From: Nic Chautru <nicolas.chau...@intel.com>
This is to support cases when the input data for
decoding a code block is larger than 64kB and would
not fit as a contiguous block of data into one
mbuf. In that case the length from the operation
supersedes the mbuf default structure.
Signed-off-by: Nic Chautru <nicolas.chau...@intel.com>
---
app/test-bbdev/test_bbdev_perf.c | 34 ++++++++++++++++++------
doc/guides/rel_notes/release_20_05.rst | 5 ++++
drivers/baseband/turbo_sw/bbdev_turbo_software.c | 13 +++++----
lib/librte_bbdev/rte_bbdev_op.h | 3 ++-
4 files changed, 41 insertions(+), 14 deletions(-)
diff --git a/app/test-bbdev/test_bbdev_perf.c b/app/test-bbdev/test_bbdev_perf.c
index d8db58e..e998d0b 100644
--- a/app/test-bbdev/test_bbdev_perf.c
+++ b/app/test-bbdev/test_bbdev_perf.c
@@ -764,6 +764,7 @@ typedef int (test_case_function)(struct active_device *ad,
{
int ret;
unsigned int i, j;
+ bool large_input = false;
for (i = 0; i < n; ++i) {
char *data;
@@ -774,24 +775,41 @@ typedef int (test_case_function)(struct active_device *ad,
op_type, n * ref_entries->nb_segments,
mbuf_pool->size);
- TEST_ASSERT_SUCCESS(((seg->length + RTE_PKTMBUF_HEADROOM) >
- (uint32_t)UINT16_MAX),
- "Given data is bigger than allowed mbuf segment
size");
-
+ if (seg->length > RTE_BBDEV_LDPC_E_MAX_MBUF) {
+ /*
+ * Special case when DPDK mbuf cannot handle
+ * the required input size
+ */
+ printf("Warning: Larger input size than DPDK mbuf %d\n",
+ seg->length);
+ large_input = true;
+ }
bufs[i].data = m_head;
bufs[i].offset = 0;
bufs[i].length = 0;
if ((op_type == DATA_INPUT) || (op_type == DATA_HARQ_INPUT)) {
- data = rte_pktmbuf_append(m_head, seg->length);
- TEST_ASSERT_NOT_NULL(data,
+ if ((op_type == DATA_INPUT) && large_input) {
+ /* Allocate a fake overused mbuf */
+ data = rte_malloc(NULL, seg->length, 0);
+ memcpy(data, seg->addr, seg->length);
+ m_head->buf_addr = data;
+ m_head->buf_iova = rte_malloc_virt2iova(data);
+ m_head->data_off = 0;
+ m_head->data_len = seg->length;
+ } else {
+ data = rte_pktmbuf_append(m_head, seg->length);
+ TEST_ASSERT_NOT_NULL(data,
"Couldn't append %u bytes to mbuf from %d
data type mbuf pool",
seg->length, op_type);
- TEST_ASSERT(data == RTE_PTR_ALIGN(data, min_alignment),
+ TEST_ASSERT(data == RTE_PTR_ALIGN(
+ data, min_alignment),
"Data addr in mbuf (%p) is not aligned to
device min alignment (%u)",
data, min_alignment);
- rte_memcpy(data, seg->addr, seg->length);
+ rte_memcpy(data, seg->addr, seg->length);
+ }
+
bufs[i].length += seg->length;
for (j = 1; j < ref_entries->nb_segments; ++j) {
diff --git a/doc/guides/rel_notes/release_20_05.rst
b/doc/guides/rel_notes/release_20_05.rst
index 2190eaf..8dc87fc 100644
--- a/doc/guides/rel_notes/release_20_05.rst
+++ b/doc/guides/rel_notes/release_20_05.rst
@@ -56,6 +56,11 @@ New Features
Also, make sure to start the actual text at the margin.
=========================================================
+* **Updated the TURBO_SW bbdev PMD.**
+
+ Updated the ``turbo_sw`` bbdev driver with changes including:
+
+ * Support for large size code block not fitting in one mbuf segment.
Removed Items
-------------
diff --git a/drivers/baseband/turbo_sw/bbdev_turbo_software.c
b/drivers/baseband/turbo_sw/bbdev_turbo_software.c
index 5ca8ca1..bb62276 100644
--- a/drivers/baseband/turbo_sw/bbdev_turbo_software.c
+++ b/drivers/baseband/turbo_sw/bbdev_turbo_software.c
@@ -1335,7 +1335,7 @@ struct turbo_sw_queue {
static inline void
process_ldpc_dec_cb(struct turbo_sw_queue *q, struct rte_bbdev_dec_op *op,
- uint8_t c, uint16_t out_length, uint16_t e,
+ uint8_t c, uint16_t out_length, uint32_t e,
struct rte_mbuf *m_in,
struct rte_mbuf *m_out_head, struct rte_mbuf *m_out,
struct rte_mbuf *m_harq_in,
@@ -1617,8 +1617,8 @@ struct turbo_sw_queue {
struct rte_bbdev_stats *queue_stats)
{
uint8_t c, r = 0;
- uint16_t e, out_length;
- uint16_t crc24_overlap = 0;
+ uint32_t e;
+ uint16_t out_length, crc24_overlap = 0;
struct rte_bbdev_op_ldpc_dec *dec = &op->ldpc_dec;
struct rte_mbuf *m_in = dec->input.data;
struct rte_mbuf *m_harq_in = dec->harq_combined_input.data;
@@ -1660,8 +1660,11 @@ struct turbo_sw_queue {
if (dec->code_block_mode == 0)
e = (r < dec->tb_params.cab) ?
dec->tb_params.ea : dec->tb_params.eb;
-
- seg_total_left = rte_pktmbuf_data_len(m_in) - in_offset;
+ /* Special case handling when overusing mbuf */
+ if (e < RTE_BBDEV_LDPC_E_MAX_MBUF)
+ seg_total_left = rte_pktmbuf_data_len(m_in) - in_offset;
+ else
+ seg_total_left = e;
process_ldpc_dec_cb(q, op, c, out_length, e,
m_in, m_out_head, m_out,
diff --git a/lib/librte_bbdev/rte_bbdev_op.h b/lib/librte_bbdev/rte_bbdev_op.h
index 80f3934..9c66721 100644
--- a/lib/librte_bbdev/rte_bbdev_op.h
+++ b/lib/librte_bbdev/rte_bbdev_op.h
@@ -35,7 +35,8 @@
#define RTE_BBDEV_LDPC_MAX_CB_SIZE (8448)
/* Minimum size of Code Block */
#define RTE_BBDEV_LDPC_MIN_CB_SIZE (40)
-
+/* Maximum E size we can manage with default mbuf */
+#define RTE_BBDEV_LDPC_E_MAX_MBUF (64000)
/* Minimum size of Code Block (36.212, Table 5.1.3-3) */
#define RTE_BBDEV_TURBO_MIN_CB_SIZE (40)
/* Maximum size of circular buffer */
