X-Git-Url: https://gerrit.o-ran-sc.org/r/gitweb?p=o-du%2Fphy.git;a=blobdiff_plain;f=fhi_lib%2Flib%2Fsrc%2Fxran_app_frag.c;fp=fhi_lib%2Flib%2Fsrc%2Fxran_app_frag.c;h=5b1dc47dd2d4071cd6c7a267f0bff8be42fa3eb7;hp=0000000000000000000000000000000000000000;hb=cef07f74965b1749dd909fc1322e211489fea2ea;hpb=bc60e3a69129edf1c21a01683f84a77483f6e3cc diff --git a/fhi_lib/lib/src/xran_app_frag.c b/fhi_lib/lib/src/xran_app_frag.c new file mode 100644 index 0000000..5b1dc47 --- /dev/null +++ b/fhi_lib/lib/src/xran_app_frag.c @@ -0,0 +1,259 @@ +/****************************************************************************** +* +* Copyright (c) 2019 Intel. +* +* Licensed under the Apache License, Version 2.0 (the "License"); +* you may not use this file except in compliance with the License. +* You may obtain a copy of the License at +* +* http://www.apache.org/licenses/LICENSE-2.0 +* +* Unless required by applicable law or agreed to in writing, software +* distributed under the License is distributed on an "AS IS" BASIS, +* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +* See the License for the specific language governing permissions and +* limitations under the License. +* +*******************************************************************************/ + + +/** + * @brief xRAN application frgamentation for U-plane packets + * + * @file xran_app_frag.c + * @ingroup group_source_xran + * @author Intel Corporation + **/ + +#include +#include +#include + +#include +#include +#include +#include + +#include "xran_app_frag.h" +#include "xran_cp_api.h" +#include "xran_pkt_up.h" +#include "xran_printf.h" +#include "xran_common.h" + +/* Fragment alignment */ +#define XRAN_PAYLOAD_RB_ALIGN (N_SC_PER_PRB*(IQ_BITS/8)*2) /**< at least 12*4=48 bytes per one RB */ + +static inline void __fill_xranhdr_frag(struct xran_up_pkt_hdr *dst, + const struct xran_up_pkt_hdr *src, uint16_t rblen_bytes, + uint16_t rboff_bytes, struct xran_section_info *sectinfo, uint32_t mf, uint8_t *seqid) +{ + struct data_section_hdr loc_data_sec_hdr; + struct xran_ecpri_hdr loc_ecpri_hdr; + + rte_memcpy(dst, src, sizeof(*dst)); + + if(dst->ecpri_hdr.ecpri_seq_id.seq_id != *seqid - 1){ + /* not first fragment, incease seq id */ + dst->ecpri_hdr.ecpri_seq_id.seq_id = *seqid++; + } + + loc_data_sec_hdr.fields.all_bits = rte_be_to_cpu_32(dst->data_sec_hdr.fields.all_bits); + + /* update RBs */ + loc_data_sec_hdr.fields.start_prbu = sectinfo->startPrbc + rboff_bytes/(N_SC_PER_PRB*(IQ_BITS/8*2)); + loc_data_sec_hdr.fields.num_prbu = rblen_bytes/(N_SC_PER_PRB*(IQ_BITS/8*2)); + + print_dbg("sec [%d %d] pkt [%d %d] rboff_bytes %d rblen_bytes %d\n",sectinfo->startPrbc, sectinfo->numPrbc, loc_data_sec_hdr.fields.start_prbu, loc_data_sec_hdr.fields.num_prbu, + rboff_bytes, rblen_bytes); + + dst->data_sec_hdr.fields.all_bits = rte_cpu_to_be_32(loc_data_sec_hdr.fields.all_bits); + + /* update length */ + dst->ecpri_hdr.cmnhdr.ecpri_payl_size = rte_cpu_to_be_16(sizeof(struct radio_app_common_hdr) + + sizeof(struct data_section_hdr) + rblen_bytes + xran_get_ecpri_hdr_size()); +} + + +static inline void __free_fragments(struct rte_mbuf *mb[], uint32_t num) +{ + uint32_t i; + for (i = 0; i != num; i++) + rte_pktmbuf_free(mb[i]); +} + +/** + * XRAN fragmentation. + * + * This function implements the application fragmentation of XRAN packets. + * + * @param pkt_in + * The input packet. + * @param pkts_out + * Array storing the output fragments. + * @param mtu_size + * Size in bytes of the Maximum Transfer Unit (MTU) for the outgoing XRAN + * datagrams. This value includes the size of the XRAN headers. + * @param pool_direct + * MBUF pool used for allocating direct buffers for the output fragments. + * @param pool_indirect + * MBUF pool used for allocating indirect buffers for the output fragments. + * @return + * Upon successful completion - number of output fragments placed + * in the pkts_out array. + * Otherwise - (-1) * . + */ +int32_t +xran_app_fragment_packet(struct rte_mbuf *pkt_in, /* eth hdr is prepended */ + struct rte_mbuf **pkts_out, + uint16_t nb_pkts_out, + uint16_t mtu_size, + struct rte_mempool *pool_direct, + struct rte_mempool *pool_indirect, + struct xran_section_info *sectinfo, + uint8_t *seqid) +{ + struct rte_mbuf *in_seg = NULL; + uint32_t out_pkt_pos = 0, in_seg_data_pos = 0; + uint32_t more_in_segs; + uint16_t fragment_offset, frag_size; + uint16_t frag_bytes_remaining; + struct eth_xran_up_pkt_hdr *in_hdr; + struct xran_up_pkt_hdr *in_hdr_xran; + + /* + * Ensure the XRAN payload length of all fragments is aligned to a + * multiple of 48 bytes (1 RB with IQ of 16 bits each) + */ + frag_size = ((mtu_size - sizeof(struct eth_xran_up_pkt_hdr) - RTE_PKTMBUF_HEADROOM)/XRAN_PAYLOAD_RB_ALIGN)*XRAN_PAYLOAD_RB_ALIGN; + + + print_dbg("frag_size %d\n",frag_size); + + in_hdr = rte_pktmbuf_mtod(pkt_in, struct eth_xran_up_pkt_hdr *); + + in_hdr_xran = &in_hdr->xran_hdr; + + /* Check that pkts_out is big enough to hold all fragments */ + if (unlikely(frag_size * nb_pkts_out < + (uint16_t)(pkt_in->pkt_len - sizeof (struct xran_up_pkt_hdr)))){ + print_err("-EINVAL\n"); + return -EINVAL; + } + + in_seg = pkt_in; + in_seg_data_pos = sizeof(struct eth_xran_up_pkt_hdr); + out_pkt_pos = 0; + fragment_offset = 0; + + more_in_segs = 1; + while (likely(more_in_segs)) { + struct rte_mbuf *out_pkt = NULL, *out_seg_prev = NULL; + uint32_t more_out_segs; + struct xran_up_pkt_hdr *out_hdr; + + /* Allocate direct buffer */ + out_pkt = rte_pktmbuf_alloc(pool_direct); + if (unlikely(out_pkt == NULL)) { + print_err("pool_direct -ENOMEM\n"); + __free_fragments(pkts_out, out_pkt_pos); + return -ENOMEM; + } + + print_dbg("[%d] out_pkt %p\n",more_in_segs, out_pkt); + + /* Reserve space for the XRAN header that will be built later */ + //out_pkt->data_len = sizeof(struct xran_up_pkt_hdr); + //out_pkt->pkt_len = sizeof(struct xran_up_pkt_hdr); + if(rte_pktmbuf_append(out_pkt, sizeof(struct xran_up_pkt_hdr)) ==NULL){ + rte_panic("sizeof(struct xran_up_pkt_hdr)"); + } + frag_bytes_remaining = frag_size; + + out_seg_prev = out_pkt; + more_out_segs = 1; + while (likely(more_out_segs && more_in_segs)) { + uint32_t len; +#ifdef XRAN_ATTACH_MBUF + struct rte_mbuf *out_seg = NULL; + + /* Allocate indirect buffer */ + print_dbg("Allocate indirect buffer \n"); + out_seg = rte_pktmbuf_alloc(pool_indirect); + if (unlikely(out_seg == NULL)) { + print_err("pool_indirect -ENOMEM\n"); + rte_pktmbuf_free(out_pkt); + __free_fragments(pkts_out, out_pkt_pos); + return -ENOMEM; + } + + print_dbg("[%d %d] out_seg %p\n",more_out_segs, more_in_segs, out_seg); + out_seg_prev->next = out_seg; + out_seg_prev = out_seg; + + /* Prepare indirect buffer */ + rte_pktmbuf_attach(out_seg, in_seg); +#endif + len = frag_bytes_remaining; + if (len > (in_seg->data_len - in_seg_data_pos)) { + len = in_seg->data_len - in_seg_data_pos; + } +#ifdef XRAN_ATTACH_MBUF + out_seg->data_off = in_seg->data_off + in_seg_data_pos; + out_seg->data_len = (uint16_t)len; + out_pkt->pkt_len = (uint16_t)(len + + out_pkt->pkt_len); + out_pkt->nb_segs += 1; +#else +{ + char* pChar = rte_pktmbuf_mtod(in_seg, char*); + void *iq_src = (pChar + in_seg_data_pos); + void *iq_dst = rte_pktmbuf_append(out_pkt, len); + + print_dbg("rte_pktmbuf_attach\n"); + if(iq_src && iq_dst) + rte_memcpy(iq_dst, iq_src, len); + else + print_err("iq_src %p iq_dst %p\n len %d room %d\n", iq_src, iq_dst, len, rte_pktmbuf_tailroom(out_pkt)); +} +#endif + in_seg_data_pos += len; + frag_bytes_remaining -= len; + + /* Current output packet (i.e. fragment) done ? */ + if (unlikely(frag_bytes_remaining == 0)) + more_out_segs = 0; + + /* Current input segment done ? */ + if (unlikely(in_seg_data_pos == in_seg->data_len)) { + in_seg = in_seg->next; + in_seg_data_pos = 0; + + if (unlikely(in_seg == NULL)) + more_in_segs = 0; + } + } + + /* Build the XRAN header */ + print_dbg("Build the XRAN header\n"); + out_hdr = rte_pktmbuf_mtod(out_pkt, struct xran_up_pkt_hdr *); + + __fill_xranhdr_frag(out_hdr, in_hdr_xran, + (uint16_t)out_pkt->pkt_len - sizeof(struct xran_up_pkt_hdr), + fragment_offset, sectinfo, more_in_segs, seqid); + + fragment_offset = (uint16_t)(fragment_offset + + out_pkt->pkt_len - sizeof(struct xran_up_pkt_hdr)); + + //out_pkt->l3_len = sizeof(struct xran_up_pkt_hdr); + + /* Write the fragment to the output list */ + pkts_out[out_pkt_pos] = out_pkt; + print_dbg("out_pkt_pos %d data_len %d pkt_len %d\n", out_pkt_pos, out_pkt->data_len, out_pkt->pkt_len); + out_pkt_pos ++; + //rte_pktmbuf_dump(stdout, out_pkt, 96); + } + + return out_pkt_pos; +} + +