baseband/turbo_sw: support large size code block

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: Nicolas Chautru <nicolas.chautru@intel.com>
Acked-by: Dave Burley <dave.burley@accelercomm.com>
Acked-by: Akhil Goyal <akhil.goyal@nxp.com>

diff --git a/app/test-bbdev/test_bbdev_perf.c b/app/test-bbdev/test_bbdev_perf.c
index d8db58e..e998d0b 100644 (file)
--- a/app/test-bbdev/test_bbdev_perf.c
+++ b/app/test-bbdev/test_bbdev_perf.c
@@ -764,6 +764,7 @@ init_op_data_objs(struct rte_bbdev_op_data *bufs,
 {
        int ret;
        unsigned int i, j;
+       bool large_input = false;
 
        for (i = 0; i < n; ++i) {
                char *data;
@@ -774,24 +775,41 @@ init_op_data_objs(struct rte_bbdev_op_data *bufs,
                                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 1dfcfcc..c9b243c 100644 (file)
--- a/doc/guides/rel_notes/release_20_05.rst
+++ b/doc/guides/rel_notes/release_20_05.rst
@@ -62,6 +62,10 @@ New Features
 
   * Added support for matching on IPv4 Time To Live and IPv6 Hop Limit.
 
+* **Updated the turbo_sw bbdev PMD.**
+
+  Supported large size code blocks which does not fit in one mbuf segment.
+
 * **Added event mode to ipsec-secgw application.**
 
   Updated ipsec-secgw application to add event based packet processing. The worker

diff --git a/drivers/baseband/turbo_sw/bbdev_turbo_software.c b/drivers/baseband/turbo_sw/bbdev_turbo_software.c
index 5ca8ca1..bb62276 100644 (file)
--- a/drivers/baseband/turbo_sw/bbdev_turbo_software.c
+++ b/drivers/baseband/turbo_sw/bbdev_turbo_software.c
@@ -1335,7 +1335,7 @@ process_dec_cb(struct turbo_sw_queue *q, struct rte_bbdev_dec_op *op,
 
 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 @@ enqueue_ldpc_dec_one_op(struct turbo_sw_queue *q, struct rte_bbdev_dec_op *op,
                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 @@ enqueue_ldpc_dec_one_op(struct turbo_sw_queue *q, struct rte_bbdev_dec_op *op,
                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 (file)
--- a/lib/librte_bbdev/rte_bbdev_op.h
+++ b/lib/librte_bbdev/rte_bbdev_op.h
@@ -35,7 +35,8 @@ extern "C" {
 #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 */