diff options
| -rw-r--r-- | drivers/net/ethernet/qlogic/qed/qed_iwarp.c | 193 | ||||
| -rw-r--r-- | drivers/net/ethernet/qlogic/qed/qed_iwarp.h | 1 |
2 files changed, 194 insertions, 0 deletions
diff --git a/drivers/net/ethernet/qlogic/qed/qed_iwarp.c b/drivers/net/ethernet/qlogic/qed/qed_iwarp.c index 299494225f44..b2b1f87864ef 100644 --- a/drivers/net/ethernet/qlogic/qed/qed_iwarp.c +++ b/drivers/net/ethernet/qlogic/qed/qed_iwarp.c @@ -1420,6 +1420,7 @@ void qed_iwarp_resc_free(struct qed_hwfn *p_hwfn) qed_rdma_bmap_free(p_hwfn, &p_hwfn->p_rdma_info->tcp_cid_map, 1); kfree(iwarp_info->mpa_bufs); kfree(iwarp_info->partial_fpdus); + kfree(iwarp_info->mpa_intermediate_buf); } int qed_iwarp_accept(void *rdma_cxt, struct qed_iwarp_accept_in *iparams) @@ -1762,6 +1763,11 @@ char *pkt_type_str[] = { "QED_IWARP_MPA_PKT_UNALIGNED" }; +static int +qed_iwarp_recycle_pkt(struct qed_hwfn *p_hwfn, + struct qed_iwarp_fpdu *fpdu, + struct qed_iwarp_ll2_buff *buf); + static enum qed_iwarp_mpa_pkt_type qed_iwarp_mpa_classify(struct qed_hwfn *p_hwfn, struct qed_iwarp_fpdu *fpdu, @@ -1822,6 +1828,68 @@ qed_iwarp_init_fpdu(struct qed_iwarp_ll2_buff *buf, fpdu->mpa_frag_len = fpdu->fpdu_length - fpdu->incomplete_bytes; } +static int +qed_iwarp_cp_pkt(struct qed_hwfn *p_hwfn, + struct qed_iwarp_fpdu *fpdu, + struct unaligned_opaque_data *pkt_data, + struct qed_iwarp_ll2_buff *buf, u16 tcp_payload_size) +{ + u8 *tmp_buf = p_hwfn->p_rdma_info->iwarp.mpa_intermediate_buf; + int rc; + + /* need to copy the data from the partial packet stored in fpdu + * to the new buf, for this we also need to move the data currently + * placed on the buf. The assumption is that the buffer is big enough + * since fpdu_length <= mss, we use an intermediate buffer since + * we may need to copy the new data to an overlapping location + */ + if ((fpdu->mpa_frag_len + tcp_payload_size) > (u16)buf->buff_size) { + DP_ERR(p_hwfn, + "MPA ALIGN: Unexpected: buffer is not large enough for split fpdu buff_size = %d mpa_frag_len = %d, tcp_payload_size = %d, incomplete_bytes = %d\n", + buf->buff_size, fpdu->mpa_frag_len, + tcp_payload_size, fpdu->incomplete_bytes); + return -EINVAL; + } + + DP_VERBOSE(p_hwfn, QED_MSG_RDMA, + "MPA ALIGN Copying fpdu: [%p, %d] [%p, %d]\n", + fpdu->mpa_frag_virt, fpdu->mpa_frag_len, + (u8 *)(buf->data) + pkt_data->first_mpa_offset, + tcp_payload_size); + + memcpy(tmp_buf, fpdu->mpa_frag_virt, fpdu->mpa_frag_len); + memcpy(tmp_buf + fpdu->mpa_frag_len, + (u8 *)(buf->data) + pkt_data->first_mpa_offset, + tcp_payload_size); + + rc = qed_iwarp_recycle_pkt(p_hwfn, fpdu, fpdu->mpa_buf); + if (rc) + return rc; + + /* If we managed to post the buffer copy the data to the new buffer + * o/w this will occur in the next round... + */ + memcpy((u8 *)(buf->data), tmp_buf, + fpdu->mpa_frag_len + tcp_payload_size); + + fpdu->mpa_buf = buf; + /* fpdu->pkt_hdr remains as is */ + /* fpdu->mpa_frag is overridden with new buf */ + fpdu->mpa_frag = buf->data_phys_addr; + fpdu->mpa_frag_virt = buf->data; + fpdu->mpa_frag_len += tcp_payload_size; + + fpdu->incomplete_bytes -= tcp_payload_size; + + DP_VERBOSE(p_hwfn, + QED_MSG_RDMA, + "MPA ALIGN: split fpdu buff_size = %d mpa_frag_len = %d, tcp_payload_size = %d, incomplete_bytes = %d\n", + buf->buff_size, fpdu->mpa_frag_len, tcp_payload_size, + fpdu->incomplete_bytes); + + return 0; +} + static void qed_iwarp_update_fpdu_length(struct qed_hwfn *p_hwfn, struct qed_iwarp_fpdu *fpdu, u8 *mpa_data) @@ -1843,6 +1911,90 @@ qed_iwarp_update_fpdu_length(struct qed_hwfn *p_hwfn, } } +#define QED_IWARP_IS_RIGHT_EDGE(_curr_pkt) \ + (GET_FIELD((_curr_pkt)->flags, \ + UNALIGNED_OPAQUE_DATA_PKT_REACHED_WIN_RIGHT_EDGE)) + +/* This function is used to recycle a buffer using the ll2 drop option. It + * uses the mechanism to ensure that all buffers posted to tx before this one + * were completed. The buffer sent here will be sent as a cookie in the tx + * completion function and can then be reposted to rx chain when done. The flow + * that requires this is the flow where a FPDU splits over more than 3 tcp + * segments. In this case the driver needs to re-post a rx buffer instead of + * the one received, but driver can't simply repost a buffer it copied from + * as there is a case where the buffer was originally a packed FPDU, and is + * partially posted to FW. Driver needs to ensure FW is done with it. + */ +static int +qed_iwarp_recycle_pkt(struct qed_hwfn *p_hwfn, + struct qed_iwarp_fpdu *fpdu, + struct qed_iwarp_ll2_buff *buf) +{ + struct qed_ll2_tx_pkt_info tx_pkt; + u8 ll2_handle; + int rc; + + memset(&tx_pkt, 0, sizeof(tx_pkt)); + tx_pkt.num_of_bds = 1; + tx_pkt.tx_dest = QED_LL2_TX_DEST_DROP; + tx_pkt.l4_hdr_offset_w = fpdu->pkt_hdr_size >> 2; + tx_pkt.first_frag = fpdu->pkt_hdr; + tx_pkt.first_frag_len = fpdu->pkt_hdr_size; + buf->piggy_buf = NULL; + tx_pkt.cookie = buf; + + ll2_handle = p_hwfn->p_rdma_info->iwarp.ll2_mpa_handle; + + rc = qed_ll2_prepare_tx_packet(p_hwfn, ll2_handle, &tx_pkt, true); + if (rc) + DP_VERBOSE(p_hwfn, QED_MSG_RDMA, + "Can't drop packet rc=%d\n", rc); + + DP_VERBOSE(p_hwfn, + QED_MSG_RDMA, + "MPA_ALIGN: send drop tx packet [%lx, 0x%x], buf=%p, rc=%d\n", + (unsigned long int)tx_pkt.first_frag, + tx_pkt.first_frag_len, buf, rc); + + return rc; +} + +static int +qed_iwarp_win_right_edge(struct qed_hwfn *p_hwfn, struct qed_iwarp_fpdu *fpdu) +{ + struct qed_ll2_tx_pkt_info tx_pkt; + u8 ll2_handle; + int rc; + + memset(&tx_pkt, 0, sizeof(tx_pkt)); + tx_pkt.num_of_bds = 1; + tx_pkt.tx_dest = QED_LL2_TX_DEST_LB; + tx_pkt.l4_hdr_offset_w = fpdu->pkt_hdr_size >> 2; + + tx_pkt.first_frag = fpdu->pkt_hdr; + tx_pkt.first_frag_len = fpdu->pkt_hdr_size; + tx_pkt.enable_ip_cksum = true; + tx_pkt.enable_l4_cksum = true; + tx_pkt.calc_ip_len = true; + /* vlan overload with enum iwarp_ll2_tx_queues */ + tx_pkt.vlan = IWARP_LL2_ALIGNED_RIGHT_TRIMMED_TX_QUEUE; + + ll2_handle = p_hwfn->p_rdma_info->iwarp.ll2_mpa_handle; + + rc = qed_ll2_prepare_tx_packet(p_hwfn, ll2_handle, &tx_pkt, true); + if (rc) + DP_VERBOSE(p_hwfn, QED_MSG_RDMA, + "Can't send right edge rc=%d\n", rc); + DP_VERBOSE(p_hwfn, + QED_MSG_RDMA, + "MPA_ALIGN: Sent right edge FPDU num_bds=%d [%lx, 0x%x], rc=%d\n", + tx_pkt.num_of_bds, + (unsigned long int)tx_pkt.first_frag, + tx_pkt.first_frag_len, rc); + + return rc; +} + static int qed_iwarp_send_fpdu(struct qed_hwfn *p_hwfn, struct qed_iwarp_fpdu *fpdu, @@ -1971,6 +2123,20 @@ qed_iwarp_process_mpa_pkt(struct qed_hwfn *p_hwfn, mpa_buf->tcp_payload_len, mpa_buf->placement_offset); + if (!QED_IWARP_IS_RIGHT_EDGE(curr_pkt)) { + mpa_buf->tcp_payload_len = 0; + break; + } + + rc = qed_iwarp_win_right_edge(p_hwfn, fpdu); + + if (rc) { + DP_VERBOSE(p_hwfn, QED_MSG_RDMA, + "Can't send FPDU:reset rc=%d\n", rc); + memset(fpdu, 0, sizeof(*fpdu)); + break; + } + mpa_buf->tcp_payload_len = 0; break; case QED_IWARP_MPA_PKT_PACKED: @@ -1994,6 +2160,28 @@ qed_iwarp_process_mpa_pkt(struct qed_hwfn *p_hwfn, break; case QED_IWARP_MPA_PKT_UNALIGNED: qed_iwarp_update_fpdu_length(p_hwfn, fpdu, mpa_data); + if (mpa_buf->tcp_payload_len < fpdu->incomplete_bytes) { + /* special handling of fpdu split over more + * than 2 segments + */ + if (QED_IWARP_IS_RIGHT_EDGE(curr_pkt)) { + rc = qed_iwarp_win_right_edge(p_hwfn, + fpdu); + /* packet will be re-processed later */ + if (rc) + return rc; + } + + rc = qed_iwarp_cp_pkt(p_hwfn, fpdu, curr_pkt, + buf, + mpa_buf->tcp_payload_len); + if (rc) /* packet will be re-processed later */ + return rc; + + mpa_buf->tcp_payload_len = 0; + break; + } + rc = qed_iwarp_send_fpdu(p_hwfn, fpdu, curr_pkt, buf, mpa_buf->tcp_payload_len, pkt_type); @@ -2510,6 +2698,11 @@ qed_iwarp_ll2_start(struct qed_hwfn *p_hwfn, goto err; iwarp_info->max_num_partial_fpdus = (u16)p_hwfn->p_rdma_info->num_qps; + + iwarp_info->mpa_intermediate_buf = kzalloc(mpa_buff_size, GFP_KERNEL); + if (!iwarp_info->mpa_intermediate_buf) + goto err; + /* The mpa_bufs array serves for pending RX packets received on the * mpa ll2 that don't have place on the tx ring and require later * processing. We can't fail on allocation of such a struct therefore diff --git a/drivers/net/ethernet/qlogic/qed/qed_iwarp.h b/drivers/net/ethernet/qlogic/qed/qed_iwarp.h index c58793a47774..c1ecd743305f 100644 --- a/drivers/net/ethernet/qlogic/qed/qed_iwarp.h +++ b/drivers/net/ethernet/qlogic/qed/qed_iwarp.h @@ -107,6 +107,7 @@ struct qed_iwarp_info { enum mpa_rtr_type rtr_type; struct qed_iwarp_fpdu *partial_fpdus; struct qed_iwarp_ll2_mpa_buf *mpa_bufs; + u8 *mpa_intermediate_buf; u16 max_num_partial_fpdus; }; |