Added new instruction called "movh" to read/write the upper half of an
IPv6 address, i.e. bits 127-64 of a 128-bit field.
Signed-off-by: Cristian Dumitrescu <cristian.dumitre...@intel.com>
---
lib/pipeline/rte_swx_pipeline.c | 99 ++++++++++++++++++++++++
lib/pipeline/rte_swx_pipeline_internal.h | 52 ++++++++++++-
2 files changed, 147 insertions(+), 4 deletions(-)
diff --git a/lib/pipeline/rte_swx_pipeline.c b/lib/pipeline/rte_swx_pipeline.c
index da37eda231..12f335005d 100644
--- a/lib/pipeline/rte_swx_pipeline.c
+++ b/lib/pipeline/rte_swx_pipeline.c
@@ -3359,6 +3359,61 @@ instr_mov_i_exec(struct rte_swx_pipeline *p)
thread_ip_inc(p);
}
+/*
+ * movh.
+ */
+static int
+instr_movh_translate(struct rte_swx_pipeline *p,
+ struct action *action,
+ char **tokens,
+ int n_tokens,
+ struct instruction *instr,
+ struct instruction_data *data __rte_unused)
+{
+ char *dst = tokens[1], *src = tokens[2];
+ struct field *fdst, *fsrc;
+ uint32_t dst_struct_id = 0, src_struct_id = 0;
+
+ CHECK(n_tokens == 3, EINVAL);
+
+ fdst = struct_field_parse(p, NULL, dst, &dst_struct_id);
+ CHECK(fdst, EINVAL);
+ CHECK(!fdst->var_size, EINVAL);
+
+ fsrc = struct_field_parse(p, action, src, &src_struct_id);
+ CHECK(fsrc, EINVAL);
+ CHECK(!fsrc->var_size, EINVAL);
+
+ /* MOVH_64_128, MOVH_128_64. */
+ if ((dst[0] == 'h' && fdst->n_bits == 64 && fsrc->n_bits == 128) ||
+ (fdst->n_bits == 128 && src[0] == 'h' && fsrc->n_bits == 64)) {
+ instr->type = INSTR_MOVH;
+
+ instr->mov.dst.struct_id = (uint8_t)dst_struct_id;
+ instr->mov.dst.n_bits = fdst->n_bits;
+ instr->mov.dst.offset = fdst->offset / 8;
+
+ instr->mov.src.struct_id = (uint8_t)src_struct_id;
+ instr->mov.src.n_bits = fsrc->n_bits;
+ instr->mov.src.offset = fsrc->offset / 8;
+ return 0;
+ }
+
+ CHECK(0, EINVAL);
+}
+
+static inline void
+instr_movh_exec(struct rte_swx_pipeline *p)
+{
+ struct thread *t = &p->threads[p->thread_id];
+ struct instruction *ip = t->ip;
+
+ __instr_movh_exec(p, t, ip);
+
+ /* Thread. */
+ thread_ip_inc(p);
+}
+
/*
* dma.
*/
@@ -6427,6 +6482,14 @@ instr_translate(struct rte_swx_pipeline *p,
instr,
data);
+ if (!strcmp(tokens[tpos], "movh"))
+ return instr_movh_translate(p,
+ action,
+ &tokens[tpos],
+ n_tokens - tpos,
+ instr,
+ data);
+
if (!strcmp(tokens[tpos], "add"))
return instr_alu_add_translate(p,
action,
@@ -7463,6 +7526,8 @@ static instr_exec_t instruction_table[] = {
[INSTR_MOV_128_32] = instr_mov_128_32_exec,
[INSTR_MOV_I] = instr_mov_i_exec,
+ [INSTR_MOVH] = instr_movh_exec,
+
[INSTR_DMA_HT] = instr_dma_ht_exec,
[INSTR_DMA_HT2] = instr_dma_ht2_exec,
[INSTR_DMA_HT3] = instr_dma_ht3_exec,
@@ -11788,6 +11853,8 @@ instr_type_to_name(struct instruction *instr)
case INSTR_MOV_128_32: return "INSTR_MOV_128_32";
case INSTR_MOV_I: return "INSTR_MOV_I";
+ case INSTR_MOVH: return "INSTR_MOVH";
+
case INSTR_DMA_HT: return "INSTR_DMA_HT";
case INSTR_DMA_HT2: return "INSTR_DMA_HT2";
case INSTR_DMA_HT3: return "INSTR_DMA_HT3";
@@ -12181,6 +12248,34 @@ instr_mov_export(struct instruction *instr, FILE *f)
instr->mov.src_val);
}
+static void
+instr_movh_export(struct instruction *instr, FILE *f)
+{
+ fprintf(f,
+ "\t{\n"
+ "\t\t.type = %s,\n"
+ "\t\t.mov = {\n"
+ "\t\t\t.dst = {\n"
+ "\t\t\t\t.struct_id = %u,\n"
+ "\t\t\t\t.n_bits = %u,\n"
+ "\t\t\t\t.offset = %u,\n"
+ "\t\t\t},\n"
+ "\t\t\t.src = {\n"
+ "\t\t\t\t.struct_id = %u,\n"
+ "\t\t\t\t.n_bits = %u,\n"
+ "\t\t\t\t.offset = %u,\n"
+ "\t\t\t},\n"
+ "\t\t},\n"
+ "\t},\n",
+ instr_type_to_name(instr),
+ instr->mov.dst.struct_id,
+ instr->mov.dst.n_bits,
+ instr->mov.dst.offset,
+ instr->mov.src.struct_id,
+ instr->mov.src.n_bits,
+ instr->mov.src.offset);
+}
+
static void
instr_dma_ht_export(struct instruction *instr, FILE *f)
{
@@ -12829,6 +12924,8 @@ static instruction_export_t export_table[] = {
[INSTR_MOV_128_32] = instr_mov_export,
[INSTR_MOV_I] = instr_mov_export,
+ [INSTR_MOVH] = instr_movh_export,
+
[INSTR_DMA_HT] = instr_dma_ht_export,
[INSTR_DMA_HT2] = instr_dma_ht_export,
[INSTR_DMA_HT3] = instr_dma_ht_export,
@@ -13058,6 +13155,8 @@ instr_type_to_func(struct instruction *instr)
case INSTR_MOV_128_32: return "__instr_mov_128_32_exec";
case INSTR_MOV_I: return "__instr_mov_i_exec";
+ case INSTR_MOVH: return "__instr_movh_exec";
+
case INSTR_DMA_HT: return "__instr_dma_ht_exec";
case INSTR_DMA_HT2: return "__instr_dma_ht2_exec";
case INSTR_DMA_HT3: return "__instr_dma_ht3_exec";
diff --git a/lib/pipeline/rte_swx_pipeline_internal.h
b/lib/pipeline/rte_swx_pipeline_internal.h
index 8ec12263b9..7ae7622329 100644
--- a/lib/pipeline/rte_swx_pipeline_internal.h
+++ b/lib/pipeline/rte_swx_pipeline_internal.h
@@ -244,20 +244,34 @@ struct header_out_runtime {
* Instruction.
*/
-/* Packet headers are always in Network Byte Order (NBO), i.e. big endian.
+/* Operand endianness conventions:
+ *
+ * Case 1: Small fields (i.e. fields with size <= 64 bits)
+ *
+ * Packet headers are always in Network Byte Order (NBO), i.e. big endian.
* Packet meta-data fields are always assumed to be in Host Byte Order (HBO).
* Table entry fields can be in either NBO or HBO; they are assumed to be in
HBO
* when transferred to packet meta-data and in NBO when transferred to packet
* headers.
- */
-
-/* Notation conventions:
+ *
+ * Notation conventions:
* -Header field: H = h.header.field (dst/src)
* -Meta-data field: M = m.field (dst/src)
* -Extern object mailbox field: E = e.field (dst/src)
* -Extern function mailbox field: F = f.field (dst/src)
* -Table action data field: T = t.field (src only)
* -Immediate value: I = 32-bit unsigned value (src only)
+ *
+ * Case 2: Big fields (i.e. fields with size > 64 bits)
+ *
+ * The big fields are allowed in both headers and meta-data, but they are
always
+ * stored in NBO. This is why the few instructions that accept a big field
+ * operand require that the other operand, in case it is a small operand, be
+ * stored in NBO as well, i.e. the small operand must be a header field
+ * (i.e. meta-data field not allowed in this case).
+ *
+ * Notation conventions:
+ * -Header or meta-data big field: HM-NBO.
*/
enum instruction_type {
@@ -333,6 +347,17 @@ enum instruction_type {
INSTR_MOV_128_32, /* dst and src in NBO format, size(dst) = 128 bits,
size(src) = 32 b. */
INSTR_MOV_I, /* dst = HMEF, src = I; size(dst) <= 64 bits. */
+ /* movh dst src
+ * Read/write the upper half (i.e. bits 127 .. 64) of a 128-bit field
into/from a 64-bit
+ * header field:
+ *
+ * dst64 = src128[127:64], where: dst64 = H, src128 = HM-NBO.
+ * dst128[127:64] = src64, where: dst128 = HM-NBO, src64 = H.
+ *
+ * Typically required for operations involving IPv6 addresses.
+ */
+ INSTR_MOVH,
+
/* dma h.header t.field
* memcpy(h.header, t.field, sizeof(h.header))
*/
@@ -2686,6 +2711,25 @@ __instr_mov_i_exec(struct rte_swx_pipeline *p
__rte_unused,
MOV_I(t, ip);
}
+/*
+ * movh.
+ */
+static inline void
+__instr_movh_exec(struct rte_swx_pipeline *p __rte_unused,
+ struct thread *t,
+ const struct instruction *ip)
+{
+ uint8_t *dst = t->structs[ip->mov.dst.struct_id] + ip->mov.dst.offset;
+ uint8_t *src = t->structs[ip->mov.src.struct_id] + ip->mov.src.offset;
+
+ uint64_t *dst64 = (uint64_t *)dst;
+ uint64_t *src64 = (uint64_t *)src;
+
+ TRACE("[Thread %2u] movh\n", p->thread_id);
+
+ dst64[0] = src64[0];
+}
+
/*
* dma.
*/
--
2.34.1
