* Allocate/free network buffers.
*/
+#if DPDK > 0
+#include <rte_config.h>
+
+#include <rte_common.h>
+#include <rte_log.h>
+#include <rte_memory.h>
+#include <rte_memzone.h>
+#include <rte_tailq.h>
+#include <rte_eal.h>
+#include <rte_per_lcore.h>
+#include <rte_launch.h>
+#include <rte_atomic.h>
+#include <rte_cycles.h>
+#include <rte_prefetch.h>
+#include <rte_lcore.h>
+#include <rte_per_lcore.h>
+#include <rte_branch_prediction.h>
+#include <rte_interrupts.h>
+#include <rte_pci.h>
+#include <rte_random.h>
+#include <rte_debug.h>
+#include <rte_ether.h>
+#include <rte_ethdev.h>
+#include <rte_ring.h>
+#include <rte_mempool.h>
+#include <rte_mbuf.h>
+#include <rte_version.h>
+#endif
+
#include <vlib/vlib.h>
+#if DPDK > 0
+#pragma weak rte_mem_virt2phy
+#pragma weak rte_eal_has_hugepages
+#pragma weak rte_socket_id
+#pragma weak rte_pktmbuf_pool_create
+#endif
+
uword
vlib_buffer_length_in_chain_slow_path (vlib_main_t * vm,
vlib_buffer_t * b_first)
format_vlib_buffer (u8 * s, va_list * args)
{
vlib_buffer_t *b = va_arg (*args, vlib_buffer_t *);
+#if DPDK > 0
+ uword indent = format_get_indent (s);
+
+ s = format (s, "current data %d, length %d, free-list %d",
+ b->current_data, b->current_length, b->free_list_index);
+
+ if (b->flags & VLIB_BUFFER_TOTAL_LENGTH_VALID)
+ s = format (s, ", totlen-nifb %d",
+ b->total_length_not_including_first_buffer);
+
+ if (b->flags & VLIB_BUFFER_IS_TRACED)
+ s = format (s, ", trace 0x%x", b->trace_index);
+
+ while (b->flags & VLIB_BUFFER_NEXT_PRESENT)
+ {
+ vlib_main_t *vm = vlib_get_main ();
+ u32 next_buffer = b->next_buffer;
+ b = vlib_get_buffer (vm, next_buffer);
+
+ s = format (s, "\n%Unext-buffer 0x%x, segment length %d",
+ format_white_space, indent, next_buffer, b->current_length);
+ }
+
+#else
s = format (s, "current data %d, length %d, free-list %d",
b->current_data, b->current_length, b->free_list_index);
if (b->flags & VLIB_BUFFER_NEXT_PRESENT)
s = format (s, ", next-buffer 0x%x", b->next_buffer);
+#endif
return s;
}
return s;
}
+#if DPDK == 0
static u8 *
format_vlib_buffer_known_state (u8 * s, va_list * args)
{
return format (s, "%s", t);
}
+#endif
u8 *
format_vlib_buffer_contents (u8 * s, va_list * va)
return s;
}
+#if DPDK == 0
static u8 *
vlib_validate_buffer_helper (vlib_main_t * vm,
u32 bi,
hash_free (hash);
return result;
}
+#endif
vlib_main_t **vlib_mains;
+#if DPDK == 0
/* When dubugging validate that given buffers are either known allocated
or known free. */
static void
}
}
+#endif
/* Aligned copy routine. */
void
vlib_aligned_memcpy (void *_dst, void *_src, int n_bytes)
{
vlib_buffer_main_t *bm = vm->buffer_main;
vlib_buffer_free_list_t *f;
+#if DPDK > 0
+ int i;
+
+ ASSERT (os_get_cpu_number () == 0);
+
+ if (!is_default && pool_elts (bm->buffer_free_list_pool) == 0)
+ {
+ u32 default_free_free_list_index;
+
+ /* *INDENT-OFF* */
+ default_free_free_list_index =
+ vlib_buffer_create_free_list_helper
+ (vm,
+ /* default buffer size */ VLIB_BUFFER_DEFAULT_FREE_LIST_BYTES,
+ /* is_public */ 1,
+ /* is_default */ 1,
+ (u8 *) "default");
+ /* *INDENT-ON* */
+ ASSERT (default_free_free_list_index ==
+ VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
+
+ if (n_data_bytes == VLIB_BUFFER_DEFAULT_FREE_LIST_BYTES && is_public)
+ return default_free_free_list_index;
+ }
+
+ pool_get_aligned (bm->buffer_free_list_pool, f, CLIB_CACHE_LINE_BYTES);
+
+ memset (f, 0, sizeof (f[0]));
+ f->index = f - bm->buffer_free_list_pool;
+ f->n_data_bytes = vlib_buffer_round_size (n_data_bytes);
+ f->min_n_buffers_each_physmem_alloc = 16;
+ f->name = clib_mem_is_heap_object (name) ? name : format (0, "%s", name);
+
+ /* Setup free buffer template. */
+ f->buffer_init_template.free_list_index = f->index;
+
+ if (is_public)
+ {
+ uword *p = hash_get (bm->free_list_by_size, f->n_data_bytes);
+ if (!p)
+ hash_set (bm->free_list_by_size, f->n_data_bytes, f->index);
+ }
+
+ for (i = 1; i < vec_len (vlib_mains); i++)
+ {
+ vlib_buffer_main_t *wbm = vlib_mains[i]->buffer_main;
+ vlib_buffer_free_list_t *wf;
+ pool_get_aligned (wbm->buffer_free_list_pool,
+ wf, CLIB_CACHE_LINE_BYTES);
+ ASSERT (f - bm->buffer_free_list_pool ==
+ wf - wbm->buffer_free_list_pool);
+ wf[0] = f[0];
+ wf->aligned_buffers = 0;
+ wf->unaligned_buffers = 0;
+ wf->n_alloc = 0;
+ }
+#else
if (!is_default && pool_elts (bm->buffer_free_list_pool) == 0)
{
if (!p)
hash_set (bm->free_list_by_size, f->n_data_bytes, f->index);
}
+#endif
return f->index;
}
del_free_list (vlib_main_t * vm, vlib_buffer_free_list_t * f)
{
u32 i;
+#if DPDK > 0
+ struct rte_mbuf *mb;
+ vlib_buffer_t *b;
+
+ for (i = 0; i < vec_len (f->unaligned_buffers); i++)
+ {
+ b = vlib_get_buffer (vm, f->unaligned_buffers[i]);
+ mb = rte_mbuf_from_vlib_buffer (b);
+ ASSERT (rte_mbuf_refcnt_read (mb) == 1);
+ rte_pktmbuf_free (mb);
+ }
+ for (i = 0; i < vec_len (f->aligned_buffers); i++)
+ {
+ b = vlib_get_buffer (vm, f->aligned_buffers[i]);
+ mb = rte_mbuf_from_vlib_buffer (b);
+ ASSERT (rte_mbuf_refcnt_read (mb) == 1);
+ rte_pktmbuf_free (mb);
+ }
+ vec_free (f->name);
+#else
for (i = 0; i < vec_len (f->buffer_memory_allocated); i++)
vm->os_physmem_free (f->buffer_memory_allocated[i]);
vec_free (f->name);
vec_free (f->buffer_memory_allocated);
+#endif
vec_free (f->unaligned_buffers);
vec_free (f->aligned_buffers);
}
vlib_buffer_main_t *bm = vm->buffer_main;
vlib_buffer_free_list_t *f;
u32 merge_index;
+#if DPDK > 0
+ int i;
+
+ ASSERT (os_get_cpu_number () == 0);
+
+ f = vlib_buffer_get_free_list (vm, free_list_index);
+
+ merge_index = vlib_buffer_get_free_list_with_size (vm, f->n_data_bytes);
+ if (merge_index != ~0 && merge_index != free_list_index)
+ {
+ merge_free_lists (pool_elt_at_index (bm->buffer_free_list_pool,
+ merge_index), f);
+ }
+
+ del_free_list (vm, f);
+
+ /* Poison it. */
+ memset (f, 0xab, sizeof (f[0]));
+
+ pool_put (bm->buffer_free_list_pool, f);
+
+ for (i = 1; i < vec_len (vlib_mains); i++)
+ {
+ bm = vlib_mains[i]->buffer_main;
+ f = vlib_buffer_get_free_list (vlib_mains[i], free_list_index);;
+ memset (f, 0xab, sizeof (f[0]));
+ pool_put (bm->buffer_free_list_pool, f);
+ }
+#else
f = vlib_buffer_get_free_list (vm, free_list_index);
memset (f, 0xab, sizeof (f[0]));
pool_put (bm->buffer_free_list_pool, f);
+#endif
}
/* Make sure free list has at least given number of free buffers. */
fill_free_list (vlib_main_t * vm,
vlib_buffer_free_list_t * fl, uword min_free_buffers)
{
+#if DPDK > 0
+ vlib_buffer_t *b;
+ int n, i;
+ u32 bi;
+ u32 n_remaining = 0, n_alloc = 0;
+ unsigned socket_id = rte_socket_id ? rte_socket_id () : 0;
+ struct rte_mempool *rmp = vm->buffer_main->pktmbuf_pools[socket_id];
+ struct rte_mbuf *mb;
+
+ /* Too early? */
+ if (PREDICT_FALSE (rmp == 0))
+ return 0;
+
+ trim_aligned (fl);
+
+ /* Already have enough free buffers on free list? */
+ n = min_free_buffers - vec_len (fl->aligned_buffers);
+ if (n <= 0)
+ return min_free_buffers;
+
+ /* Always allocate round number of buffers. */
+ n = round_pow2 (n, BUFFERS_PER_COPY);
+
+ /* Always allocate new buffers in reasonably large sized chunks. */
+ n = clib_max (n, fl->min_n_buffers_each_physmem_alloc);
+
+ vec_validate (vm->mbuf_alloc_list, n - 1);
+
+ if (rte_mempool_get_bulk (rmp, vm->mbuf_alloc_list, n) < 0)
+ return 0;
+
+ _vec_len (vm->mbuf_alloc_list) = n;
+
+ for (i = 0; i < n; i++)
+ {
+ mb = vm->mbuf_alloc_list[i];
+
+ ASSERT (rte_mbuf_refcnt_read (mb) == 0);
+ rte_mbuf_refcnt_set (mb, 1);
+
+ b = vlib_buffer_from_rte_mbuf (mb);
+ bi = vlib_get_buffer_index (vm, b);
+
+ vec_add1_aligned (fl->aligned_buffers, bi, sizeof (vlib_copy_unit_t));
+ n_alloc++;
+ n_remaining--;
+
+ vlib_buffer_init_for_free_list (b, fl);
+
+ if (fl->buffer_init_function)
+ fl->buffer_init_function (vm, fl, &bi, 1);
+ }
+
+ fl->n_alloc += n;
+
+ return n;
+#else
vlib_buffer_t *buffers, *b;
int n, n_bytes, i;
u32 *bi;
fl->buffer_init_function (vm, fl, bi, n_this_chunk);
}
return n_alloc;
+#endif
}
always_inline uword
uword u_len, n_left;
uword n_unaligned_start, n_unaligned_end, n_filled;
+#if DPDK == 0
ASSERT (os_get_cpu_number () == 0);
+#endif
n_left = n_alloc_buffers;
dst = alloc_buffers;
n_unaligned_start = ((BUFFERS_PER_COPY - copy_alignment (dst))
else
_vec_len (free_list->unaligned_buffers) = u_len;
+#if DPDK == 0
/* Verify that buffers are known free. */
vlib_buffer_validate_alloc_free (vm, alloc_buffers,
n_alloc_buffers, VLIB_BUFFER_KNOWN_FREE);
+#endif
return n_alloc_buffers;
}
vlib_buffer_alloc (vlib_main_t * vm, u32 * buffers, u32 n_buffers)
{
vlib_buffer_main_t *bm = vm->buffer_main;
+#if DPDK == 0
ASSERT (os_get_cpu_number () == 0);
+#endif
return alloc_from_free_list
(vm,
return rv;
}
+#if DPDK == 0
void vnet_buffer_free_dpdk_mb (vlib_buffer_t * b) __attribute__ ((weak));
void
vnet_buffer_free_dpdk_mb (vlib_buffer_t * b)
{
}
+#endif
static_always_inline void
vlib_buffer_free_inline (vlib_main_t * vm,
u32 * buffers, u32 n_buffers, u32 follow_buffer_next)
{
+#if DPDK > 0
+ vlib_buffer_main_t *bm = vm->buffer_main;
+ vlib_buffer_free_list_t *fl;
+ u32 fi;
+ int i;
+ u32 (*cb) (vlib_main_t * vm, u32 * buffers, u32 n_buffers,
+ u32 follow_buffer_next);
+
+ cb = bm->buffer_free_callback;
+
+ if (PREDICT_FALSE (cb != 0))
+ n_buffers = (*cb) (vm, buffers, n_buffers, follow_buffer_next);
+
+ if (!n_buffers)
+ return;
+
+ for (i = 0; i < n_buffers; i++)
+ {
+ vlib_buffer_t *b;
+ struct rte_mbuf *mb;
+
+ b = vlib_get_buffer (vm, buffers[i]);
+
+ fl = buffer_get_free_list (vm, b, &fi);
+
+ /* The only current use of this callback: multicast recycle */
+ if (PREDICT_FALSE (fl->buffers_added_to_freelist_function != 0))
+ {
+ int j;
+
+ add_buffer_to_free_list
+ (vm, fl, buffers[i], (b->flags & VLIB_BUFFER_RECYCLE) == 0);
+
+ for (j = 0; j < vec_len (bm->announce_list); j++)
+ {
+ if (fl == bm->announce_list[j])
+ goto already_announced;
+ }
+ vec_add1 (bm->announce_list, fl);
+ already_announced:
+ ;
+ }
+ else
+ {
+ if (PREDICT_TRUE ((b->flags & VLIB_BUFFER_RECYCLE) == 0))
+ {
+ mb = rte_mbuf_from_vlib_buffer (b);
+ ASSERT (rte_mbuf_refcnt_read (mb) == 1);
+ rte_pktmbuf_free (mb);
+ }
+ }
+ }
+ if (vec_len (bm->announce_list))
+ {
+ vlib_buffer_free_list_t *fl;
+ for (i = 0; i < vec_len (bm->announce_list); i++)
+ {
+ fl = bm->announce_list[i];
+ fl->buffers_added_to_freelist_function (vm, fl);
+ }
+ _vec_len (bm->announce_list) = 0;
+ }
+#else
vlib_buffer_main_t *bm = vm->buffer_main;
vlib_buffer_free_list_t *fl;
static u32 *next_to_free[2]; /* smp bad */
}
_vec_len (announce_list) = 0;
}
+#endif
}
void
0);
}
+#if DPDK == 0
/* Copy template packet data into buffers as they are allocated. */
static void
vlib_packet_template_buffer_init (vlib_main_t * vm,
b->current_length);
}
}
+#endif
void
vlib_packet_template_init (vlib_main_t * vm,
uword min_n_buffers_each_physmem_alloc,
char *fmt, ...)
{
+#if DPDK > 0
+ va_list va;
+ __attribute__ ((unused)) u8 *name;
+
+ va_start (va, fmt);
+ name = va_format (0, fmt, &va);
+ va_end (va);
+
+ vlib_worker_thread_barrier_sync (vm);
+ memset (t, 0, sizeof (t[0]));
+
+ vec_add (t->packet_data, packet_data, n_packet_data_bytes);
+
+ vlib_worker_thread_barrier_release (vm);
+#else
vlib_buffer_free_list_t *fl;
va_list va;
u8 *name;
fl->buffer_init_template.current_data = 0;
fl->buffer_init_template.current_length = n_packet_data_bytes;
fl->buffer_init_template.flags = 0;
+#endif
}
void *
return b->data;
}
+#if DPDK == 0
void
vlib_packet_template_get_packet_helper (vlib_main_t * vm,
vlib_packet_template_t * t)
_vec_len (t->free_buffers) = n_alloc;
}
+#endif
/* Append given data to end of buffer, possibly allocating new buffers. */
u32
vlib_buffer_add_data (vlib_main_t * vm,
return copied;
}
+#if DPDK > 0
+clib_error_t *
+vlib_buffer_pool_create (vlib_main_t * vm, unsigned num_mbufs,
+ unsigned socket_id)
+{
+ vlib_buffer_main_t *bm = vm->buffer_main;
+ vlib_physmem_main_t *vpm = &vm->physmem_main;
+ struct rte_mempool *rmp;
+ int i;
+
+ if (!rte_pktmbuf_pool_create)
+ return clib_error_return (0, "not linked with DPDK");
+
+ vec_validate_aligned (bm->pktmbuf_pools, socket_id, CLIB_CACHE_LINE_BYTES);
+
+ /* pool already exists, nothing to do */
+ if (bm->pktmbuf_pools[socket_id])
+ return 0;
+
+ u8 *pool_name = format (0, "mbuf_pool_socket%u%c", socket_id, 0);
+
+ rmp = rte_pktmbuf_pool_create ((char *) pool_name, /* pool name */
+ num_mbufs, /* number of mbufs */
+ 512, /* cache size */
+ VLIB_BUFFER_HDR_SIZE, /* priv size */
+ VLIB_BUFFER_PRE_DATA_SIZE + VLIB_BUFFER_DATA_SIZE, /* dataroom size */
+ socket_id); /* cpu socket */
+
+ if (rmp)
+ {
+ {
+ uword this_pool_end;
+ uword this_pool_start;
+ uword this_pool_size;
+ uword save_vpm_start, save_vpm_end, save_vpm_size;
+ struct rte_mempool_memhdr *memhdr;
+
+ this_pool_start = ~0ULL;
+ this_pool_end = 0LL;
+
+ STAILQ_FOREACH (memhdr, &rmp->mem_list, next)
+ {
+ if (((uword) (memhdr->addr + memhdr->len)) > this_pool_end)
+ this_pool_end = (uword) (memhdr->addr + memhdr->len);
+ if (((uword) memhdr->addr) < this_pool_start)
+ this_pool_start = (uword) (memhdr->addr);
+ }
+ ASSERT (this_pool_start < ~0ULL && this_pool_end > 0);
+ this_pool_size = this_pool_end - this_pool_start;
+
+ if (CLIB_DEBUG > 1)
+ {
+ clib_warning ("%s: pool start %llx pool end %llx pool size %lld",
+ pool_name, this_pool_start, this_pool_end,
+ this_pool_size);
+ clib_warning
+ ("before: virtual.start %llx virtual.end %llx virtual.size %lld",
+ vpm->virtual.start, vpm->virtual.end, vpm->virtual.size);
+ }
+
+ save_vpm_start = vpm->virtual.start;
+ save_vpm_end = vpm->virtual.end;
+ save_vpm_size = vpm->virtual.size;
+
+ if ((this_pool_start < vpm->virtual.start) || vpm->virtual.start == 0)
+ vpm->virtual.start = this_pool_start;
+ if (this_pool_end > vpm->virtual.end)
+ vpm->virtual.end = this_pool_end;
+
+ vpm->virtual.size = vpm->virtual.end - vpm->virtual.start;
+
+ if (CLIB_DEBUG > 1)
+ {
+ clib_warning
+ ("after: virtual.start %llx virtual.end %llx virtual.size %lld",
+ vpm->virtual.start, vpm->virtual.end, vpm->virtual.size);
+ }
+
+ /* check if fits into buffer index range */
+ if ((u64) vpm->virtual.size >
+ ((u64) 1 << (32 + CLIB_LOG2_CACHE_LINE_BYTES)))
+ {
+ clib_warning ("physmem: virtual size out of range!");
+ vpm->virtual.start = save_vpm_start;
+ vpm->virtual.end = save_vpm_end;
+ vpm->virtual.size = save_vpm_size;
+ rmp = 0;
+ }
+ }
+ if (rmp)
+ {
+ bm->pktmbuf_pools[socket_id] = rmp;
+ vec_free (pool_name);
+ return 0;
+ }
+ }
+
+ vec_free (pool_name);
+
+ /* no usable pool for this socket, try to use pool from another one */
+ for (i = 0; i < vec_len (bm->pktmbuf_pools); i++)
+ {
+ if (bm->pktmbuf_pools[i])
+ {
+ clib_warning
+ ("WARNING: Failed to allocate mempool for CPU socket %u. "
+ "Threads running on socket %u will use socket %u mempool.",
+ socket_id, socket_id, i);
+ bm->pktmbuf_pools[socket_id] = bm->pktmbuf_pools[i];
+ return 0;
+ }
+ }
+
+ return clib_error_return (0, "failed to allocate mempool on socket %u",
+ socket_id);
+}
+#endif
+
static void
vlib_serialize_tx (serialize_main_header_t * m, serialize_stream_t * s)
{
format_vlib_buffer_free_list (u8 * s, va_list * va)
{
vlib_buffer_free_list_t *f = va_arg (*va, vlib_buffer_free_list_t *);
+#if DPDK > 0
+ u32 threadnum = va_arg (*va, u32);
+ uword bytes_alloc, bytes_free, n_free, size;
+
+ if (!f)
+ return format (s, "%=7s%=30s%=12s%=12s%=12s%=12s%=12s%=12s",
+ "Thread", "Name", "Index", "Size", "Alloc", "Free",
+ "#Alloc", "#Free");
+
+ size = sizeof (vlib_buffer_t) + f->n_data_bytes;
+ n_free = vec_len (f->aligned_buffers) + vec_len (f->unaligned_buffers);
+ bytes_alloc = size * f->n_alloc;
+ bytes_free = size * n_free;
+
+ s = format (s, "%7d%30s%12d%12d%=12U%=12U%=12d%=12d", threadnum,
+#else
uword bytes_alloc, bytes_free, n_free, size;
if (!f)
bytes_free = size * n_free;
s = format (s, "%30s%12d%12d%=12U%=12U%=12d%=12d",
+#endif
f->name, f->index, f->n_data_bytes,
format_memory_size, bytes_alloc,
format_memory_size, bytes_free, f->n_alloc, n_free);
show_buffers (vlib_main_t * vm,
unformat_input_t * input, vlib_cli_command_t * cmd)
{
+#if DPDK > 0
+ vlib_buffer_main_t *bm;
+ vlib_buffer_free_list_t *f;
+ vlib_main_t *curr_vm;
+ u32 vm_index = 0;
+
+ vlib_cli_output (vm, "%U", format_vlib_buffer_free_list, 0, 0);
+
+ do
+ {
+ curr_vm = vec_len (vlib_mains) ? vlib_mains[vm_index] : vm;
+ bm = curr_vm->buffer_main;
+
+ /* *INDENT-OFF* */
+ pool_foreach (f, bm->buffer_free_list_pool, ({
+ vlib_cli_output (vm, "%U", format_vlib_buffer_free_list, f, vm_index);
+ }));
+ /* *INDENT-ON* */
+
+ vm_index++;
+ }
+ while (vm_index < vec_len (vlib_mains));
+
+#else
vlib_buffer_main_t *bm = vm->buffer_main;
vlib_buffer_free_list_t *f;
}));
/* *INDENT-ON* */
+#endif
return 0;
}
};
/* *INDENT-ON* */
+#if DPDK > 0
+#if CLIB_DEBUG > 0
+
+u32 *vlib_buffer_state_validation_lock;
+uword *vlib_buffer_state_validation_hash;
+void *vlib_buffer_state_heap;
+
+static clib_error_t *
+buffer_state_validation_init (vlib_main_t * vm)
+{
+ void *oldheap;
+
+ vlib_buffer_state_heap = mheap_alloc (0, 10 << 20);
+
+ oldheap = clib_mem_set_heap (vlib_buffer_state_heap);
+
+ vlib_buffer_state_validation_hash = hash_create (0, sizeof (uword));
+ vec_validate_aligned (vlib_buffer_state_validation_lock, 0,
+ CLIB_CACHE_LINE_BYTES);
+ clib_mem_set_heap (oldheap);
+ return 0;
+}
+
+VLIB_INIT_FUNCTION (buffer_state_validation_init);
+#endif
+#endif
+
+
/** @endcond */
/*
* fd.io coding-style-patch-verification: ON
+++ /dev/null
-/*
- * Copyright (c) 2015 Cisco and/or its affiliates.
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at:
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-/*
- * buffer.c: allocate/free network buffers.
- *
- * Copyright (c) 2008 Eliot Dresselhaus
- *
- * Permission is hereby granted, free of charge, to any person obtaining
- * a copy of this software and associated documentation files (the
- * "Software"), to deal in the Software without restriction, including
- * without limitation the rights to use, copy, modify, merge, publish,
- * distribute, sublicense, and/or sell copies of the Software, and to
- * permit persons to whom the Software is furnished to do so, subject to
- * the following conditions:
- *
- * The above copyright notice and this permission notice shall be
- * included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
- * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
- * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
- * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-
-/**
- * @cond DPDK
- * @file
- *
- * Allocate/free network buffers with DPDK.
- */
-
-#include <rte_config.h>
-
-#include <rte_common.h>
-#include <rte_log.h>
-#include <rte_memory.h>
-#include <rte_memzone.h>
-#include <rte_tailq.h>
-#include <rte_eal.h>
-#include <rte_per_lcore.h>
-#include <rte_launch.h>
-#include <rte_atomic.h>
-#include <rte_cycles.h>
-#include <rte_prefetch.h>
-#include <rte_lcore.h>
-#include <rte_per_lcore.h>
-#include <rte_branch_prediction.h>
-#include <rte_interrupts.h>
-#include <rte_pci.h>
-#include <rte_random.h>
-#include <rte_debug.h>
-#include <rte_ether.h>
-#include <rte_ethdev.h>
-#include <rte_ring.h>
-#include <rte_mempool.h>
-#include <rte_mbuf.h>
-#include <rte_version.h>
-
-#include <vlib/vlib.h>
-
-#pragma weak rte_mem_virt2phy
-#pragma weak rte_eal_has_hugepages
-#pragma weak rte_socket_id
-#pragma weak rte_pktmbuf_pool_create
-
-uword
-vlib_buffer_length_in_chain_slow_path (vlib_main_t * vm,
- vlib_buffer_t * b_first)
-{
- vlib_buffer_t *b = b_first;
- uword l_first = b_first->current_length;
- uword l = 0;
- while (b->flags & VLIB_BUFFER_NEXT_PRESENT)
- {
- b = vlib_get_buffer (vm, b->next_buffer);
- l += b->current_length;
- }
- b_first->total_length_not_including_first_buffer = l;
- b_first->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
- return l + l_first;
-}
-
-u8 *
-format_vlib_buffer (u8 * s, va_list * args)
-{
- vlib_buffer_t *b = va_arg (*args, vlib_buffer_t *);
- uword indent = format_get_indent (s);
-
- s = format (s, "current data %d, length %d, free-list %d",
- b->current_data, b->current_length, b->free_list_index);
-
- if (b->flags & VLIB_BUFFER_TOTAL_LENGTH_VALID)
- s = format (s, ", totlen-nifb %d",
- b->total_length_not_including_first_buffer);
-
- if (b->flags & VLIB_BUFFER_IS_TRACED)
- s = format (s, ", trace 0x%x", b->trace_index);
-
- while (b->flags & VLIB_BUFFER_NEXT_PRESENT)
- {
- vlib_main_t *vm = vlib_get_main ();
- u32 next_buffer = b->next_buffer;
- b = vlib_get_buffer (vm, next_buffer);
-
- s = format (s, "\n%Unext-buffer 0x%x, segment length %d",
- format_white_space, indent, next_buffer, b->current_length);
- }
-
-
- return s;
-}
-
-u8 *
-format_vlib_buffer_and_data (u8 * s, va_list * args)
-{
- vlib_buffer_t *b = va_arg (*args, vlib_buffer_t *);
-
- s = format (s, "%U, %U",
- format_vlib_buffer, b,
- format_hex_bytes, vlib_buffer_get_current (b), 64);
-
- return s;
-}
-
-u8 *
-format_vlib_buffer_contents (u8 * s, va_list * va)
-{
- vlib_main_t *vm = va_arg (*va, vlib_main_t *);
- vlib_buffer_t *b = va_arg (*va, vlib_buffer_t *);
-
- while (1)
- {
- vec_add (s, vlib_buffer_get_current (b), b->current_length);
- if (!(b->flags & VLIB_BUFFER_NEXT_PRESENT))
- break;
- b = vlib_get_buffer (vm, b->next_buffer);
- }
-
- return s;
-}
-
-vlib_main_t **vlib_mains;
-
-/* Aligned copy routine. */
-void
-vlib_aligned_memcpy (void *_dst, void *_src, int n_bytes)
-{
- vlib_copy_unit_t *dst = _dst;
- vlib_copy_unit_t *src = _src;
-
- /* Arguments must be naturally aligned. */
- ASSERT (pointer_to_uword (dst) % sizeof (dst[0]) == 0);
- ASSERT (pointer_to_uword (src) % sizeof (src[0]) == 0);
- ASSERT (n_bytes % sizeof (dst[0]) == 0);
-
- if (4 * sizeof (dst[0]) == CLIB_CACHE_LINE_BYTES)
- {
- CLIB_PREFETCH (dst + 0, 4 * sizeof (dst[0]), WRITE);
- CLIB_PREFETCH (src + 0, 4 * sizeof (src[0]), READ);
-
- while (n_bytes >= 4 * sizeof (dst[0]))
- {
- dst += 4;
- src += 4;
- n_bytes -= 4 * sizeof (dst[0]);
- CLIB_PREFETCH (dst, 4 * sizeof (dst[0]), WRITE);
- CLIB_PREFETCH (src, 4 * sizeof (src[0]), READ);
- dst[-4] = src[-4];
- dst[-3] = src[-3];
- dst[-2] = src[-2];
- dst[-1] = src[-1];
- }
- }
- else if (8 * sizeof (dst[0]) == CLIB_CACHE_LINE_BYTES)
- {
- CLIB_PREFETCH (dst + 0, 8 * sizeof (dst[0]), WRITE);
- CLIB_PREFETCH (src + 0, 8 * sizeof (src[0]), READ);
-
- while (n_bytes >= 8 * sizeof (dst[0]))
- {
- dst += 8;
- src += 8;
- n_bytes -= 8 * sizeof (dst[0]);
- CLIB_PREFETCH (dst, 8 * sizeof (dst[0]), WRITE);
- CLIB_PREFETCH (src, 8 * sizeof (src[0]), READ);
- dst[-8] = src[-8];
- dst[-7] = src[-7];
- dst[-6] = src[-6];
- dst[-5] = src[-5];
- dst[-4] = src[-4];
- dst[-3] = src[-3];
- dst[-2] = src[-2];
- dst[-1] = src[-1];
- }
- }
- else
- /* Cache line size unknown: fall back to slow version. */ ;
-
- while (n_bytes > 0)
- {
- *dst++ = *src++;
- n_bytes -= 1 * sizeof (dst[0]);
- }
-}
-
-#define BUFFERS_PER_COPY (sizeof (vlib_copy_unit_t) / sizeof (u32))
-
-/* Make sure we have at least given number of unaligned buffers. */
-static void
-fill_unaligned (vlib_main_t * vm,
- vlib_buffer_free_list_t * free_list,
- uword n_unaligned_buffers)
-{
- word la = vec_len (free_list->aligned_buffers);
- word lu = vec_len (free_list->unaligned_buffers);
-
- /* Aligned come in aligned copy-sized chunks. */
- ASSERT (la % BUFFERS_PER_COPY == 0);
-
- ASSERT (la >= n_unaligned_buffers);
-
- while (lu < n_unaligned_buffers)
- {
- /* Copy 4 buffers from end of aligned vector to unaligned vector. */
- vec_add (free_list->unaligned_buffers,
- free_list->aligned_buffers + la - BUFFERS_PER_COPY,
- BUFFERS_PER_COPY);
- la -= BUFFERS_PER_COPY;
- lu += BUFFERS_PER_COPY;
- }
- _vec_len (free_list->aligned_buffers) = la;
-}
-
-/* After free aligned buffers may not contain even sized chunks. */
-static void
-trim_aligned (vlib_buffer_free_list_t * f)
-{
- uword l, n_trim;
-
- /* Add unaligned to aligned before trim. */
- l = vec_len (f->unaligned_buffers);
- if (l > 0)
- {
- vec_add_aligned (f->aligned_buffers, f->unaligned_buffers, l,
- /* align */ sizeof (vlib_copy_unit_t));
-
- _vec_len (f->unaligned_buffers) = 0;
- }
-
- /* Remove unaligned buffers from end of aligned vector and save for next trim. */
- l = vec_len (f->aligned_buffers);
- n_trim = l % BUFFERS_PER_COPY;
- if (n_trim)
- {
- /* Trim aligned -> unaligned. */
- vec_add (f->unaligned_buffers, f->aligned_buffers + l - n_trim, n_trim);
-
- /* Remove from aligned. */
- _vec_len (f->aligned_buffers) = l - n_trim;
- }
-}
-
-static void
-merge_free_lists (vlib_buffer_free_list_t * dst,
- vlib_buffer_free_list_t * src)
-{
- uword l;
- u32 *d;
-
- trim_aligned (src);
- trim_aligned (dst);
-
- l = vec_len (src->aligned_buffers);
- if (l > 0)
- {
- vec_add2_aligned (dst->aligned_buffers, d, l,
- /* align */ sizeof (vlib_copy_unit_t));
- vlib_aligned_memcpy (d, src->aligned_buffers, l * sizeof (d[0]));
- vec_free (src->aligned_buffers);
- }
-
- l = vec_len (src->unaligned_buffers);
- if (l > 0)
- {
- vec_add (dst->unaligned_buffers, src->unaligned_buffers, l);
- vec_free (src->unaligned_buffers);
- }
-}
-
-always_inline u32
-vlib_buffer_get_free_list_with_size (vlib_main_t * vm, u32 size)
-{
- vlib_buffer_main_t *bm = vm->buffer_main;
-
- size = vlib_buffer_round_size (size);
- uword *p = hash_get (bm->free_list_by_size, size);
- return p ? p[0] : ~0;
-}
-
-/* Add buffer free list. */
-static u32
-vlib_buffer_create_free_list_helper (vlib_main_t * vm,
- u32 n_data_bytes,
- u32 is_public, u32 is_default, u8 * name)
-{
- vlib_buffer_main_t *bm = vm->buffer_main;
- vlib_buffer_free_list_t *f;
- int i;
-
- ASSERT (os_get_cpu_number () == 0);
-
- if (!is_default && pool_elts (bm->buffer_free_list_pool) == 0)
- {
- u32 default_free_free_list_index;
-
- /* *INDENT-OFF* */
- default_free_free_list_index =
- vlib_buffer_create_free_list_helper
- (vm,
- /* default buffer size */ VLIB_BUFFER_DEFAULT_FREE_LIST_BYTES,
- /* is_public */ 1,
- /* is_default */ 1,
- (u8 *) "default");
- /* *INDENT-ON* */
- ASSERT (default_free_free_list_index ==
- VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
-
- if (n_data_bytes == VLIB_BUFFER_DEFAULT_FREE_LIST_BYTES && is_public)
- return default_free_free_list_index;
- }
-
- pool_get_aligned (bm->buffer_free_list_pool, f, CLIB_CACHE_LINE_BYTES);
-
- memset (f, 0, sizeof (f[0]));
- f->index = f - bm->buffer_free_list_pool;
- f->n_data_bytes = vlib_buffer_round_size (n_data_bytes);
- f->min_n_buffers_each_physmem_alloc = 16;
- f->name = clib_mem_is_heap_object (name) ? name : format (0, "%s", name);
-
- /* Setup free buffer template. */
- f->buffer_init_template.free_list_index = f->index;
-
- if (is_public)
- {
- uword *p = hash_get (bm->free_list_by_size, f->n_data_bytes);
- if (!p)
- hash_set (bm->free_list_by_size, f->n_data_bytes, f->index);
- }
-
- for (i = 1; i < vec_len (vlib_mains); i++)
- {
- vlib_buffer_main_t *wbm = vlib_mains[i]->buffer_main;
- vlib_buffer_free_list_t *wf;
- pool_get_aligned (wbm->buffer_free_list_pool,
- wf, CLIB_CACHE_LINE_BYTES);
- ASSERT (f - bm->buffer_free_list_pool ==
- wf - wbm->buffer_free_list_pool);
- wf[0] = f[0];
- wf->aligned_buffers = 0;
- wf->unaligned_buffers = 0;
- wf->n_alloc = 0;
- }
-
- return f->index;
-}
-
-u32
-vlib_buffer_create_free_list (vlib_main_t * vm, u32 n_data_bytes,
- char *fmt, ...)
-{
- va_list va;
- u8 *name;
-
- va_start (va, fmt);
- name = va_format (0, fmt, &va);
- va_end (va);
-
- return vlib_buffer_create_free_list_helper (vm, n_data_bytes,
- /* is_public */ 0,
- /* is_default */ 0,
- name);
-}
-
-u32
-vlib_buffer_get_or_create_free_list (vlib_main_t * vm, u32 n_data_bytes,
- char *fmt, ...)
-{
- u32 i = vlib_buffer_get_free_list_with_size (vm, n_data_bytes);
-
- if (i == ~0)
- {
- va_list va;
- u8 *name;
-
- va_start (va, fmt);
- name = va_format (0, fmt, &va);
- va_end (va);
-
- i = vlib_buffer_create_free_list_helper (vm, n_data_bytes,
- /* is_public */ 1,
- /* is_default */ 0,
- name);
- }
-
- return i;
-}
-
-static void
-del_free_list (vlib_main_t * vm, vlib_buffer_free_list_t * f)
-{
- u32 i;
- struct rte_mbuf *mb;
- vlib_buffer_t *b;
-
- for (i = 0; i < vec_len (f->unaligned_buffers); i++)
- {
- b = vlib_get_buffer (vm, f->unaligned_buffers[i]);
- mb = rte_mbuf_from_vlib_buffer (b);
- ASSERT (rte_mbuf_refcnt_read (mb) == 1);
- rte_pktmbuf_free (mb);
- }
- for (i = 0; i < vec_len (f->aligned_buffers); i++)
- {
- b = vlib_get_buffer (vm, f->aligned_buffers[i]);
- mb = rte_mbuf_from_vlib_buffer (b);
- ASSERT (rte_mbuf_refcnt_read (mb) == 1);
- rte_pktmbuf_free (mb);
- }
- vec_free (f->name);
- vec_free (f->unaligned_buffers);
- vec_free (f->aligned_buffers);
-}
-
-/* Add buffer free list. */
-void
-vlib_buffer_delete_free_list (vlib_main_t * vm, u32 free_list_index)
-{
- vlib_buffer_main_t *bm = vm->buffer_main;
- vlib_buffer_free_list_t *f;
- u32 merge_index;
- int i;
-
- ASSERT (os_get_cpu_number () == 0);
-
- f = vlib_buffer_get_free_list (vm, free_list_index);
-
- merge_index = vlib_buffer_get_free_list_with_size (vm, f->n_data_bytes);
- if (merge_index != ~0 && merge_index != free_list_index)
- {
- merge_free_lists (pool_elt_at_index (bm->buffer_free_list_pool,
- merge_index), f);
- }
-
- del_free_list (vm, f);
-
- /* Poison it. */
- memset (f, 0xab, sizeof (f[0]));
-
- pool_put (bm->buffer_free_list_pool, f);
-
- for (i = 1; i < vec_len (vlib_mains); i++)
- {
- bm = vlib_mains[i]->buffer_main;
- f = vlib_buffer_get_free_list (vlib_mains[i], free_list_index);;
- memset (f, 0xab, sizeof (f[0]));
- pool_put (bm->buffer_free_list_pool, f);
- }
-
-}
-
-/* Make sure free list has at least given number of free buffers. */
-static uword
-fill_free_list (vlib_main_t * vm,
- vlib_buffer_free_list_t * fl, uword min_free_buffers)
-{
- vlib_buffer_t *b;
- int n, i;
- u32 bi;
- u32 n_remaining = 0, n_alloc = 0;
- unsigned socket_id = rte_socket_id ? rte_socket_id () : 0;
- struct rte_mempool *rmp = vm->buffer_main->pktmbuf_pools[socket_id];
- struct rte_mbuf *mb;
-
- /* Too early? */
- if (PREDICT_FALSE (rmp == 0))
- return 0;
-
- trim_aligned (fl);
-
- /* Already have enough free buffers on free list? */
- n = min_free_buffers - vec_len (fl->aligned_buffers);
- if (n <= 0)
- return min_free_buffers;
-
- /* Always allocate round number of buffers. */
- n = round_pow2 (n, BUFFERS_PER_COPY);
-
- /* Always allocate new buffers in reasonably large sized chunks. */
- n = clib_max (n, fl->min_n_buffers_each_physmem_alloc);
-
- vec_validate (vm->mbuf_alloc_list, n - 1);
-
- if (rte_mempool_get_bulk (rmp, vm->mbuf_alloc_list, n) < 0)
- return 0;
-
- _vec_len (vm->mbuf_alloc_list) = n;
-
- for (i = 0; i < n; i++)
- {
- mb = vm->mbuf_alloc_list[i];
-
- ASSERT (rte_mbuf_refcnt_read (mb) == 0);
- rte_mbuf_refcnt_set (mb, 1);
-
- b = vlib_buffer_from_rte_mbuf (mb);
- bi = vlib_get_buffer_index (vm, b);
-
- vec_add1_aligned (fl->aligned_buffers, bi, sizeof (vlib_copy_unit_t));
- n_alloc++;
- n_remaining--;
-
- vlib_buffer_init_for_free_list (b, fl);
-
- if (fl->buffer_init_function)
- fl->buffer_init_function (vm, fl, &bi, 1);
- }
-
- fl->n_alloc += n;
-
- return n;
-}
-
-always_inline uword
-copy_alignment (u32 * x)
-{
- return (pointer_to_uword (x) / sizeof (x[0])) % BUFFERS_PER_COPY;
-}
-
-static u32
-alloc_from_free_list (vlib_main_t * vm,
- vlib_buffer_free_list_t * free_list,
- u32 * alloc_buffers, u32 n_alloc_buffers)
-{
- u32 *dst, *u_src;
- uword u_len, n_left;
- uword n_unaligned_start, n_unaligned_end, n_filled;
-
- n_left = n_alloc_buffers;
- dst = alloc_buffers;
- n_unaligned_start = ((BUFFERS_PER_COPY - copy_alignment (dst))
- & (BUFFERS_PER_COPY - 1));
-
- n_filled = fill_free_list (vm, free_list, n_alloc_buffers);
- if (n_filled == 0)
- return 0;
-
- n_left = n_filled < n_left ? n_filled : n_left;
- n_alloc_buffers = n_left;
-
- if (n_unaligned_start >= n_left)
- {
- n_unaligned_start = n_left;
- n_unaligned_end = 0;
- }
- else
- n_unaligned_end = copy_alignment (dst + n_alloc_buffers);
-
- fill_unaligned (vm, free_list, n_unaligned_start + n_unaligned_end);
-
- u_len = vec_len (free_list->unaligned_buffers);
- u_src = free_list->unaligned_buffers + u_len - 1;
-
- if (n_unaligned_start)
- {
- uword n_copy = n_unaligned_start;
- if (n_copy > n_left)
- n_copy = n_left;
- n_left -= n_copy;
-
- while (n_copy > 0)
- {
- *dst++ = *u_src--;
- n_copy--;
- u_len--;
- }
-
- /* Now dst should be aligned. */
- if (n_left > 0)
- ASSERT (pointer_to_uword (dst) % sizeof (vlib_copy_unit_t) == 0);
- }
-
- /* Aligned copy. */
- {
- vlib_copy_unit_t *d, *s;
- uword n_copy;
-
- if (vec_len (free_list->aligned_buffers) <
- ((n_left / BUFFERS_PER_COPY) * BUFFERS_PER_COPY))
- abort ();
-
- n_copy = n_left / BUFFERS_PER_COPY;
- n_left = n_left % BUFFERS_PER_COPY;
-
- /* Remove buffers from aligned free list. */
- _vec_len (free_list->aligned_buffers) -= n_copy * BUFFERS_PER_COPY;
-
- s = (vlib_copy_unit_t *) vec_end (free_list->aligned_buffers);
- d = (vlib_copy_unit_t *) dst;
-
- /* Fast path loop. */
- while (n_copy >= 4)
- {
- d[0] = s[0];
- d[1] = s[1];
- d[2] = s[2];
- d[3] = s[3];
- n_copy -= 4;
- s += 4;
- d += 4;
- }
-
- while (n_copy >= 1)
- {
- d[0] = s[0];
- n_copy -= 1;
- s += 1;
- d += 1;
- }
-
- dst = (void *) d;
- }
-
- /* Unaligned copy. */
- ASSERT (n_unaligned_end == n_left);
- while (n_left > 0)
- {
- *dst++ = *u_src--;
- n_left--;
- u_len--;
- }
-
- if (!free_list->unaligned_buffers)
- ASSERT (u_len == 0);
- else
- _vec_len (free_list->unaligned_buffers) = u_len;
-
- return n_alloc_buffers;
-}
-
-/* Allocate a given number of buffers into given array.
- Returns number actually allocated which will be either zero or
- number requested. */
-u32
-vlib_buffer_alloc (vlib_main_t * vm, u32 * buffers, u32 n_buffers)
-{
- vlib_buffer_main_t *bm = vm->buffer_main;
-
- return alloc_from_free_list
- (vm,
- pool_elt_at_index (bm->buffer_free_list_pool,
- VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX),
- buffers, n_buffers);
-}
-
-u32
-vlib_buffer_alloc_from_free_list (vlib_main_t * vm,
- u32 * buffers,
- u32 n_buffers, u32 free_list_index)
-{
- vlib_buffer_main_t *bm = vm->buffer_main;
- vlib_buffer_free_list_t *f;
- f = pool_elt_at_index (bm->buffer_free_list_pool, free_list_index);
- return alloc_from_free_list (vm, f, buffers, n_buffers);
-}
-
-always_inline void
-add_buffer_to_free_list (vlib_main_t * vm,
- vlib_buffer_free_list_t * f,
- u32 buffer_index, u8 do_init)
-{
- vlib_buffer_t *b;
- b = vlib_get_buffer (vm, buffer_index);
- if (PREDICT_TRUE (do_init))
- vlib_buffer_init_for_free_list (b, f);
- vec_add1_aligned (f->aligned_buffers, buffer_index,
- sizeof (vlib_copy_unit_t));
-}
-
-always_inline vlib_buffer_free_list_t *
-buffer_get_free_list (vlib_main_t * vm, vlib_buffer_t * b, u32 * index)
-{
- vlib_buffer_main_t *bm = vm->buffer_main;
- u32 i;
-
- *index = i = b->free_list_index;
- return pool_elt_at_index (bm->buffer_free_list_pool, i);
-}
-
-void *
-vlib_set_buffer_free_callback (vlib_main_t * vm, void *fp)
-{
- vlib_buffer_main_t *bm = vm->buffer_main;
- void *rv = bm->buffer_free_callback;
-
- bm->buffer_free_callback = fp;
- return rv;
-}
-
-static_always_inline void
-vlib_buffer_free_inline (vlib_main_t * vm,
- u32 * buffers, u32 n_buffers, u32 follow_buffer_next)
-{
- vlib_buffer_main_t *bm = vm->buffer_main;
- vlib_buffer_free_list_t *fl;
- u32 fi;
- int i;
- u32 (*cb) (vlib_main_t * vm, u32 * buffers, u32 n_buffers,
- u32 follow_buffer_next);
-
- cb = bm->buffer_free_callback;
-
- if (PREDICT_FALSE (cb != 0))
- n_buffers = (*cb) (vm, buffers, n_buffers, follow_buffer_next);
-
- if (!n_buffers)
- return;
-
- for (i = 0; i < n_buffers; i++)
- {
- vlib_buffer_t *b;
- struct rte_mbuf *mb;
-
- b = vlib_get_buffer (vm, buffers[i]);
-
- fl = buffer_get_free_list (vm, b, &fi);
-
- /* The only current use of this callback: multicast recycle */
- if (PREDICT_FALSE (fl->buffers_added_to_freelist_function != 0))
- {
- int j;
-
- add_buffer_to_free_list
- (vm, fl, buffers[i], (b->flags & VLIB_BUFFER_RECYCLE) == 0);
-
- for (j = 0; j < vec_len (bm->announce_list); j++)
- {
- if (fl == bm->announce_list[j])
- goto already_announced;
- }
- vec_add1 (bm->announce_list, fl);
- already_announced:
- ;
- }
- else
- {
- if (PREDICT_TRUE ((b->flags & VLIB_BUFFER_RECYCLE) == 0))
- {
- mb = rte_mbuf_from_vlib_buffer (b);
- ASSERT (rte_mbuf_refcnt_read (mb) == 1);
- rte_pktmbuf_free (mb);
- }
- }
- }
- if (vec_len (bm->announce_list))
- {
- vlib_buffer_free_list_t *fl;
- for (i = 0; i < vec_len (bm->announce_list); i++)
- {
- fl = bm->announce_list[i];
- fl->buffers_added_to_freelist_function (vm, fl);
- }
- _vec_len (bm->announce_list) = 0;
- }
-}
-
-void
-vlib_buffer_free (vlib_main_t * vm, u32 * buffers, u32 n_buffers)
-{
- vlib_buffer_free_inline (vm, buffers, n_buffers, /* follow_buffer_next */
- 1);
-}
-
-void
-vlib_buffer_free_no_next (vlib_main_t * vm, u32 * buffers, u32 n_buffers)
-{
- vlib_buffer_free_inline (vm, buffers, n_buffers, /* follow_buffer_next */
- 0);
-}
-
-/* Copy template packet data into buffers as they are allocated. */
-__attribute__ ((unused))
- static void
- vlib_packet_template_buffer_init (vlib_main_t * vm,
- vlib_buffer_free_list_t * fl,
- u32 * buffers, u32 n_buffers)
-{
- vlib_packet_template_t *t =
- uword_to_pointer (fl->buffer_init_function_opaque,
- vlib_packet_template_t *);
- uword i;
-
- for (i = 0; i < n_buffers; i++)
- {
- vlib_buffer_t *b = vlib_get_buffer (vm, buffers[i]);
- ASSERT (b->current_length == vec_len (t->packet_data));
- clib_memcpy (vlib_buffer_get_current (b), t->packet_data,
- b->current_length);
- }
-}
-
-void
-vlib_packet_template_init (vlib_main_t * vm,
- vlib_packet_template_t * t,
- void *packet_data,
- uword n_packet_data_bytes,
- uword min_n_buffers_each_physmem_alloc,
- char *fmt, ...)
-{
- va_list va;
- __attribute__ ((unused)) u8 *name;
-
- va_start (va, fmt);
- name = va_format (0, fmt, &va);
- va_end (va);
-
- vlib_worker_thread_barrier_sync (vm);
- memset (t, 0, sizeof (t[0]));
-
- vec_add (t->packet_data, packet_data, n_packet_data_bytes);
-
- vlib_worker_thread_barrier_release (vm);
-}
-
-void *
-vlib_packet_template_get_packet (vlib_main_t * vm,
- vlib_packet_template_t * t, u32 * bi_result)
-{
- u32 bi;
- vlib_buffer_t *b;
-
- if (vlib_buffer_alloc (vm, &bi, 1) != 1)
- return 0;
-
- *bi_result = bi;
-
- b = vlib_get_buffer (vm, bi);
- clib_memcpy (vlib_buffer_get_current (b),
- t->packet_data, vec_len (t->packet_data));
- b->current_length = vec_len (t->packet_data);
-
- return b->data;
-}
-
-/* Append given data to end of buffer, possibly allocating new buffers. */
-u32
-vlib_buffer_add_data (vlib_main_t * vm,
- u32 free_list_index,
- u32 buffer_index, void *data, u32 n_data_bytes)
-{
- u32 n_buffer_bytes, n_left, n_left_this_buffer, bi;
- vlib_buffer_t *b;
- void *d;
-
- bi = buffer_index;
- if (bi == 0
- && 1 != vlib_buffer_alloc_from_free_list (vm, &bi, 1, free_list_index))
- goto out_of_buffers;
-
- d = data;
- n_left = n_data_bytes;
- n_buffer_bytes = vlib_buffer_free_list_buffer_size (vm, free_list_index);
-
- b = vlib_get_buffer (vm, bi);
- b->flags &= ~VLIB_BUFFER_TOTAL_LENGTH_VALID;
-
- /* Get to the end of the chain before we try to append data... */
- while (b->flags & VLIB_BUFFER_NEXT_PRESENT)
- b = vlib_get_buffer (vm, b->next_buffer);
-
- while (1)
- {
- u32 n;
-
- ASSERT (n_buffer_bytes >= b->current_length);
- n_left_this_buffer =
- n_buffer_bytes - (b->current_data + b->current_length);
- n = clib_min (n_left_this_buffer, n_left);
- clib_memcpy (vlib_buffer_get_current (b) + b->current_length, d, n);
- b->current_length += n;
- n_left -= n;
- if (n_left == 0)
- break;
-
- d += n;
- if (1 !=
- vlib_buffer_alloc_from_free_list (vm, &b->next_buffer, 1,
- free_list_index))
- goto out_of_buffers;
-
- b->flags |= VLIB_BUFFER_NEXT_PRESENT;
-
- b = vlib_get_buffer (vm, b->next_buffer);
- }
-
- return bi;
-
-out_of_buffers:
- clib_error ("out of buffers");
- return bi;
-}
-
-u16
-vlib_buffer_chain_append_data_with_alloc (vlib_main_t * vm,
- u32 free_list_index,
- vlib_buffer_t * first,
- vlib_buffer_t ** last,
- void *data, u16 data_len)
-{
- vlib_buffer_t *l = *last;
- u32 n_buffer_bytes =
- vlib_buffer_free_list_buffer_size (vm, free_list_index);
- u16 copied = 0;
- ASSERT (n_buffer_bytes >= l->current_length + l->current_data);
- while (data_len)
- {
- u16 max = n_buffer_bytes - l->current_length - l->current_data;
- if (max == 0)
- {
- if (1 !=
- vlib_buffer_alloc_from_free_list (vm, &l->next_buffer, 1,
- free_list_index))
- return copied;
- *last = l = vlib_buffer_chain_buffer (vm, first, l, l->next_buffer);
- max = n_buffer_bytes - l->current_length - l->current_data;
- }
-
- u16 len = (data_len > max) ? max : data_len;
- clib_memcpy (vlib_buffer_get_current (l) + l->current_length,
- data + copied, len);
- vlib_buffer_chain_increase_length (first, l, len);
- data_len -= len;
- copied += len;
- }
- return copied;
-}
-
-clib_error_t *
-vlib_buffer_pool_create (vlib_main_t * vm, unsigned num_mbufs,
- unsigned socket_id)
-{
- vlib_buffer_main_t *bm = vm->buffer_main;
- vlib_physmem_main_t *vpm = &vm->physmem_main;
- struct rte_mempool *rmp;
- int i;
-
- if (!rte_pktmbuf_pool_create)
- return clib_error_return (0, "not linked with DPDK");
-
- vec_validate_aligned (bm->pktmbuf_pools, socket_id, CLIB_CACHE_LINE_BYTES);
-
- /* pool already exists, nothing to do */
- if (bm->pktmbuf_pools[socket_id])
- return 0;
-
- u8 *pool_name = format (0, "mbuf_pool_socket%u%c", socket_id, 0);
-
- rmp = rte_pktmbuf_pool_create ((char *) pool_name, /* pool name */
- num_mbufs, /* number of mbufs */
- 512, /* cache size */
- VLIB_BUFFER_HDR_SIZE, /* priv size */
- VLIB_BUFFER_PRE_DATA_SIZE + VLIB_BUFFER_DATA_SIZE, /* dataroom size */
- socket_id); /* cpu socket */
-
- if (rmp)
- {
- {
- uword this_pool_end;
- uword this_pool_start;
- uword this_pool_size;
- uword save_vpm_start, save_vpm_end, save_vpm_size;
- struct rte_mempool_memhdr *memhdr;
-
- this_pool_start = ~0ULL;
- this_pool_end = 0LL;
-
- STAILQ_FOREACH (memhdr, &rmp->mem_list, next)
- {
- if (((uword) (memhdr->addr + memhdr->len)) > this_pool_end)
- this_pool_end = (uword) (memhdr->addr + memhdr->len);
- if (((uword) memhdr->addr) < this_pool_start)
- this_pool_start = (uword) (memhdr->addr);
- }
- ASSERT (this_pool_start < ~0ULL && this_pool_end > 0);
- this_pool_size = this_pool_end - this_pool_start;
-
- if (CLIB_DEBUG > 1)
- {
- clib_warning ("%s: pool start %llx pool end %llx pool size %lld",
- pool_name, this_pool_start, this_pool_end,
- this_pool_size);
- clib_warning
- ("before: virtual.start %llx virtual.end %llx virtual.size %lld",
- vpm->virtual.start, vpm->virtual.end, vpm->virtual.size);
- }
-
- save_vpm_start = vpm->virtual.start;
- save_vpm_end = vpm->virtual.end;
- save_vpm_size = vpm->virtual.size;
-
- if ((this_pool_start < vpm->virtual.start) || vpm->virtual.start == 0)
- vpm->virtual.start = this_pool_start;
- if (this_pool_end > vpm->virtual.end)
- vpm->virtual.end = this_pool_end;
-
- vpm->virtual.size = vpm->virtual.end - vpm->virtual.start;
-
- if (CLIB_DEBUG > 1)
- {
- clib_warning
- ("after: virtual.start %llx virtual.end %llx virtual.size %lld",
- vpm->virtual.start, vpm->virtual.end, vpm->virtual.size);
- }
-
- /* check if fits into buffer index range */
- if ((u64) vpm->virtual.size >
- ((u64) 1 << (32 + CLIB_LOG2_CACHE_LINE_BYTES)))
- {
- clib_warning ("physmem: virtual size out of range!");
- vpm->virtual.start = save_vpm_start;
- vpm->virtual.end = save_vpm_end;
- vpm->virtual.size = save_vpm_size;
- rmp = 0;
- }
- }
- if (rmp)
- {
- bm->pktmbuf_pools[socket_id] = rmp;
- vec_free (pool_name);
- return 0;
- }
- }
-
- vec_free (pool_name);
-
- /* no usable pool for this socket, try to use pool from another one */
- for (i = 0; i < vec_len (bm->pktmbuf_pools); i++)
- {
- if (bm->pktmbuf_pools[i])
- {
- clib_warning
- ("WARNING: Failed to allocate mempool for CPU socket %u. "
- "Threads running on socket %u will use socket %u mempool.",
- socket_id, socket_id, i);
- bm->pktmbuf_pools[socket_id] = bm->pktmbuf_pools[i];
- return 0;
- }
- }
-
- return clib_error_return (0, "failed to allocate mempool on socket %u",
- socket_id);
-}
-
-
-static void
-vlib_serialize_tx (serialize_main_header_t * m, serialize_stream_t * s)
-{
- vlib_main_t *vm;
- vlib_serialize_buffer_main_t *sm;
- uword n, n_bytes_to_write;
- vlib_buffer_t *last;
-
- n_bytes_to_write = s->current_buffer_index;
- sm =
- uword_to_pointer (s->data_function_opaque,
- vlib_serialize_buffer_main_t *);
- vm = sm->vlib_main;
-
- ASSERT (sm->tx.max_n_data_bytes_per_chain > 0);
- if (serialize_stream_is_end_of_stream (s)
- || sm->tx.n_total_data_bytes + n_bytes_to_write >
- sm->tx.max_n_data_bytes_per_chain)
- {
- vlib_process_t *p = vlib_get_current_process (vm);
-
- last = vlib_get_buffer (vm, sm->last_buffer);
- last->current_length = n_bytes_to_write;
-
- vlib_set_next_frame_buffer (vm, &p->node_runtime, sm->tx.next_index,
- sm->first_buffer);
-
- sm->first_buffer = sm->last_buffer = ~0;
- sm->tx.n_total_data_bytes = 0;
- }
-
- else if (n_bytes_to_write == 0 && s->n_buffer_bytes == 0)
- {
- ASSERT (sm->first_buffer == ~0);
- ASSERT (sm->last_buffer == ~0);
- n =
- vlib_buffer_alloc_from_free_list (vm, &sm->first_buffer, 1,
- sm->tx.free_list_index);
- if (n != 1)
- serialize_error (m,
- clib_error_create
- ("vlib_buffer_alloc_from_free_list fails"));
- sm->last_buffer = sm->first_buffer;
- s->n_buffer_bytes =
- vlib_buffer_free_list_buffer_size (vm, sm->tx.free_list_index);
- }
-
- if (n_bytes_to_write > 0)
- {
- vlib_buffer_t *prev = vlib_get_buffer (vm, sm->last_buffer);
- n =
- vlib_buffer_alloc_from_free_list (vm, &sm->last_buffer, 1,
- sm->tx.free_list_index);
- if (n != 1)
- serialize_error (m,
- clib_error_create
- ("vlib_buffer_alloc_from_free_list fails"));
- sm->tx.n_total_data_bytes += n_bytes_to_write;
- prev->current_length = n_bytes_to_write;
- prev->next_buffer = sm->last_buffer;
- prev->flags |= VLIB_BUFFER_NEXT_PRESENT;
- }
-
- if (sm->last_buffer != ~0)
- {
- last = vlib_get_buffer (vm, sm->last_buffer);
- s->buffer = vlib_buffer_get_current (last);
- s->current_buffer_index = 0;
- ASSERT (last->current_data == s->current_buffer_index);
- }
-}
-
-static void
-vlib_serialize_rx (serialize_main_header_t * m, serialize_stream_t * s)
-{
- vlib_main_t *vm;
- vlib_serialize_buffer_main_t *sm;
- vlib_buffer_t *last;
-
- sm =
- uword_to_pointer (s->data_function_opaque,
- vlib_serialize_buffer_main_t *);
- vm = sm->vlib_main;
-
- if (serialize_stream_is_end_of_stream (s))
- return;
-
- if (sm->last_buffer != ~0)
- {
- last = vlib_get_buffer (vm, sm->last_buffer);
-
- if (last->flags & VLIB_BUFFER_NEXT_PRESENT)
- sm->last_buffer = last->next_buffer;
- else
- {
- vlib_buffer_free (vm, &sm->first_buffer, /* count */ 1);
- sm->first_buffer = sm->last_buffer = ~0;
- }
- }
-
- if (sm->last_buffer == ~0)
- {
- while (clib_fifo_elts (sm->rx.buffer_fifo) == 0)
- {
- sm->rx.ready_one_time_event =
- vlib_process_create_one_time_event (vm, vlib_current_process (vm),
- ~0);
- vlib_process_wait_for_one_time_event (vm, /* no event data */ 0,
- sm->rx.ready_one_time_event);
- }
-
- clib_fifo_sub1 (sm->rx.buffer_fifo, sm->first_buffer);
- sm->last_buffer = sm->first_buffer;
- }
-
- ASSERT (sm->last_buffer != ~0);
-
- last = vlib_get_buffer (vm, sm->last_buffer);
- s->current_buffer_index = 0;
- s->buffer = vlib_buffer_get_current (last);
- s->n_buffer_bytes = last->current_length;
-}
-
-static void
-serialize_open_vlib_helper (serialize_main_t * m,
- vlib_main_t * vm,
- vlib_serialize_buffer_main_t * sm, uword is_read)
-{
- /* Initialize serialize main but save overflow buffer for re-use between calls. */
- {
- u8 *save = m->stream.overflow_buffer;
- memset (m, 0, sizeof (m[0]));
- m->stream.overflow_buffer = save;
- if (save)
- _vec_len (save) = 0;
- }
-
- sm->first_buffer = sm->last_buffer = ~0;
- if (is_read)
- clib_fifo_reset (sm->rx.buffer_fifo);
- else
- sm->tx.n_total_data_bytes = 0;
- sm->vlib_main = vm;
- m->header.data_function = is_read ? vlib_serialize_rx : vlib_serialize_tx;
- m->stream.data_function_opaque = pointer_to_uword (sm);
-}
-
-void
-serialize_open_vlib_buffer (serialize_main_t * m, vlib_main_t * vm,
- vlib_serialize_buffer_main_t * sm)
-{
- serialize_open_vlib_helper (m, vm, sm, /* is_read */ 0);
-}
-
-void
-unserialize_open_vlib_buffer (serialize_main_t * m, vlib_main_t * vm,
- vlib_serialize_buffer_main_t * sm)
-{
- serialize_open_vlib_helper (m, vm, sm, /* is_read */ 1);
-}
-
-u32
-serialize_close_vlib_buffer (serialize_main_t * m)
-{
- vlib_serialize_buffer_main_t *sm
- = uword_to_pointer (m->stream.data_function_opaque,
- vlib_serialize_buffer_main_t *);
- vlib_buffer_t *last;
- serialize_stream_t *s = &m->stream;
-
- last = vlib_get_buffer (sm->vlib_main, sm->last_buffer);
- last->current_length = s->current_buffer_index;
-
- if (vec_len (s->overflow_buffer) > 0)
- {
- sm->last_buffer
- = vlib_buffer_add_data (sm->vlib_main, sm->tx.free_list_index,
- sm->last_buffer == ~0 ? 0 : sm->last_buffer,
- s->overflow_buffer,
- vec_len (s->overflow_buffer));
- _vec_len (s->overflow_buffer) = 0;
- }
-
- return sm->first_buffer;
-}
-
-void
-unserialize_close_vlib_buffer (serialize_main_t * m)
-{
- vlib_serialize_buffer_main_t *sm
- = uword_to_pointer (m->stream.data_function_opaque,
- vlib_serialize_buffer_main_t *);
- if (sm->first_buffer != ~0)
- vlib_buffer_free_one (sm->vlib_main, sm->first_buffer);
- clib_fifo_reset (sm->rx.buffer_fifo);
- if (m->stream.overflow_buffer)
- _vec_len (m->stream.overflow_buffer) = 0;
-}
-
-static u8 *
-format_vlib_buffer_free_list (u8 * s, va_list * va)
-{
- vlib_buffer_free_list_t *f = va_arg (*va, vlib_buffer_free_list_t *);
- u32 threadnum = va_arg (*va, u32);
- uword bytes_alloc, bytes_free, n_free, size;
-
- if (!f)
- return format (s, "%=7s%=30s%=12s%=12s%=12s%=12s%=12s%=12s",
- "Thread", "Name", "Index", "Size", "Alloc", "Free",
- "#Alloc", "#Free");
-
- size = sizeof (vlib_buffer_t) + f->n_data_bytes;
- n_free = vec_len (f->aligned_buffers) + vec_len (f->unaligned_buffers);
- bytes_alloc = size * f->n_alloc;
- bytes_free = size * n_free;
-
- s = format (s, "%7d%30s%12d%12d%=12U%=12U%=12d%=12d",
- threadnum,
- f->name, f->index, f->n_data_bytes,
- format_memory_size, bytes_alloc,
- format_memory_size, bytes_free, f->n_alloc, n_free);
-
- return s;
-}
-
-static clib_error_t *
-show_buffers (vlib_main_t * vm,
- unformat_input_t * input, vlib_cli_command_t * cmd)
-{
- vlib_buffer_main_t *bm;
- vlib_buffer_free_list_t *f;
- vlib_main_t *curr_vm;
- u32 vm_index = 0;
-
- vlib_cli_output (vm, "%U", format_vlib_buffer_free_list, 0, 0);
-
- do
- {
- curr_vm = vec_len (vlib_mains) ? vlib_mains[vm_index] : vm;
- bm = curr_vm->buffer_main;
-
- /* *INDENT-OFF* */
- pool_foreach (f, bm->buffer_free_list_pool, ({
- vlib_cli_output (vm, "%U", format_vlib_buffer_free_list, f, vm_index);
- }));
- /* *INDENT-ON* */
-
- vm_index++;
- }
- while (vm_index < vec_len (vlib_mains));
-
- return 0;
-}
-
-/* *INDENT-OFF* */
-VLIB_CLI_COMMAND (show_buffers_command, static) = {
- .path = "show buffers",
- .short_help = "Show packet buffer allocation",
- .function = show_buffers,
-};
-/* *INDENT-ON* */
-
-#if CLIB_DEBUG > 0
-
-u32 *vlib_buffer_state_validation_lock;
-uword *vlib_buffer_state_validation_hash;
-void *vlib_buffer_state_heap;
-
-static clib_error_t *
-buffer_state_validation_init (vlib_main_t * vm)
-{
- void *oldheap;
-
- vlib_buffer_state_heap = mheap_alloc (0, 10 << 20);
-
- oldheap = clib_mem_set_heap (vlib_buffer_state_heap);
-
- vlib_buffer_state_validation_hash = hash_create (0, sizeof (uword));
- vec_validate_aligned (vlib_buffer_state_validation_lock, 0,
- CLIB_CACHE_LINE_BYTES);
- clib_mem_set_heap (oldheap);
- return 0;
-}
-
-VLIB_INIT_FUNCTION (buffer_state_validation_init);
-#endif
-
-/** @endcond */
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */
Code Review / vpp.git / commitdiff