svm_fifo_segment_main_t svm_fifo_segment_main;
static void
-preallocate_fifo_pairs (svm_fifo_segment_header_t * fsh,
- svm_fifo_segment_create_args_t * a)
+allocate_new_fifo_chunk (svm_fifo_segment_header_t * fsh,
+ u32 data_size_in_bytes, int chunk_size)
{
- u32 rx_fifo_size, tx_fifo_size;
+ int freelist_index;
+ u32 size;
+ u8 *fifo_space;
+ u32 rounded_data_size;
+ svm_fifo_t *f;
+ int i;
+
+ rounded_data_size = (1 << (max_log2 (data_size_in_bytes)));
+ freelist_index = max_log2 (rounded_data_size)
+ - max_log2 (FIFO_SEGMENT_MIN_FIFO_SIZE);
+
+ /* Calculate space requirement $$$ round-up data_size_in_bytes */
+ size = (sizeof (*f) + rounded_data_size) * chunk_size;
+
+ /* Allocate fifo space. May fail. */
+ fifo_space = clib_mem_alloc_aligned_at_offset
+ (size, CLIB_CACHE_LINE_BYTES, 0 /* align_offset */ ,
+ 0 /* os_out_of_memory */ );
+
+ /* Out of space.. */
+ if (fifo_space == 0)
+ return;
+
+ /* Carve fifo space */
+ f = (svm_fifo_t *) fifo_space;
+ for (i = 0; i < chunk_size; i++)
+ {
+ f->freelist_index = freelist_index;
+ f->next = fsh->free_fifos[freelist_index];
+ fsh->free_fifos[freelist_index] = f;
+ fifo_space += sizeof (*f) + rounded_data_size;
+ f = (svm_fifo_t *) fifo_space;
+ }
+}
+
+static void
+preallocate_fifo_pairs (svm_fifo_segment_private_t * s,
+ svm_fifo_segment_create_args_t * a, u32 protect_size)
+{
+ svm_fifo_segment_header_t *fsh = s->h;
+ u32 rx_fifo_size, tx_fifo_size, pairs_to_allocate;
+ u32 rx_rounded_data_size, tx_rounded_data_size, pair_size;
svm_fifo_t *f;
u8 *rx_fifo_space, *tx_fifo_space;
+ int rx_freelist_index, tx_freelist_index;
int i;
/* Parameter check */
|| a->preallocated_fifo_pairs == 0)
return;
- /* Calculate space requirements */
- rx_fifo_size = (sizeof (*f) + a->rx_fifo_size) * a->preallocated_fifo_pairs;
- tx_fifo_size = (sizeof (*f) + a->tx_fifo_size) * a->preallocated_fifo_pairs;
+ if (a->rx_fifo_size < FIFO_SEGMENT_MIN_FIFO_SIZE ||
+ a->rx_fifo_size > FIFO_SEGMENT_MAX_FIFO_SIZE)
+ {
+ clib_warning ("rx fifo_size out of range %d", a->rx_fifo_size);
+ return;
+ }
+
+ if (a->tx_fifo_size < FIFO_SEGMENT_MIN_FIFO_SIZE ||
+ a->tx_fifo_size > FIFO_SEGMENT_MAX_FIFO_SIZE)
+ {
+ clib_warning ("tx fifo_size out of range %d", a->rx_fifo_size);
+ return;
+ }
+
+ rx_rounded_data_size = (1 << (max_log2 (a->rx_fifo_size)));
+
+ rx_freelist_index = max_log2 (a->rx_fifo_size)
+ - max_log2 (FIFO_SEGMENT_MIN_FIFO_SIZE);
- if (0)
- clib_warning ("rx_fifo_size %u (%d mb), tx_fifo_size %u (%d mb)",
- rx_fifo_size, rx_fifo_size >> 20,
- tx_fifo_size, tx_fifo_size >> 20);
+ tx_rounded_data_size = (1 << (max_log2 (a->rx_fifo_size)));
+
+ tx_freelist_index = max_log2 (a->tx_fifo_size)
+ - max_log2 (FIFO_SEGMENT_MIN_FIFO_SIZE);
+
+ /* Calculate space requirements */
+ pair_size = 2 * sizeof (*f) + rx_rounded_data_size + tx_rounded_data_size;
+ if (protect_size)
+ protect_size += mheap_bytes (s->ssvm.sh->heap);
+ pairs_to_allocate =
+ clib_min ((s->ssvm.ssvm_size - protect_size) / pair_size,
+ a->preallocated_fifo_pairs);
+ rx_fifo_size = (sizeof (*f) + rx_rounded_data_size) * pairs_to_allocate;
+ tx_fifo_size = (sizeof (*f) + tx_rounded_data_size) * pairs_to_allocate;
+
+ vec_validate_init_empty (fsh->free_fifos,
+ clib_max (rx_freelist_index, tx_freelist_index),
+ 0);
/* Allocate rx fifo space. May fail. */
rx_fifo_space = clib_mem_alloc_aligned_at_offset
/* Carve rx fifo space */
f = (svm_fifo_t *) rx_fifo_space;
- for (i = 0; i < a->preallocated_fifo_pairs; i++)
+ for (i = 0; i < pairs_to_allocate; i++)
{
- f->next = fsh->free_fifos[FIFO_SEGMENT_RX_FREELIST];
- fsh->free_fifos[FIFO_SEGMENT_RX_FREELIST] = f;
- rx_fifo_space += sizeof (*f) + a->rx_fifo_size;
+ f->freelist_index = rx_freelist_index;
+ f->next = fsh->free_fifos[rx_freelist_index];
+ fsh->free_fifos[rx_freelist_index] = f;
+ rx_fifo_space += sizeof (*f) + rx_rounded_data_size;
f = (svm_fifo_t *) rx_fifo_space;
}
/* Carve tx fifo space */
f = (svm_fifo_t *) tx_fifo_space;
- for (i = 0; i < a->preallocated_fifo_pairs; i++)
+ for (i = 0; i < pairs_to_allocate; i++)
{
- f->next = fsh->free_fifos[FIFO_SEGMENT_TX_FREELIST];
- fsh->free_fifos[FIFO_SEGMENT_TX_FREELIST] = f;
- tx_fifo_space += sizeof (*f) + a->tx_fifo_size;
+ f->freelist_index = tx_freelist_index;
+ f->next = fsh->free_fifos[tx_freelist_index];
+ fsh->free_fifos[tx_freelist_index] = f;
+ tx_fifo_space += sizeof (*f) + tx_rounded_data_size;
f = (svm_fifo_t *) tx_fifo_space;
}
+
+ /* Account for the pairs allocated */
+ a->preallocated_fifo_pairs -= pairs_to_allocate;
}
-/** (master) create an svm fifo segment */
+/**
+ * Create an svm fifo segment and initialize as master
+ */
int
svm_fifo_segment_create (svm_fifo_segment_create_args_t * a)
{
- int rv;
- svm_fifo_segment_private_t *s;
svm_fifo_segment_main_t *sm = &svm_fifo_segment_main;
+ svm_fifo_segment_private_t *s;
ssvm_shared_header_t *sh;
svm_fifo_segment_header_t *fsh;
void *oldheap;
+ int rv;
/* Allocate a fresh segment */
pool_get (sm->segments, s);
s->ssvm.name = format (0, "%s%c", a->segment_name, 0);
s->ssvm.requested_va = sm->next_baseva;
- rv = ssvm_master_init (&s->ssvm, s - sm->segments);
-
- if (rv)
+ if ((rv = ssvm_master_init (&s->ssvm, a->segment_type)))
{
- _vec_len (s) = vec_len (s) - 1;
+ pool_put (sm->segments, s);
return (rv);
}
- /* Note; requested_va updated due to seg base addr randomization */
- sm->next_baseva = s->ssvm.requested_va + a->segment_size;
+ /* Note: requested_va updated due to seg base addr randomization */
+ sm->next_baseva = s->ssvm.sh->ssvm_va + a->segment_size;
sh = s->ssvm.sh;
oldheap = ssvm_push_heap (sh);
/* Set up svm_fifo_segment shared header */
fsh = clib_mem_alloc (sizeof (*fsh));
memset (fsh, 0, sizeof (*fsh));
- sh->opaque[0] = fsh;
- s->h = fsh;
- fsh->segment_name = format (0, "%s%c", a->segment_name, 0);
-
- preallocate_fifo_pairs (fsh, a);
+ s->h = sh->opaque[0] = fsh;
+ preallocate_fifo_pairs (s, a, a->seg_protected_space);
ssvm_pop_heap (oldheap);
return (0);
}
-/** Create an svm fifo segment in process-private memory */
+/**
+ * Create an svm fifo segment in process-private memory
+ */
int
svm_fifo_segment_create_process_private (svm_fifo_segment_create_args_t * a)
{
u8 **heaps = 0;
mheap_t *heap_header;
int segment_count = 1;
+ u32 rnd_size = 0;
int i;
- if (a->private_segment_count && a->private_segment_size)
+ if (a->private_segment_count)
{
- void *mem;
u8 *heap;
u32 pagesize = clib_mem_get_page_size ();
- u32 rnd_size;
+ rnd_size = (a->segment_size + (pagesize - 1)) & ~pagesize;
for (i = 0; i < a->private_segment_count; i++)
{
- rnd_size = (a->private_segment_size + (pagesize - 1)) & ~pagesize;
-
- mem = mmap (0, rnd_size, PROT_READ | PROT_WRITE,
- MAP_PRIVATE | MAP_ANONYMOUS,
- -1 /* fd */ , 0 /* offset */ );
-
- if (mem == MAP_FAILED)
+ heap = mheap_alloc (0, rnd_size);
+ if (heap == 0)
{
- clib_unix_warning ("mmap");
+ clib_unix_warning ("mheap alloc");
return -1;
}
- heap = mheap_alloc (mem, rnd_size);
heap_header = mheap_header (heap);
heap_header->flags |= MHEAP_FLAG_THREAD_SAFE;
vec_add1 (heaps, heap);
segment_count = a->private_segment_count;
}
- /* Spread preallocated fifo pairs across segments */
- a->preallocated_fifo_pairs /= segment_count;
-
/* Allocate segments */
for (i = 0; i < segment_count; i++)
{
pool_get (sm->segments, s);
memset (s, 0, sizeof (*s));
- s->ssvm.ssvm_size = ~0;
+ s->ssvm.ssvm_size = rnd_size;
s->ssvm.i_am_master = 1;
s->ssvm.my_pid = getpid ();
s->ssvm.name = format (0, "%s%c", a->segment_name, 0);
/* Set up svm_fifo_segment shared header */
fsh = clib_mem_alloc (sizeof (*fsh));
memset (fsh, 0, sizeof (*fsh));
- sh->opaque[0] = fsh;
- s->h = fsh;
- fsh->segment_name = format (0, "%s%c", a->segment_name, 0);
+ fsh->flags = FIFO_SEGMENT_F_IS_PRIVATE;
+ s->h = sh->opaque[0] = fsh;
+ if (!a->private_segment_count)
+ fsh->flags |= FIFO_SEGMENT_F_IS_MAIN_HEAP;
if (a->private_segment_count)
{
+ if (i != 0)
+ fsh->flags |= FIFO_SEGMENT_F_IS_PREALLOCATED;
oldheap = clib_mem_get_heap ();
clib_mem_set_heap (sh->heap);
- preallocate_fifo_pairs (fsh, a);
+ preallocate_fifo_pairs (s, a, i == 0 ? a->seg_protected_space : 0);
clib_mem_set_heap (oldheap);
}
-
sh->ready = 1;
vec_add1 (a->new_segment_indices, s - sm->segments);
}
return (0);
}
-/** (slave) attach to an svm fifo segment */
+/**
+ * Attach as slave to an svm fifo segment
+ */
int
svm_fifo_segment_attach (svm_fifo_segment_create_args_t * a)
{
- int rv;
- svm_fifo_segment_private_t *s;
svm_fifo_segment_main_t *sm = &svm_fifo_segment_main;
- ssvm_shared_header_t *sh;
- svm_fifo_segment_header_t *fsh;
+ svm_fifo_segment_private_t *s;
+ int rv;
/* Allocate a fresh segment */
pool_get (sm->segments, s);
s->ssvm.my_pid = getpid ();
s->ssvm.name = format (0, "%s%c", a->segment_name, 0);
s->ssvm.requested_va = sm->next_baseva;
+ if (a->segment_type == SSVM_SEGMENT_MEMFD)
+ s->ssvm.fd = a->memfd_fd;
+ else
+ s->ssvm.attach_timeout = sm->timeout_in_seconds;
- rv = ssvm_slave_init (&s->ssvm, sm->timeout_in_seconds);
-
- if (rv)
+ if ((rv = ssvm_slave_init (&s->ssvm, a->segment_type)))
{
_vec_len (s) = vec_len (s) - 1;
return (rv);
}
/* Fish the segment header */
- sh = s->ssvm.sh;
- fsh = (svm_fifo_segment_header_t *) sh->opaque[0];
- s->h = fsh;
+ s->h = s->ssvm.sh->opaque[0];
vec_add1 (a->new_segment_indices, s - sm->segments);
return (0);
svm_fifo_segment_delete (svm_fifo_segment_private_t * s)
{
svm_fifo_segment_main_t *sm = &svm_fifo_segment_main;
- ssvm_delete (&s->ssvm);
+
+ if (s->h->flags & FIFO_SEGMENT_F_IS_PRIVATE)
+ {
+ /* Don't try to free vpp's heap! */
+ if (!(s->h->flags & FIFO_SEGMENT_F_IS_MAIN_HEAP))
+ mheap_free (s->ssvm.sh->heap);
+ clib_mem_free (s->ssvm.sh);
+ clib_mem_free (s->h);
+ }
+ else
+ {
+ ssvm_delete (&s->ssvm);
+ }
+ memset (s, 0xfe, sizeof (*s));
pool_put (sm->segments, s);
}
+/**
+ * Allocate fifo in svm segment
+ */
svm_fifo_t *
svm_fifo_segment_alloc_fifo (svm_fifo_segment_private_t * s,
u32 data_size_in_bytes,
svm_fifo_segment_header_t *fsh;
svm_fifo_t *f;
void *oldheap;
+ int freelist_index;
+
+ /*
+ * 4K minimum. It's not likely that anything good will happen
+ * with a smaller FIFO.
+ */
+ if (data_size_in_bytes < FIFO_SEGMENT_MIN_FIFO_SIZE ||
+ data_size_in_bytes > FIFO_SEGMENT_MAX_FIFO_SIZE)
+ {
+ clib_warning ("fifo size out of range %d", data_size_in_bytes);
+ return 0;
+ }
+
+ freelist_index = max_log2 (data_size_in_bytes)
+ - max_log2 (FIFO_SEGMENT_MIN_FIFO_SIZE);
sh = s->ssvm.sh;
fsh = (svm_fifo_segment_header_t *) sh->opaque[0];
{
case FIFO_SEGMENT_RX_FREELIST:
case FIFO_SEGMENT_TX_FREELIST:
- f = fsh->free_fifos[list_index];
- if (f)
+ vec_validate_init_empty (fsh->free_fifos, freelist_index, 0);
+
+ f = fsh->free_fifos[freelist_index];
+ if (PREDICT_FALSE (f == 0))
+ {
+ allocate_new_fifo_chunk (fsh, data_size_in_bytes,
+ FIFO_SEGMENT_ALLOC_CHUNK_SIZE);
+ f = fsh->free_fifos[freelist_index];
+ }
+ if (PREDICT_TRUE (f != 0))
{
- fsh->free_fifos[list_index] = f->next;
+ fsh->free_fifos[freelist_index] = f->next;
/* (re)initialize the fifo, as in svm_fifo_create */
memset (f, 0, sizeof (*f));
f->nitems = data_size_in_bytes;
f->ooos_list_head = OOO_SEGMENT_INVALID_INDEX;
+ f->refcnt = 1;
+ f->freelist_index = freelist_index;
goto found;
}
/* FALLTHROUGH */
ssvm_unlock_non_recursive (sh);
return (0);
}
+ f->freelist_index = freelist_index;
found:
/* If rx_freelist add to active fifos list. When cleaning up segment,
}
fsh->fifos = f;
}
+ fsh->n_active_fifos++;
ssvm_pop_heap (oldheap);
ssvm_unlock_non_recursive (sh);
ssvm_shared_header_t *sh;
svm_fifo_segment_header_t *fsh;
void *oldheap;
+ int freelist_index;
+
+ ASSERT (f->refcnt > 0);
+ if (--f->refcnt > 0)
+ return;
sh = s->ssvm.sh;
fsh = (svm_fifo_segment_header_t *) sh->opaque[0];
+ freelist_index = f->freelist_index;
+
+ ASSERT (freelist_index < vec_len (fsh->free_fifos));
+
ssvm_lock_non_recursive (sh, 2);
oldheap = ssvm_push_heap (sh);
/* Fall through: we add only rx fifos to active pool */
case FIFO_SEGMENT_TX_FREELIST:
/* Add to free list */
- f->next = fsh->free_fifos[list_index];
+ f->next = fsh->free_fifos[freelist_index];
f->prev = 0;
- fsh->free_fifos[list_index] = f;
+ fsh->free_fifos[freelist_index] = f;
break;
case FIFO_SEGMENT_FREELIST_NONE:
break;
f->master_thread_index = ~0;
}
+ fsh->n_active_fifos--;
ssvm_pop_heap (oldheap);
ssvm_unlock_non_recursive (sh);
}
return s - svm_fifo_segment_main.segments;
}
+/**
+ * Retrieve svm segments pool. Used only for debug purposes.
+ */
+svm_fifo_segment_private_t *
+svm_fifo_segment_segments_pool (void)
+{
+ svm_fifo_segment_main_t *sm = &svm_fifo_segment_main;
+ return sm->segments;
+}
+
+/**
+ * Get number of active fifos
+ */
+u32
+svm_fifo_segment_num_fifos (svm_fifo_segment_private_t * fifo_segment)
+{
+ return fifo_segment->h->n_active_fifos;
+}
+
+u32
+svm_fifo_segment_num_free_fifos (svm_fifo_segment_private_t * fifo_segment,
+ u32 fifo_size_in_bytes)
+{
+ ssvm_shared_header_t *sh;
+ svm_fifo_segment_header_t *fsh;
+ svm_fifo_t *f;
+ int i;
+ u32 count = 0, rounded_data_size, freelist_index;
+
+ sh = fifo_segment->ssvm.sh;
+ fsh = (svm_fifo_segment_header_t *) sh->opaque[0];
+
+ /* Count all free fifos? */
+ if (fifo_size_in_bytes == ~0)
+ {
+ for (i = 0; i < vec_len (fsh->free_fifos); i++)
+ {
+ f = fsh->free_fifos[i];
+ if (f == 0)
+ continue;
+
+ while (f)
+ {
+ f = f->next;
+ count++;
+ }
+ }
+ return count;
+ }
+
+ rounded_data_size = (1 << (max_log2 (fifo_size_in_bytes)));
+ freelist_index = max_log2 (rounded_data_size)
+ - max_log2 (FIFO_SEGMENT_MIN_FIFO_SIZE);
+
+ if (freelist_index > vec_len (fsh->free_fifos))
+ return 0;
+
+ f = fsh->free_fifos[freelist_index];
+ if (f == 0)
+ return 0;
+
+ while (f)
+ {
+ f = f->next;
+ count++;
+ }
+ return count;
+}
+
+void
+svm_fifo_segment_info (svm_fifo_segment_private_t * seg, uword * address,
+ u64 * size)
+{
+ if (seg->h->flags & FIFO_SEGMENT_F_IS_PRIVATE)
+ {
+ mheap_t *heap_header;
+
+ *address = pointer_to_uword (seg->ssvm.sh->heap);
+ heap_header = mheap_header (seg->ssvm.sh->heap);
+ *size = heap_header->max_size;
+ }
+ else
+ {
+ *address = seg->ssvm.sh->ssvm_va;
+ *size = seg->ssvm.ssvm_size;
+ }
+}
+
+mheap_t *
+svm_fifo_segment_heap (svm_fifo_segment_private_t * seg)
+{
+ return seg->ssvm.sh->heap;
+}
+
+u8 *
+format_svm_fifo_segment_type (u8 * s, va_list * args)
+{
+ svm_fifo_segment_private_t *sp;
+ sp = va_arg (*args, svm_fifo_segment_private_t *);
+ ssvm_segment_type_t st = ssvm_type (&sp->ssvm);
+
+ if ((sp->h->flags & FIFO_SEGMENT_F_IS_PRIVATE)
+ && !(sp->h->flags & FIFO_SEGMENT_F_IS_MAIN_HEAP))
+ s = format (s, "%s", "private-heap");
+ else if ((sp->h->flags & FIFO_SEGMENT_F_IS_PRIVATE)
+ && (sp->h->flags & FIFO_SEGMENT_F_IS_MAIN_HEAP))
+ s = format (s, "%s", "main-heap");
+ else if (st == SSVM_SEGMENT_MEMFD)
+ s = format (s, "%s", "memfd");
+ else if (st == SSVM_SEGMENT_SHM)
+ s = format (s, "%s", "shm");
+ else
+ s = format (s, "%s", "unknown");
+ return s;
+}
+
+/**
+ * Segment format function
+ */
+u8 *
+format_svm_fifo_segment (u8 * s, va_list * args)
+{
+ svm_fifo_segment_private_t *sp
+ = va_arg (*args, svm_fifo_segment_private_t *);
+ int verbose = va_arg (*args, int);
+ svm_fifo_segment_header_t *fsh = sp->h;
+ u32 count, indent;
+ svm_fifo_t *f;
+ int i;
+
+ indent = format_get_indent (s) + 2;
+ s = format (s, "%U segment heap: %U\n", format_white_space, indent,
+ format_mheap, svm_fifo_segment_heap (sp), verbose);
+ s = format (s, "%U segment has %u active fifos\n",
+ format_white_space, indent, svm_fifo_segment_num_fifos (sp));
+
+ for (i = 0; i < vec_len (fsh->free_fifos); i++)
+ {
+ f = fsh->free_fifos[i];
+ if (f == 0)
+ continue;
+ count = 0;
+ while (f)
+ {
+ f = f->next;
+ count++;
+ }
+
+ s = format (s, "%U%-5u Kb: %u free",
+ format_white_space, indent + 2,
+ 1 << (i + max_log2 (FIFO_SEGMENT_MIN_FIFO_SIZE) - 10),
+ count);
+ }
+ return s;
+}
+
/*
* fd.io coding-style-patch-verification: ON
*
Code Review / vpp.git / blobdiff