pipeline: add SWX Tx and emit instructions

Add header emit and packet transmission instructions. Emit adds to the
output packet a header that is either generated (e.g. read from table
entry by action) or extracted from the input packet. Tx ends the
pipeline processing; discard is implemented by tx to special port.

Signed-off-by: Cristian Dumitrescu <cristian.dumitrescu@intel.com>
This commit is contained in:
Cristian Dumitrescu 2020-10-01 11:19:38 +01:00 committed by David Marchand
parent a1711f948d
commit 99abed441d

View File

@ -213,6 +213,9 @@ enum instruction_type {
/* rx m.port_in */
INSTR_RX,
/* tx m.port_out */
INSTR_TX,
/* extract h.header */
INSTR_HDR_EXTRACT,
INSTR_HDR_EXTRACT2,
@ -222,6 +225,17 @@ enum instruction_type {
INSTR_HDR_EXTRACT6,
INSTR_HDR_EXTRACT7,
INSTR_HDR_EXTRACT8,
/* emit h.header */
INSTR_HDR_EMIT,
INSTR_HDR_EMIT_TX,
INSTR_HDR_EMIT2_TX,
INSTR_HDR_EMIT3_TX,
INSTR_HDR_EMIT4_TX,
INSTR_HDR_EMIT5_TX,
INSTR_HDR_EMIT6_TX,
INSTR_HDR_EMIT7_TX,
INSTR_HDR_EMIT8_TX,
};
struct instr_io {
@ -1635,6 +1649,114 @@ instr_rx_exec(struct rte_swx_pipeline *p)
thread_yield(p);
}
/*
* tx.
*/
static int
instr_tx_translate(struct rte_swx_pipeline *p,
struct action *action __rte_unused,
char **tokens,
int n_tokens,
struct instruction *instr,
struct instruction_data *data __rte_unused)
{
struct field *f;
CHECK(n_tokens == 2, EINVAL);
f = metadata_field_parse(p, tokens[1]);
CHECK(f, EINVAL);
instr->type = INSTR_TX;
instr->io.io.offset = f->offset / 8;
instr->io.io.n_bits = f->n_bits;
return 0;
}
static inline void
emit_handler(struct thread *t)
{
struct header_out_runtime *h0 = &t->headers_out[0];
struct header_out_runtime *h1 = &t->headers_out[1];
uint32_t offset = 0, i;
/* No header change or header decapsulation. */
if ((t->n_headers_out == 1) &&
(h0->ptr + h0->n_bytes == t->ptr)) {
TRACE("Emit handler: no header change or header decap.\n");
t->pkt.offset -= h0->n_bytes;
t->pkt.length += h0->n_bytes;
return;
}
/* Header encapsulation (optionally, with prior header decasulation). */
if ((t->n_headers_out == 2) &&
(h1->ptr + h1->n_bytes == t->ptr) &&
(h0->ptr == h0->ptr0)) {
uint32_t offset;
TRACE("Emit handler: header encapsulation.\n");
offset = h0->n_bytes + h1->n_bytes;
memcpy(t->ptr - offset, h0->ptr, h0->n_bytes);
t->pkt.offset -= offset;
t->pkt.length += offset;
return;
}
/* Header insertion. */
/* TBD */
/* Header extraction. */
/* TBD */
/* For any other case. */
TRACE("Emit handler: complex case.\n");
for (i = 0; i < t->n_headers_out; i++) {
struct header_out_runtime *h = &t->headers_out[i];
memcpy(&t->header_out_storage[offset], h->ptr, h->n_bytes);
offset += h->n_bytes;
}
if (offset) {
memcpy(t->ptr - offset, t->header_out_storage, offset);
t->pkt.offset -= offset;
t->pkt.length += offset;
}
}
static inline void
instr_tx_exec(struct rte_swx_pipeline *p);
static inline void
instr_tx_exec(struct rte_swx_pipeline *p)
{
struct thread *t = &p->threads[p->thread_id];
struct instruction *ip = t->ip;
uint64_t port_id = METADATA_READ(t, ip->io.io.offset, ip->io.io.n_bits);
struct port_out_runtime *port = &p->out[port_id];
struct rte_swx_pkt *pkt = &t->pkt;
TRACE("[Thread %2u]: tx 1 pkt to port %u\n",
p->thread_id,
(uint32_t)port_id);
/* Headers. */
emit_handler(t);
/* Packet. */
port->pkt_tx(port->obj, pkt);
/* Thread. */
thread_ip_reset(p, t);
instr_rx_exec(p);
}
/*
* extract.
*/
@ -1797,6 +1919,185 @@ instr_hdr_extract8_exec(struct rte_swx_pipeline *p)
thread_ip_inc(p);
}
/*
* emit.
*/
static int
instr_hdr_emit_translate(struct rte_swx_pipeline *p,
struct action *action __rte_unused,
char **tokens,
int n_tokens,
struct instruction *instr,
struct instruction_data *data __rte_unused)
{
struct header *h;
CHECK(n_tokens == 2, EINVAL);
h = header_parse(p, tokens[1]);
CHECK(h, EINVAL);
instr->type = INSTR_HDR_EMIT;
instr->io.hdr.header_id[0] = h->id;
instr->io.hdr.struct_id[0] = h->struct_id;
instr->io.hdr.n_bytes[0] = h->st->n_bits / 8;
return 0;
}
static inline void
__instr_hdr_emit_exec(struct rte_swx_pipeline *p, uint32_t n_emit);
static inline void
__instr_hdr_emit_exec(struct rte_swx_pipeline *p, uint32_t n_emit)
{
struct thread *t = &p->threads[p->thread_id];
struct instruction *ip = t->ip;
uint32_t n_headers_out = t->n_headers_out;
struct header_out_runtime *ho = &t->headers_out[n_headers_out - 1];
uint8_t *ho_ptr = NULL;
uint32_t ho_nbytes = 0, i;
for (i = 0; i < n_emit; i++) {
uint32_t header_id = ip->io.hdr.header_id[i];
uint32_t struct_id = ip->io.hdr.struct_id[i];
uint32_t n_bytes = ip->io.hdr.n_bytes[i];
struct header_runtime *hi = &t->headers[header_id];
uint8_t *hi_ptr = t->structs[struct_id];
TRACE("[Thread %2u]: emit header %u\n",
p->thread_id,
header_id);
/* Headers. */
if (!i) {
if (!t->n_headers_out) {
ho = &t->headers_out[0];
ho->ptr0 = hi->ptr0;
ho->ptr = hi_ptr;
ho_ptr = hi_ptr;
ho_nbytes = n_bytes;
n_headers_out = 1;
continue;
} else {
ho_ptr = ho->ptr;
ho_nbytes = ho->n_bytes;
}
}
if (ho_ptr + ho_nbytes == hi_ptr) {
ho_nbytes += n_bytes;
} else {
ho->n_bytes = ho_nbytes;
ho++;
ho->ptr0 = hi->ptr0;
ho->ptr = hi_ptr;
ho_ptr = hi_ptr;
ho_nbytes = n_bytes;
n_headers_out++;
}
}
ho->n_bytes = ho_nbytes;
t->n_headers_out = n_headers_out;
}
static inline void
instr_hdr_emit_exec(struct rte_swx_pipeline *p)
{
__instr_hdr_emit_exec(p, 1);
/* Thread. */
thread_ip_inc(p);
}
static inline void
instr_hdr_emit_tx_exec(struct rte_swx_pipeline *p)
{
TRACE("[Thread %2u] *** The next 2 instructions are fused. ***\n",
p->thread_id);
__instr_hdr_emit_exec(p, 1);
instr_tx_exec(p);
}
static inline void
instr_hdr_emit2_tx_exec(struct rte_swx_pipeline *p)
{
TRACE("[Thread %2u] *** The next 3 instructions are fused. ***\n",
p->thread_id);
__instr_hdr_emit_exec(p, 2);
instr_tx_exec(p);
}
static inline void
instr_hdr_emit3_tx_exec(struct rte_swx_pipeline *p)
{
TRACE("[Thread %2u] *** The next 4 instructions are fused. ***\n",
p->thread_id);
__instr_hdr_emit_exec(p, 3);
instr_tx_exec(p);
}
static inline void
instr_hdr_emit4_tx_exec(struct rte_swx_pipeline *p)
{
TRACE("[Thread %2u] *** The next 5 instructions are fused. ***\n",
p->thread_id);
__instr_hdr_emit_exec(p, 4);
instr_tx_exec(p);
}
static inline void
instr_hdr_emit5_tx_exec(struct rte_swx_pipeline *p)
{
TRACE("[Thread %2u] *** The next 6 instructions are fused. ***\n",
p->thread_id);
__instr_hdr_emit_exec(p, 5);
instr_tx_exec(p);
}
static inline void
instr_hdr_emit6_tx_exec(struct rte_swx_pipeline *p)
{
TRACE("[Thread %2u] *** The next 7 instructions are fused. ***\n",
p->thread_id);
__instr_hdr_emit_exec(p, 6);
instr_tx_exec(p);
}
static inline void
instr_hdr_emit7_tx_exec(struct rte_swx_pipeline *p)
{
TRACE("[Thread %2u] *** The next 8 instructions are fused. ***\n",
p->thread_id);
__instr_hdr_emit_exec(p, 7);
instr_tx_exec(p);
}
static inline void
instr_hdr_emit8_tx_exec(struct rte_swx_pipeline *p)
{
TRACE("[Thread %2u] *** The next 9 instructions are fused. ***\n",
p->thread_id);
__instr_hdr_emit_exec(p, 8);
instr_tx_exec(p);
}
#define RTE_SWX_INSTRUCTION_TOKENS_MAX 16
static int
@ -1842,6 +2143,14 @@ instr_translate(struct rte_swx_pipeline *p,
instr,
data);
if (!strcmp(tokens[tpos], "tx"))
return instr_tx_translate(p,
action,
&tokens[tpos],
n_tokens - tpos,
instr,
data);
if (!strcmp(tokens[tpos], "extract"))
return instr_hdr_extract_translate(p,
action,
@ -1850,6 +2159,14 @@ instr_translate(struct rte_swx_pipeline *p,
instr,
data);
if (!strcmp(tokens[tpos], "emit"))
return instr_hdr_emit_translate(p,
action,
&tokens[tpos],
n_tokens - tpos,
instr,
data);
CHECK(0, EINVAL);
}
@ -1971,6 +2288,7 @@ typedef void (*instr_exec_t)(struct rte_swx_pipeline *);
static instr_exec_t instruction_table[] = {
[INSTR_RX] = instr_rx_exec,
[INSTR_TX] = instr_tx_exec,
[INSTR_HDR_EXTRACT] = instr_hdr_extract_exec,
[INSTR_HDR_EXTRACT2] = instr_hdr_extract2_exec,
@ -1980,6 +2298,16 @@ static instr_exec_t instruction_table[] = {
[INSTR_HDR_EXTRACT6] = instr_hdr_extract6_exec,
[INSTR_HDR_EXTRACT7] = instr_hdr_extract7_exec,
[INSTR_HDR_EXTRACT8] = instr_hdr_extract8_exec,
[INSTR_HDR_EMIT] = instr_hdr_emit_exec,
[INSTR_HDR_EMIT_TX] = instr_hdr_emit_tx_exec,
[INSTR_HDR_EMIT2_TX] = instr_hdr_emit2_tx_exec,
[INSTR_HDR_EMIT3_TX] = instr_hdr_emit3_tx_exec,
[INSTR_HDR_EMIT4_TX] = instr_hdr_emit4_tx_exec,
[INSTR_HDR_EMIT5_TX] = instr_hdr_emit5_tx_exec,
[INSTR_HDR_EMIT6_TX] = instr_hdr_emit6_tx_exec,
[INSTR_HDR_EMIT7_TX] = instr_hdr_emit7_tx_exec,
[INSTR_HDR_EMIT8_TX] = instr_hdr_emit8_tx_exec,
};
static inline void