx_discard_packet_packed (vm, vui, txvq, n_left);
+ vlib_error_count (vm, vhost_user_input_node.index,
+ VHOST_USER_INPUT_FUNC_ERROR_NO_BUFFER, rv);
+ goto done;
+ }
+
+ next = cpu->to_next_list;
+ vec_validate (cpu->rx_buffers_pdesc, buffers_required);
+ vlib_get_buffers (vm, next, cpu->rx_buffers_pdesc, buffers_required);
+ b = cpu->rx_buffers_pdesc;
+ n_descs_processed = n_left;
+
+ while (n_left)
+ {
+ vlib_buffer_t *b_head, *b_current;
+ u32 bi_current;
+ u32 desc_data_offset;
+ u16 desc_idx = desc_current;
+ u32 n_descs;
+
+ desc_table = txvq->packed_desc;
+ to_next[0] = bi_current = next[0];
+ b_head = b_current = b[0];
+ b++;
+ buffers_used++;
+ ASSERT (buffers_used <= buffers_required);
+ to_next++;
+ next++;
+ n_left_to_next--;
+
+ /* The buffer should already be initialized */
+ b_head->total_length_not_including_first_buffer = 0;
+ b_head->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
+ desc_data_offset = vui->virtio_net_hdr_sz;
+ n_descs_to_process = 1;
+
+ if (desc_table[desc_idx].flags & VIRTQ_DESC_F_INDIRECT)
+ {
+ n_descs = desc_table[desc_idx].len >> 4;
+ desc_table = map_guest_mem (vui, desc_table[desc_idx].addr,
+ &map_hint);
+ desc_idx = 0;
+ if (PREDICT_FALSE (desc_table == 0) ||
+ (enable_csum &&
+ (PREDICT_FALSE
+ (vhost_user_do_offload
+ (vui, desc_table, desc_idx, mask, b_head,
+ &map_hint) != VHOST_USER_INPUT_FUNC_ERROR_NO_ERROR))))
+ {
+ vlib_error_count (vm, node->node_index,
+ VHOST_USER_INPUT_FUNC_ERROR_MMAP_FAIL, 1);
+ to_next--;
+ next--;
+ n_left_to_next++;
+ buffers_used--;
+ b--;
+ goto out;
+ }
+ while (n_descs)
+ {
+ vhost_user_assemble_packet (desc_table, &desc_idx, b_head,
+ &b_current, &next, &b, &bi_current,
+ cpu, &copy_len, &buffers_used,
+ buffers_required, &desc_data_offset,
+ buffer_data_size, mask);
+ n_descs--;
+ }
+ }
+ else
+ {
+ if (enable_csum)
+ {
+ rv = vhost_user_do_offload (vui, desc_table, desc_idx, mask,
+ b_head, &map_hint);
+ if (PREDICT_FALSE (rv != VHOST_USER_INPUT_FUNC_ERROR_NO_ERROR))
+ {
+ vlib_error_count (vm, node->node_index, rv, 1);
+ to_next--;
+ next--;
+ n_left_to_next++;
+ buffers_used--;
+ b--;
+ goto out;
+ }
+ }
+ /*
+ * For chained descriptor, we process all chains in a single while
+ * loop. So count how many descriptors in the chain.
+ */
+ n_descs_to_process = 1;
+ while (desc_table[desc_idx].flags & VIRTQ_DESC_F_NEXT)
+ {
+ vhost_user_assemble_packet (desc_table, &desc_idx, b_head,
+ &b_current, &next, &b, &bi_current,
+ cpu, &copy_len, &buffers_used,
+ buffers_required, &desc_data_offset,
+ buffer_data_size, mask);
+ n_descs_to_process++;
+ }
+ vhost_user_assemble_packet (desc_table, &desc_idx, b_head,
+ &b_current, &next, &b, &bi_current,
+ cpu, &copy_len, &buffers_used,
+ buffers_required, &desc_data_offset,
+ buffer_data_size, mask);
+ }
+
+ n_rx_bytes += b_head->total_length_not_including_first_buffer;
+ n_rx_packets++;
+
+ b_head->total_length_not_including_first_buffer -=
+ b_head->current_length;
+
+ VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b_head);
+
+ vnet_buffer (b_head)->sw_if_index[VLIB_RX] = vui->sw_if_index;
+ vnet_buffer (b_head)->sw_if_index[VLIB_TX] = ~0;
+ b_head->error = 0;
+
+ if (current_config_index != ~0)
+ {
+ b_head->current_config_index = current_config_index;
+ vnet_buffer (b_head)->feature_arc_index = feature_arc_idx;
+ }
+
+ out:
+ ASSERT (n_left >= n_descs_to_process);
+ n_left -= n_descs_to_process;
+
+ /* advance to next descrptor */
+ desc_current = (desc_current + n_descs_to_process) & mask;
+
+ /*
+ * Although separating memory copies from virtio ring parsing
+ * is beneficial, we can offer to perform the copies from time
+ * to time in order to free some space in the ring.
+ */
+ if (PREDICT_FALSE (copy_len >= VHOST_USER_RX_COPY_THRESHOLD))
+ {
+ rv = vhost_user_input_copy_packed (vui, cpu->copy, copy_len,
+ &map_hint);
+ if (PREDICT_FALSE (rv != VHOST_USER_INPUT_FUNC_ERROR_NO_ERROR))
+ vlib_error_count (vm, node->node_index, rv, 1);
+ copy_len = 0;
+ }
+ }
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+
+ /* Do the memory copies */
+ rv = vhost_user_input_copy_packed (vui, cpu->copy, copy_len, &map_hint);
+ if (PREDICT_FALSE (rv != VHOST_USER_INPUT_FUNC_ERROR_NO_ERROR))
+ vlib_error_count (vm, node->node_index, rv, 1);
+
+ /* Must do the tracing before giving buffers back to driver */
+ if (PREDICT_FALSE (n_trace))
+ {
+ u32 left = n_rx_packets;
+
+ b = cpu->rx_buffers_pdesc;
+ while (n_trace && left)
+ {
+ vhost_trace_t *t0;
+
+ vlib_trace_buffer (vm, node, next_index, b[0],
+ /* follow_chain */ 0);
+ t0 = vlib_add_trace (vm, node, b[0], sizeof (t0[0]));
+ b++;
+ vhost_user_rx_trace_packed (t0, vui, qid, txvq, last_used_idx);
+ last_used_idx = (last_used_idx + 1) & mask;
+ n_trace--;
+ left--;
+ vlib_set_trace_count (vm, node, n_trace);
+ }
+ }
+
+ /*
+ * Give buffers back to driver.
+ */
+ vhost_user_mark_desc_consumed (vui, txvq, desc_head, n_descs_processed);
+
+ /* interrupt (call) handling */
+ if ((txvq->callfd_idx != ~0) &&
+ (txvq->avail_event->flags != VRING_EVENT_F_DISABLE))
+ {
+ txvq->n_since_last_int += n_rx_packets;
+ if (txvq->n_since_last_int > vum->coalesce_frames)
+ vhost_user_send_call (vm, txvq);
+ }
+
+ /* increase rx counters */
+ vlib_increment_combined_counter
+ (vnet_main.interface_main.combined_sw_if_counters
+ + VNET_INTERFACE_COUNTER_RX, vm->thread_index, vui->sw_if_index,
+ n_rx_packets, n_rx_bytes);
+
+ vnet_device_increment_rx_packets (vm->thread_index, n_rx_packets);
+
+ if (PREDICT_FALSE (buffers_used < buffers_required))
+ vlib_buffer_free (vm, next, buffers_required - buffers_used);
+
+done:
+ return n_rx_packets;
+}
+
VLIB_NODE_FN (vhost_user_input_node) (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * frame)
@@ -765,14 +1429,26 @@ VLIB_NODE_FN (vhost_user_input_node) (vlib_main_t * vm,
{
vui =
pool_elt_at_index (vum->vhost_user_interfaces, dq->dev_instance);
- if (vui->features & (1ULL << FEAT_VIRTIO_NET_F_CSUM))
- n_rx_packets +=
- vhost_user_if_input (vm, vum, vui, dq->queue_id, node, dq->mode,
- 1);
+ if (vhost_user_is_packed_ring_supported (vui))
+ {
+ if (vui->features & (1ULL << FEAT_VIRTIO_NET_F_CSUM))
+ n_rx_packets += vhost_user_if_input_packed (vm, vum, vui,
+ dq->queue_id, node,
+ dq->mode, 1);
+ else
+ n_rx_packets += vhost_user_if_input_packed (vm, vum, vui,
+ dq->queue_id, node,
+ dq->mode, 0);
+ }
else
- n_rx_packets +=
- vhost_user_if_input (vm, vum, vui, dq->queue_id, node, dq->mode,
- 0);
+ {
+ if (vui->features & (1ULL << FEAT_VIRTIO_NET_F_CSUM))
+ n_rx_packets += vhost_user_if_input (vm, vum, vui, dq->queue_id,
+ node, dq->mode, 1);
+ else
+ n_rx_packets += vhost_user_if_input (vm, vum, vui, dq->queue_id,
+ node, dq->mode, 0);
+ }
}
}
diff --git a/src/vnet/devices/virtio/vhost_user_output.c b/src/vnet/devices/virtio/vhost_user_output.c
index b6abe36d972..4f5eb3c1d76 100644
--- a/src/vnet/devices/virtio/vhost_user_output.c
+++ b/src/vnet/devices/virtio/vhost_user_output.c
@@ -294,6 +294,424 @@ vhost_user_handle_tx_offload (vhost_user_intf_t * vui, vlib_buffer_t * b,
}
}
+static_always_inline void
+vhost_user_mark_desc_available (vlib_main_t * vm, vhost_user_vring_t * rxvq,
+ u16 * n_descs_processed, u8 chained,
+ vlib_frame_t * frame, u32 n_left)
+{
+ u16 desc_idx, flags;
+ vring_packed_desc_t *desc_table = rxvq->packed_desc;
+ u16 last_used_idx = rxvq->last_used_idx;
+
+ if (PREDICT_FALSE (*n_descs_processed == 0))
+ return;
+
+ if (rxvq->used_wrap_counter)
+ flags = desc_table[last_used_idx & rxvq->qsz_mask].flags |
+ (VIRTQ_DESC_F_AVAIL | VIRTQ_DESC_F_USED);
+ else
+ flags = desc_table[last_used_idx & rxvq->qsz_mask].flags &
+ ~(VIRTQ_DESC_F_AVAIL | VIRTQ_DESC_F_USED);
+
+ vhost_user_advance_last_used_idx (rxvq);
+
+ for (desc_idx = 1; desc_idx < *n_descs_processed; desc_idx++)
+ {
+ if (rxvq->used_wrap_counter)
+ desc_table[rxvq->last_used_idx & rxvq->qsz_mask].flags |=
+ (VIRTQ_DESC_F_AVAIL | VIRTQ_DESC_F_USED);
+ else
+ desc_table[rxvq->last_used_idx & rxvq->qsz_mask].flags &=
+ ~(VIRTQ_DESC_F_AVAIL | VIRTQ_DESC_F_USED);
+ vhost_user_advance_last_used_idx (rxvq);
+ }
+
+ desc_table[last_used_idx & rxvq->qsz_mask].flags = flags;
+
+ *n_descs_processed = 0;
+
+ if (chained)
+ {
+ vring_packed_desc_t *desc_table = rxvq->packed_desc;
+
+ while (desc_table[rxvq->last_used_idx & rxvq->qsz_mask].flags &
+ VIRTQ_DESC_F_NEXT)
+ vhost_user_advance_last_used_idx (rxvq);
+
+ /* Advance past the current chained table entries */
+ vhost_user_advance_last_used_idx (rxvq);
+ }
+
+ /* interrupt (call) handling */
+ if ((rxvq->callfd_idx != ~0) &&
+ (rxvq->avail_event->flags != VRING_EVENT_F_DISABLE))
+ {
+ vhost_user_main_t *vum = &vhost_user_main;
+
+ rxvq->n_since_last_int += frame->n_vectors - n_left;
+ if (rxvq->n_since_last_int > vum->coalesce_frames)
+ vhost_user_send_call (vm, rxvq);
+ }
+}
+
+static_always_inline void
+vhost_user_tx_trace_packed (vhost_trace_t * t, vhost_user_intf_t * vui,
+ u16 qid, vlib_buffer_t * b,
+ vhost_user_vring_t * rxvq)
+{
+ vhost_user_main_t *vum = &vhost_user_main;
+ u32 last_avail_idx = rxvq->last_avail_idx;
+ u32 desc_current = last_avail_idx & rxvq->qsz_mask;
+ vring_packed_desc_t *hdr_desc = 0;
+ u32 hint = 0;
+
+ clib_memset (t, 0, sizeof (*t));
+ t->device_index = vui - vum->vhost_user_interfaces;
+ t->qid = qid;
+
+ hdr_desc = &rxvq->packed_desc[desc_current];
+ if (rxvq->packed_desc[desc_current].flags & VIRTQ_DESC_F_INDIRECT)
+ {
+ t->virtio_ring_flags |= 1 << VIRTIO_TRACE_F_INDIRECT;
+ /* Header is the first here */
+ hdr_desc = map_guest_mem (vui, rxvq->packed_desc[desc_current].addr,
+ &hint);
+ }
+ if (rxvq->packed_desc[desc_current].flags & VIRTQ_DESC_F_NEXT)
+ {
+ t->virtio_ring_flags |= 1 << VIRTIO_TRACE_F_SIMPLE_CHAINED;
+ }
+ if (!(rxvq->packed_desc[desc_current].flags & VIRTQ_DESC_F_NEXT) &&
+ !(rxvq->packed_desc[desc_current].flags & VIRTQ_DESC_F_INDIRECT))
+ {
+ t->virtio_ring_flags |= 1 << VIRTIO_TRACE_F_SINGLE_DESC;
+ }
+
+ t->first_desc_len = hdr_desc ? hdr_desc->len : 0;
+}
+
+static_always_inline uword
+vhost_user_device_class_packed (vlib_main_t * vm, vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ u32 *buffers = vlib_frame_vector_args (frame);
+ u32 n_left = frame->n_vectors;
+ vhost_user_main_t *vum = &vhost_user_main;
+ vnet_interface_output_runtime_t *rd = (void *) node->runtime_data;
+ vhost_user_intf_t *vui =
+ pool_elt_at_index (vum->vhost_user_interfaces, rd->dev_instance);
+ u32 qid;
+ vhost_user_vring_t *rxvq;
+ u8 error;
+ u32 thread_index = vm->thread_index;
+ vhost_cpu_t *cpu = &vum->cpus[thread_index];
+ u32 map_hint = 0;
+ u8 retry = 8;
+ u16 copy_len;
+ u16 tx_headers_len;
+ vring_packed_desc_t *desc_table;
+ u32 or_flags;
+ u16 desc_head, desc_index, desc_len;
+ u16 n_descs_processed;
+ u8 indirect, chained;
+
+ qid = VHOST_VRING_IDX_RX (*vec_elt_at_index (vui->per_cpu_tx_qid,
+ thread_index));
+ rxvq = &vui->vrings[qid];
+
+retry:
+ error = VHOST_USER_TX_FUNC_ERROR_NONE;
+ tx_headers_len = 0;
+ copy_len = 0;
+ n_descs_processed = 0;
+
+ while (n_left > 0)
+ {
+ vlib_buffer_t *b0, *current_b0;
+ uword buffer_map_addr;
+ u32 buffer_len;
+ u16 bytes_left;
+ u32 total_desc_len = 0;
+ u16 n_entries = 0;
+
+ indirect = 0;
+ chained = 0;
+ if (PREDICT_TRUE (n_left > 1))
+ vlib_prefetch_buffer_with_index (vm, buffers[1], LOAD);
+
+ b0 = vlib_get_buffer (vm, buffers[0]);
+ if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ cpu->current_trace = vlib_add_trace (vm, node, b0,
+ sizeof (*cpu->current_trace));
+ vhost_user_tx_trace_packed (cpu->current_trace, vui, qid / 2, b0,
+ rxvq);
+ }
+
+ desc_table = rxvq->packed_desc;
+ desc_head = desc_index = rxvq->last_avail_idx & rxvq->qsz_mask;
+ if (PREDICT_FALSE (!vhost_user_packed_desc_available (rxvq, desc_head)))
+ {
+ error = VHOST_USER_TX_FUNC_ERROR_PKT_DROP_NOBUF;
+ goto done;
+ }
+ /*
+ * Go deeper in case of indirect descriptor.
+ * To test it, turn off mrg_rxbuf.
+ */
+ if (desc_table[desc_head].flags & VIRTQ_DESC_F_INDIRECT)
+ {
+ indirect = 1;
+ if (PREDICT_FALSE (desc_table[desc_head].len <
+ sizeof (vring_packed_desc_t)))
+ {
+ error = VHOST_USER_TX_FUNC_ERROR_INDIRECT_OVERFLOW;
+ goto done;
+ }
+ n_entries = desc_table[desc_head].len >> 4;
+ desc_table = map_guest_mem (vui, desc_table[desc_index].addr,
+ &map_hint);
+ if (PREDICT_FALSE (desc_table == 0))
+ {
+ error = VHOST_USER_TX_FUNC_ERROR_MMAP_FAIL;
+ goto done;
+ }
+ desc_index = 0;
+ }
+ else if (rxvq->packed_desc[desc_head].flags & VIRTQ_DESC_F_NEXT)
+ chained = 1;
+
+ desc_len = vui->virtio_net_hdr_sz;
+ buffer_map_addr = desc_table[desc_index].addr;
+ buffer_len = desc_table[desc_index].len;
+
+ /* Get a header from the header array */
+ virtio_net_hdr_mrg_rxbuf_t *hdr = &cpu->tx_headers[tx_headers_len];
+ tx_headers_len++;
+ hdr->hdr.flags = 0;
+ hdr->hdr.gso_type = VIRTIO_NET_HDR_GSO_NONE;
+ hdr->num_buffers = 1;
+
+ or_flags = (b0->flags & VNET_BUFFER_F_OFFLOAD_IP_CKSUM) ||
+ (b0->flags & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM) ||
+ (b0->flags & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM);
+
+ /* Guest supports csum offload and buffer requires checksum offload? */
+ if (or_flags &&
+ (vui->features & (1ULL << FEAT_VIRTIO_NET_F_GUEST_CSUM)))
+ vhost_user_handle_tx_offload (vui, b0, &hdr->hdr);
+
+ /* Prepare a copy order executed later for the header */
+ ASSERT (copy_len < VHOST_USER_COPY_ARRAY_N);
+ vhost_copy_t *cpy = &cpu->copy[copy_len];
+ copy_len++;
+ cpy->len = vui->virtio_net_hdr_sz;
+ cpy->dst = buffer_map_addr;
+ cpy->src = (uword) hdr;
+
+ buffer_map_addr += vui->virtio_net_hdr_sz;
+ buffer_len -= vui->virtio_net_hdr_sz;
+ bytes_left = b0->current_length;
+ current_b0 = b0;
+ while (1)
+ {
+ if (buffer_len == 0)
+ {
+ /* Get new output */
+ if (chained)
+ {
+ /*
+ * Next one is chained
+ * Test it with both indirect and mrg_rxbuf off
+ */
+ if (PREDICT_FALSE (!(desc_table[desc_index].flags &
+ VIRTQ_DESC_F_NEXT)))
+ {
+ /*
+ * Last descriptor in chain.
+ * Dequeue queued descriptors for this packet
+ */
+ vhost_user_dequeue_chained_descs (rxvq,
+ &n_descs_processed);
+ error = VHOST_USER_TX_FUNC_ERROR_PKT_DROP_NOBUF;
+ goto done;
+ }
+ vhost_user_advance_last_avail_idx (rxvq);
+ desc_index = rxvq->last_avail_idx & rxvq->qsz_mask;
+ n_descs_processed++;
+ buffer_map_addr = desc_table[desc_index].addr;
+ buffer_len = desc_table[desc_index].len;
+ total_desc_len += desc_len;
+ desc_len = 0;
+ }
+ else if (indirect)
+ {
+ /*
+ * Indirect table
+ * Test it with mrg_rxnuf off
+ */
+ if (PREDICT_TRUE (n_entries > 0))
+ n_entries--;
+ else
+ {
+ /* Dequeue queued descriptors for this packet */
+ vhost_user_dequeue_chained_descs (rxvq,
+ &n_descs_processed);
+ error = VHOST_USER_TX_FUNC_ERROR_INDIRECT_OVERFLOW;
+ goto done;
+ }
+ total_desc_len += desc_len;
+ desc_index = (desc_index + 1) & rxvq->qsz_mask;
+ buffer_map_addr = desc_table[desc_index].addr;
+ buffer_len = desc_table[desc_index].len;
+ desc_len = 0;
+ }
+ else if (vui->virtio_net_hdr_sz == 12)
+ {
+ /*
+ * MRG is available
+ * This is the default setting for the guest VM
+ */
+ virtio_net_hdr_mrg_rxbuf_t *hdr =
+ &cpu->tx_headers[tx_headers_len - 1];
+
+ desc_table[desc_index].len = desc_len;
+ vhost_user_advance_last_avail_idx (rxvq);
+ desc_head = desc_index =
+ rxvq->last_avail_idx & rxvq->qsz_mask;
+ hdr->num_buffers++;
+ n_descs_processed++;
+ desc_len = 0;
+
+ if (PREDICT_FALSE (!vhost_user_packed_desc_available
+ (rxvq, desc_index)))
+ {
+ /* Dequeue queued descriptors for this packet */
+ vhost_user_dequeue_descs (rxvq, hdr,
+ &n_descs_processed);
+ error = VHOST_USER_TX_FUNC_ERROR_PKT_DROP_NOBUF;
+ goto done;
+ }
+
+ buffer_map_addr = desc_table[desc_index].addr;
+ buffer_len = desc_table[desc_index].len;
+ }
+ else
+ {
+ error = VHOST_USER_TX_FUNC_ERROR_PKT_DROP_NOMRG;
+ goto done;
+ }
+ }
+
+ ASSERT (copy_len < VHOST_USER_COPY_ARRAY_N);
+ vhost_copy_t *cpy = &cpu->copy[copy_len];
+ copy_len++;
+ cpy->len = bytes_left;
+ cpy->len = (cpy->len > buffer_len) ? buffer_len : cpy->len;
+ cpy->dst = buffer_map_addr;
+ cpy->src = (uword) vlib_buffer_get_current (current_b0) +
+ current_b0->current_length - bytes_left;
+
+ bytes_left -= cpy->len;
+ buffer_len -= cpy->len;
+ buffer_map_addr += cpy->len;
+ desc_len += cpy->len;
+
+ CLIB_PREFETCH (&rxvq->packed_desc, CLIB_CACHE_LINE_BYTES, LOAD);
+
+ /* Check if vlib buffer has more data. If not, get more or break */
+ if (PREDICT_TRUE (!bytes_left))
+ {
+ if (PREDICT_FALSE
+ (current_b0->flags & VLIB_BUFFER_NEXT_PRESENT))
+ {
+ current_b0 = vlib_get_buffer (vm, current_b0->next_buffer);
+ bytes_left = current_b0->current_length;
+ }
+ else
+ {
+ /* End of packet */
+ break;
+ }
+ }
+ }
+
+ /* Move from available to used ring */
+ total_desc_len += desc_len;
+ rxvq->packed_desc[desc_head].len = total_desc_len;
+
+ vhost_user_advance_last_avail_table_idx (vui, rxvq, chained);
+ n_descs_processed++;
+
+ if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
+ cpu->current_trace->hdr = cpu->tx_headers[tx_headers_len - 1];
+
+ n_left--;
+
+ /*
+ * Do the copy periodically to prevent
+ * cpu->copy array overflow and corrupt memory
+ */
+ if (PREDICT_FALSE (copy_len >= VHOST_USER_TX_COPY_THRESHOLD) || chained)
+ {
+ if (PREDICT_FALSE (vhost_user_tx_copy (vui, cpu->copy, copy_len,
+ &map_hint)))
+ vlib_error_count (vm, node->node_index,
+ VHOST_USER_TX_FUNC_ERROR_MMAP_FAIL, 1);
+ copy_len = 0;
+
+ /* give buffers back to driver */
+ vhost_user_mark_desc_available (vm, rxvq, &n_descs_processed,
+ chained, frame, n_left);
+ }
+
+ buffers++;
+ }
+
+done:
+ if (PREDICT_TRUE (copy_len))
+ {
+ if (PREDICT_FALSE (vhost_user_tx_copy (vui, cpu->copy, copy_len,
+ &map_hint)))
+ vlib_error_count (vm, node->node_index,
+ VHOST_USER_TX_FUNC_ERROR_MMAP_FAIL, 1);
+
+ vhost_user_mark_desc_available (vm, rxvq, &n_descs_processed, chained,
+ frame, n_left);
+ }
+
+ /*
+ * When n_left is set, error is always set to something too.
+ * In case error is due to lack of remaining buffers, we go back up and
+ * retry.
+ * The idea is that it is better to waste some time on packets
+ * that have been processed already than dropping them and get
+ * more fresh packets with a good likelyhood that they will be dropped too.
+ * This technique also gives more time to VM driver to pick-up packets.
+ * In case the traffic flows from physical to virtual interfaces, this
+ * technique will end-up leveraging the physical NIC buffer in order to
+ * absorb the VM's CPU jitter.
+ */
+ if (n_left && (error == VHOST_USER_TX_FUNC_ERROR_PKT_DROP_NOBUF) && retry)
+ {
+ retry--;
+ goto retry;
+ }
+
+ vhost_user_vring_unlock (vui, qid);
+
+ if (PREDICT_FALSE (n_left && error != VHOST_USER_TX_FUNC_ERROR_NONE))
+ {
+ vlib_error_count (vm, node->node_index, error, n_left);
+ vlib_increment_simple_counter
+ (vnet_main.interface_main.sw_if_counters +
+ VNET_INTERFACE_COUNTER_DROP, thread_index, vui->sw_if_index, n_left);
+ }
+
+ vlib_buffer_free (vm, vlib_frame_vector_args (frame), frame->n_vectors);
+ return frame->n_vectors;
+}
+
VNET_DEVICE_CLASS_TX_FN (vhost_user_device_class) (vlib_main_t * vm,
vlib_node_runtime_t *
node, vlib_frame_t * frame)
@@ -339,6 +757,9 @@ VNET_DEVICE_CLASS_TX_FN (vhost_user_device_class) (vlib_main_t * vm,
if (PREDICT_FALSE (vui->use_tx_spinlock))
vhost_user_vring_lock (vui, qid);
+ if (vhost_user_is_packed_ring_supported (vui))
+ return (vhost_user_device_class_packed (vm, node, frame));
+
retry:
error = VHOST_USER_TX_FUNC_ERROR_NONE;
tx_headers_len = 0;