#include <vlib/vlib.h>
#include <vlib/unix/unix.h>
#include <vlib/pci/pci.h>
+#include <vppinfra/ring.h>
+
#include <vnet/ethernet/ethernet.h>
+#include <vnet/ip/ip4_packet.h>
+#include <vnet/ip/ip6_packet.h>
+#include <vnet/udp/udp_packet.h>
+#include <vnet/tcp/tcp_packet.h>
+
#include <vnet/devices/devices.h>
#include <avf/avf.h>
-#define AVF_TXQ_DESC_CMD(x) (1 << (x + 4))
-#define AVF_TXQ_DESC_CMD_EOP AVF_TXQ_DESC_CMD(0)
-#define AVF_TXQ_DESC_CMD_RS AVF_TXQ_DESC_CMD(1)
-#define AVF_TXQ_DESC_CMD_RSV AVF_TXQ_DESC_CMD(2)
-
static_always_inline u8
avf_tx_desc_get_dtyp (avf_tx_desc_t * d)
{
return d->qword[1] & 0x0f;
}
-uword
-CLIB_MULTIARCH_FN (avf_interface_tx) (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
+struct avf_ip4_psh
+{
+ u32 src;
+ u32 dst;
+ u8 zero;
+ u8 proto;
+ u16 l4len;
+};
+
+struct avf_ip6_psh
+{
+ ip6_address_t src;
+ ip6_address_t dst;
+ u32 l4len;
+ u32 proto;
+};
+
+static_always_inline u64
+avf_tx_prepare_cksum (vlib_buffer_t * b, u8 is_tso)
+{
+ u64 flags = 0;
+ if (!is_tso && !(b->flags & VNET_BUFFER_F_OFFLOAD))
+ return 0;
+
+ u32 oflags = vnet_buffer2 (b)->oflags;
+ u32 is_tcp = is_tso || oflags & VNET_BUFFER_OFFLOAD_F_TCP_CKSUM;
+ u32 is_udp = !is_tso && oflags & VNET_BUFFER_OFFLOAD_F_UDP_CKSUM;
+ u32 is_ip4 = b->flags & VNET_BUFFER_F_IS_IP4;
+ u32 is_ip6 = b->flags & VNET_BUFFER_F_IS_IP6;
+ ASSERT (!is_tcp || !is_udp);
+ ASSERT (is_ip4 || is_ip6);
+ i16 l2_hdr_offset = b->current_data;
+ i16 l3_hdr_offset = vnet_buffer (b)->l3_hdr_offset;
+ i16 l4_hdr_offset = vnet_buffer (b)->l4_hdr_offset;
+ u16 l2_len = l3_hdr_offset - l2_hdr_offset;
+ u16 l3_len = l4_hdr_offset - l3_hdr_offset;
+ ip4_header_t *ip4 = (void *) (b->data + l3_hdr_offset);
+ ip6_header_t *ip6 = (void *) (b->data + l3_hdr_offset);
+ tcp_header_t *tcp = (void *) (b->data + l4_hdr_offset);
+ udp_header_t *udp = (void *) (b->data + l4_hdr_offset);
+ u16 l4_len =
+ is_tcp ? tcp_header_bytes (tcp) : is_udp ? sizeof (udp_header_t) : 0;
+ u16 sum = 0;
+
+ flags |= AVF_TXD_OFFSET_MACLEN (l2_len) |
+ AVF_TXD_OFFSET_IPLEN (l3_len) | AVF_TXD_OFFSET_L4LEN (l4_len);
+ flags |= is_ip4 ? AVF_TXD_CMD_IIPT_IPV4 : AVF_TXD_CMD_IIPT_IPV6;
+ flags |= is_tcp ? AVF_TXD_CMD_L4T_TCP : is_udp ? AVF_TXD_CMD_L4T_UDP : 0;
+
+ if (is_ip4)
+ ip4->checksum = 0;
+
+ if (is_tso)
+ {
+ if (is_ip4)
+ ip4->length = 0;
+ else
+ ip6->payload_length = 0;
+ }
+
+ if (is_tcp || is_udp)
+ {
+ if (is_ip4)
+ {
+ struct avf_ip4_psh psh = { 0 };
+ psh.src = ip4->src_address.as_u32;
+ psh.dst = ip4->dst_address.as_u32;
+ psh.proto = ip4->protocol;
+ psh.l4len =
+ is_tso ? 0 :
+ clib_host_to_net_u16 (clib_net_to_host_u16 (ip4->length) -
+ (l4_hdr_offset - l3_hdr_offset));
+ sum = ~ip_csum (&psh, sizeof (psh));
+ }
+ else
+ {
+ struct avf_ip6_psh psh = { 0 };
+ psh.src = ip6->src_address;
+ psh.dst = ip6->dst_address;
+ psh.proto = clib_host_to_net_u32 ((u32) ip6->protocol);
+ psh.l4len = is_tso ? 0 : ip6->payload_length;
+ sum = ~ip_csum (&psh, sizeof (psh));
+ }
+ }
+ /* ip_csum does a byte swap for some reason... */
+ sum = clib_net_to_host_u16 (sum);
+ if (is_tcp)
+ tcp->checksum = sum;
+ else if (is_udp)
+ udp->checksum = sum;
+ return flags;
+}
+
+static_always_inline u32
+avf_tx_fill_ctx_desc (vlib_main_t *vm, avf_txq_t *txq, avf_tx_desc_t *d,
+ vlib_buffer_t *b)
+{
+ vlib_buffer_t *ctx_ph;
+ u32 *bi = txq->ph_bufs;
+
+next:
+ ctx_ph = vlib_get_buffer (vm, bi[0]);
+ if (PREDICT_FALSE (ctx_ph->ref_count == 255))
+ {
+ bi++;
+ goto next;
+ }
+
+ /* Acquire a reference on the placeholder buffer */
+ ctx_ph->ref_count++;
+
+ u16 l234hdr_sz = vnet_buffer (b)->l4_hdr_offset - b->current_data +
+ vnet_buffer2 (b)->gso_l4_hdr_sz;
+ u16 tlen = vlib_buffer_length_in_chain (vm, b) - l234hdr_sz;
+ d[0].qword[0] = 0;
+ d[0].qword[1] = AVF_TXD_DTYP_CTX | AVF_TXD_CTX_CMD_TSO
+ | AVF_TXD_CTX_SEG_MSS (vnet_buffer2 (b)->gso_size) |
+ AVF_TXD_CTX_SEG_TLEN (tlen);
+ return bi[0];
+}
+
+static_always_inline void
+avf_tx_copy_desc (avf_tx_desc_t *d, avf_tx_desc_t *s, u32 n_descs)
+{
+#if defined CLIB_HAVE_VEC512
+ while (n_descs >= 8)
+ {
+ u64x8u *dv = (u64x8u *) d;
+ u64x8u *sv = (u64x8u *) s;
+
+ dv[0] = sv[0];
+ dv[1] = sv[1];
+
+ /* next */
+ d += 8;
+ s += 8;
+ n_descs -= 8;
+ }
+#elif defined CLIB_HAVE_VEC256
+ while (n_descs >= 4)
+ {
+ u64x4u *dv = (u64x4u *) d;
+ u64x4u *sv = (u64x4u *) s;
+
+ dv[0] = sv[0];
+ dv[1] = sv[1];
+
+ /* next */
+ d += 4;
+ s += 4;
+ n_descs -= 4;
+ }
+#elif defined CLIB_HAVE_VEC128
+ while (n_descs >= 2)
+ {
+ u64x2u *dv = (u64x2u *) d;
+ u64x2u *sv = (u64x2u *) s;
+
+ dv[0] = sv[0];
+ dv[1] = sv[1];
+
+ /* next */
+ d += 2;
+ s += 2;
+ n_descs -= 2;
+ }
+#endif
+ while (n_descs)
+ {
+ d[0].qword[0] = s[0].qword[0];
+ d[0].qword[1] = s[0].qword[1];
+ d++;
+ s++;
+ n_descs--;
+ }
+}
+
+static_always_inline void
+avf_tx_fill_data_desc (vlib_main_t *vm, avf_tx_desc_t *d, vlib_buffer_t *b,
+ u64 cmd, int use_va_dma)
+{
+ if (use_va_dma)
+ d->qword[0] = vlib_buffer_get_current_va (b);
+ else
+ d->qword[0] = vlib_buffer_get_current_pa (vm, b);
+ d->qword[1] = (((u64) b->current_length) << 34 | cmd | AVF_TXD_CMD_RSV);
+}
+static_always_inline u16
+avf_tx_prepare (vlib_main_t *vm, vlib_node_runtime_t *node, avf_txq_t *txq,
+ u32 *buffers, u32 n_packets, u16 *n_enq_descs, int use_va_dma)
+{
+ const u64 cmd_eop = AVF_TXD_CMD_EOP;
+ u16 n_free_desc, n_desc_left, n_packets_left = n_packets;
+ vlib_buffer_t *b[4];
+ avf_tx_desc_t *d = txq->tmp_descs;
+ u32 *tb = txq->tmp_bufs;
+
+ n_free_desc = n_desc_left = txq->size - txq->n_enqueued - 8;
+
+ if (n_desc_left == 0)
+ return 0;
+
+ while (n_packets_left && n_desc_left)
+ {
+ u32 flags, or_flags;
+
+ if (n_packets_left < 8 || n_desc_left < 4)
+ goto one_by_one;
+
+ vlib_prefetch_buffer_with_index (vm, buffers[4], LOAD);
+ vlib_prefetch_buffer_with_index (vm, buffers[5], LOAD);
+ vlib_prefetch_buffer_with_index (vm, buffers[6], LOAD);
+ vlib_prefetch_buffer_with_index (vm, buffers[7], LOAD);
+
+ b[0] = vlib_get_buffer (vm, buffers[0]);
+ b[1] = vlib_get_buffer (vm, buffers[1]);
+ b[2] = vlib_get_buffer (vm, buffers[2]);
+ b[3] = vlib_get_buffer (vm, buffers[3]);
+
+ or_flags = b[0]->flags | b[1]->flags | b[2]->flags | b[3]->flags;
+
+ if (PREDICT_FALSE (or_flags &
+ (VLIB_BUFFER_NEXT_PRESENT | VNET_BUFFER_F_OFFLOAD |
+ VNET_BUFFER_F_GSO)))
+ goto one_by_one;
+
+ vlib_buffer_copy_indices (tb, buffers, 4);
+
+ avf_tx_fill_data_desc (vm, d + 0, b[0], cmd_eop, use_va_dma);
+ avf_tx_fill_data_desc (vm, d + 1, b[1], cmd_eop, use_va_dma);
+ avf_tx_fill_data_desc (vm, d + 2, b[2], cmd_eop, use_va_dma);
+ avf_tx_fill_data_desc (vm, d + 3, b[3], cmd_eop, use_va_dma);
+
+ buffers += 4;
+ n_packets_left -= 4;
+ n_desc_left -= 4;
+ d += 4;
+ tb += 4;
+ continue;
+
+ one_by_one:
+ tb[0] = buffers[0];
+ b[0] = vlib_get_buffer (vm, buffers[0]);
+ flags = b[0]->flags;
+
+ /* No chained buffers or TSO case */
+ if (PREDICT_TRUE (
+ (flags & (VLIB_BUFFER_NEXT_PRESENT | VNET_BUFFER_F_GSO)) == 0))
+ {
+ u64 cmd = cmd_eop;
+
+ if (PREDICT_FALSE (flags & VNET_BUFFER_F_OFFLOAD))
+ cmd |= avf_tx_prepare_cksum (b[0], 0 /* is_tso */);
+
+ avf_tx_fill_data_desc (vm, d, b[0], cmd, use_va_dma);
+ }
+ else
+ {
+ u16 n_desc_needed = 1;
+ u64 cmd = 0;
+
+ if (flags & VLIB_BUFFER_NEXT_PRESENT)
+ {
+ vlib_buffer_t *next = vlib_get_buffer (vm, b[0]->next_buffer);
+ n_desc_needed = 2;
+ while (next->flags & VLIB_BUFFER_NEXT_PRESENT)
+ {
+ next = vlib_get_buffer (vm, next->next_buffer);
+ n_desc_needed++;
+ }
+ }
+
+ if (flags & VNET_BUFFER_F_GSO)
+ {
+ n_desc_needed++;
+ }
+ else if (PREDICT_FALSE (n_desc_needed > 8))
+ {
+ vlib_buffer_free_one (vm, buffers[0]);
+ vlib_error_count (vm, node->node_index,
+ AVF_TX_ERROR_SEGMENT_SIZE_EXCEEDED, 1);
+ n_packets_left -= 1;
+ buffers += 1;
+ continue;
+ }
+
+ if (PREDICT_FALSE (n_desc_left < n_desc_needed))
+ break;
+
+ if (flags & VNET_BUFFER_F_GSO)
+ {
+ /* Enqueue a context descriptor */
+ tb[1] = tb[0];
+ tb[0] = avf_tx_fill_ctx_desc (vm, txq, d, b[0]);
+ n_desc_left -= 1;
+ d += 1;
+ tb += 1;
+ cmd = avf_tx_prepare_cksum (b[0], 1 /* is_tso */);
+ }
+ else if (flags & VNET_BUFFER_F_OFFLOAD)
+ {
+ cmd = avf_tx_prepare_cksum (b[0], 0 /* is_tso */);
+ }
+
+ /* Deal with chain buffer if present */
+ while (b[0]->flags & VLIB_BUFFER_NEXT_PRESENT)
+ {
+ avf_tx_fill_data_desc (vm, d, b[0], cmd, use_va_dma);
+
+ n_desc_left -= 1;
+ d += 1;
+ tb += 1;
+
+ tb[0] = b[0]->next_buffer;
+ b[0] = vlib_get_buffer (vm, b[0]->next_buffer);
+ }
+
+ avf_tx_fill_data_desc (vm, d, b[0], cmd_eop | cmd, use_va_dma);
+ }
+
+ buffers += 1;
+ n_packets_left -= 1;
+ n_desc_left -= 1;
+ d += 1;
+ tb += 1;
+ }
+
+ *n_enq_descs = n_free_desc - n_desc_left;
+ return n_packets - n_packets_left;
+}
+
+VNET_DEVICE_CLASS_TX_FN (avf_device_class) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
{
- avf_main_t *am = &avf_main;
vnet_interface_output_runtime_t *rd = (void *) node->runtime_data;
- avf_device_t *ad = pool_elt_at_index (am->devices, rd->dev_instance);
+ avf_device_t *ad = avf_get_device (rd->dev_instance);
u32 thread_index = vm->thread_index;
u8 qid = thread_index;
avf_txq_t *txq = vec_elt_at_index (ad->txqs, qid % ad->num_queue_pairs);
- avf_tx_desc_t *d0, *d1, *d2, *d3;
- u32 *buffers = vlib_frame_args (frame);
- u32 bi0, bi1, bi2, bi3;
- u16 n_left = frame->n_vectors;
- vlib_buffer_t *b0, *b1, *b2, *b3;
+ u16 next = txq->next;
u16 mask = txq->size - 1;
- u64 bits = (AVF_TXQ_DESC_CMD_EOP | AVF_TXQ_DESC_CMD_RS |
- AVF_TXQ_DESC_CMD_RSV);
+ u32 *buffers = vlib_frame_vector_args (frame);
+ u16 n_enq, n_left, n_desc, *slot;
+ u16 n_retry = 2;
clib_spinlock_lock_if_init (&txq->lock);
- /* release cosumed bufs */
+ n_left = frame->n_vectors;
+
+retry:
+ /* release consumed bufs */
if (txq->n_enqueued)
{
- u16 first, slot, n_free = 0;
- first = slot = (txq->next - txq->n_enqueued) & mask;
- d0 = txq->descs + slot;
- while (n_free < txq->n_enqueued && avf_tx_desc_get_dtyp (d0) == 0x0F)
+ i32 complete_slot = -1;
+ while (1)
{
- n_free++;
- slot = (slot + 1) & mask;
- d0 = txq->descs + slot;
+ u16 *slot = clib_ring_get_first (txq->rs_slots);
+
+ if (slot == 0)
+ break;
+
+ if (avf_tx_desc_get_dtyp (txq->descs + slot[0]) != 0x0F)
+ break;
+
+ complete_slot = slot[0];
+
+ clib_ring_deq (txq->rs_slots);
}
- if (n_free)
+ if (complete_slot >= 0)
{
+ u16 first, mask, n_free;
+ mask = txq->size - 1;
+ first = (txq->next - txq->n_enqueued) & mask;
+ n_free = (complete_slot + 1 - first) & mask;
+
txq->n_enqueued -= n_free;
- vlib_buffer_free_from_ring (vm, txq->bufs, first, txq->size,
- n_free);
+ vlib_buffer_free_from_ring_no_next (vm, txq->bufs, first, txq->size,
+ n_free);
}
}
- while (n_left >= 8)
- {
- u16 slot0, slot1, slot2, slot3;
+ n_desc = 0;
+ if (ad->flags & AVF_DEVICE_F_VA_DMA)
+ n_enq = avf_tx_prepare (vm, node, txq, buffers, n_left, &n_desc, 1);
+ else
+ n_enq = avf_tx_prepare (vm, node, txq, buffers, n_left, &n_desc, 0);
- vlib_prefetch_buffer_with_index (vm, buffers[4], LOAD);
- vlib_prefetch_buffer_with_index (vm, buffers[5], LOAD);
- vlib_prefetch_buffer_with_index (vm, buffers[6], LOAD);
- vlib_prefetch_buffer_with_index (vm, buffers[7], LOAD);
-
- slot0 = txq->next;
- slot1 = (txq->next + 1) & mask;
- slot2 = (txq->next + 2) & mask;
- slot3 = (txq->next + 3) & mask;
-
- d0 = txq->descs + slot0;
- d1 = txq->descs + slot1;
- d2 = txq->descs + slot2;
- d3 = txq->descs + slot3;
-
- bi0 = buffers[0];
- bi1 = buffers[1];
- bi2 = buffers[2];
- bi3 = buffers[3];
-
- txq->bufs[slot0] = bi0;
- txq->bufs[slot1] = bi1;
- txq->bufs[slot2] = bi2;
- txq->bufs[slot3] = bi3;
- b0 = vlib_get_buffer (vm, bi0);
- b1 = vlib_get_buffer (vm, bi1);
- b2 = vlib_get_buffer (vm, bi2);
- b3 = vlib_get_buffer (vm, bi3);
-
-#if 0
- d->qword[0] = vlib_get_buffer_data_physical_address (vm, bi0) +
- b0->current_data;
-#else
- d0->qword[0] = pointer_to_uword (b0->data) + b0->current_data;
- d1->qword[0] = pointer_to_uword (b1->data) + b1->current_data;
- d2->qword[0] = pointer_to_uword (b2->data) + b2->current_data;
- d3->qword[0] = pointer_to_uword (b3->data) + b3->current_data;
+ if (n_desc)
+ {
+ if (PREDICT_TRUE (next + n_desc <= txq->size))
+ {
+ /* no wrap */
+ avf_tx_copy_desc (txq->descs + next, txq->tmp_descs, n_desc);
+ vlib_buffer_copy_indices (txq->bufs + next, txq->tmp_bufs, n_desc);
+ }
+ else
+ {
+ /* wrap */
+ u32 n_not_wrap = txq->size - next;
+ avf_tx_copy_desc (txq->descs + next, txq->tmp_descs, n_not_wrap);
+ avf_tx_copy_desc (txq->descs, txq->tmp_descs + n_not_wrap,
+ n_desc - n_not_wrap);
+ vlib_buffer_copy_indices (txq->bufs + next, txq->tmp_bufs,
+ n_not_wrap);
+ vlib_buffer_copy_indices (txq->bufs, txq->tmp_bufs + n_not_wrap,
+ n_desc - n_not_wrap);
+ }
-#endif
- d0->qword[1] = ((u64) b0->current_length) << 34 | bits;
- d1->qword[1] = ((u64) b1->current_length) << 34 | bits;
- d2->qword[1] = ((u64) b2->current_length) << 34 | bits;
- d3->qword[1] = ((u64) b3->current_length) << 34 | bits;
+ next += n_desc;
+ if ((slot = clib_ring_enq (txq->rs_slots)))
+ {
+ u16 rs_slot = slot[0] = (next - 1) & mask;
+ txq->descs[rs_slot].qword[1] |= AVF_TXD_CMD_RS;
+ }
- txq->next = (txq->next + 4) & mask;
- txq->n_enqueued += 4;
- buffers += 4;
- n_left -= 4;
+ txq->next = next & mask;
+ avf_tail_write (txq->qtx_tail, txq->next);
+ txq->n_enqueued += n_desc;
+ n_left -= n_enq;
}
- while (n_left)
+ if (n_left)
{
- d0 = txq->descs + txq->next;
- bi0 = buffers[0];
- txq->bufs[txq->next] = bi0;
- b0 = vlib_get_buffer (vm, bi0);
-
-#if 0
- d->qword[0] = vlib_get_buffer_data_physical_address (vm, bi0) +
- b0->current_data;
-#else
- d0->qword[0] = pointer_to_uword (b0->data) + b0->current_data;
-#endif
- d0->qword[1] = (((u64) b0->current_length) << 34) | bits;
+ buffers += n_enq;
+
+ if (n_retry--)
+ goto retry;
- txq->next = (txq->next + 1) & mask;
- txq->n_enqueued++;
- buffers++;
- n_left--;
+ vlib_buffer_free (vm, buffers, n_left);
+ vlib_error_count (vm, node->node_index,
+ AVF_TX_ERROR_NO_FREE_SLOTS, n_left);
}
- CLIB_MEMORY_BARRIER ();
- *(txq->qtx_tail) = txq->next;
clib_spinlock_unlock_if_init (&txq->lock);
return frame->n_vectors - n_left;
}
-#ifndef CLIB_MARCH_VARIANT
-#if __x86_64__
-vlib_node_function_t __clib_weak avf_interface_tx_avx512;
-vlib_node_function_t __clib_weak avf_interface_tx_avx2;
-static void __clib_constructor
-avf_interface_tx_multiarch_select (void)
-{
- if (avf_interface_tx_avx512 && clib_cpu_supports_avx512f ())
- avf_device_class.tx_function = avf_interface_tx_avx512;
- else if (avf_interface_tx_avx2 && clib_cpu_supports_avx2 ())
- avf_device_class.tx_function = avf_interface_tx_avx2;
-}
-#endif
-#endif
-
/*
* fd.io coding-style-patch-verification: ON
*
Code Review / vpp.git / blobdiff