/* Executes a new request. A retried request never reach that function (send
* and writes are discarded, and reads and atomics are retried elsewhere.
*/
static enum resp_states execute(struct rxe_qp *qp, struct rxe_pkt_info *pkt)
{
enum resp_states err;
if (pkt->mask & RXE_SEND_MASK) {
if (qp_type(qp) == IB_QPT_UD ||
qp_type(qp) == IB_QPT_SMI ||
qp_type(qp) == IB_QPT_GSI) {
union rdma_network_hdr hdr;
struct sk_buff *skb = PKT_TO_SKB(pkt);
memset(&hdr, 0, sizeof(hdr));
if (skb->protocol == htons(ETH_P_IP))
memcpy(&hdr.roce4grh, ip_hdr(skb), sizeof(hdr.roce4grh));
else if (skb->protocol == htons(ETH_P_IPV6))
memcpy(&hdr.ibgrh, ipv6_hdr(skb), sizeof(hdr.ibgrh));
err = send_data_in(qp, &hdr, sizeof(hdr));
if (err)
return err;
}
err = send_data_in(qp, payload_addr(pkt), payload_size(pkt));
if (err)
return err;
} else if (pkt->mask & RXE_WRITE_MASK) {
err = write_data_in(qp, pkt);
if (err)
return err;
} else if (pkt->mask & RXE_READ_MASK) {
/* For RDMA Read we can increment the msn now. See C9-148. */
qp->resp.msn++;
return RESPST_READ_REPLY;
} else if (pkt->mask & RXE_ATOMIC_MASK) {
err = process_atomic(qp, pkt);
if (err)
return err;
} else
/* Unreachable */
WARN_ON(1);
/* We successfully processed this new request. */
qp->resp.msn++;
/* next expected psn, read handles this separately */
qp->resp.psn = (pkt->psn + 1) & BTH_PSN_MASK;
qp->resp.opcode = pkt->opcode;
qp->resp.status = IB_WC_SUCCESS;
if (pkt->mask & RXE_COMP_MASK)
return RESPST_COMPLETE;
else if (qp_type(qp) == IB_QPT_RC)
return RESPST_ACKNOWLEDGE;
else
return RESPST_CLEANUP;
}
static void build_rdma_network_hdr(union rdma_network_hdr *hdr,
struct rxe_pkt_info *pkt)
{
struct sk_buff *skb = PKT_TO_SKB(pkt);
memset(hdr, 0, sizeof(*hdr));
if (skb->protocol == htons(ETH_P_IP))
memcpy(&hdr->roce4grh, ip_hdr(skb), sizeof(hdr->roce4grh));
else if (skb->protocol == htons(ETH_P_IPV6))
memcpy(&hdr->ibgrh, ipv6_hdr(skb), sizeof(hdr->ibgrh));
}
static enum resp_states do_complete(struct rxe_qp *qp,
struct rxe_pkt_info *pkt)
{
struct rxe_cqe cqe;
struct ib_wc *wc = &cqe.ibwc;
struct ib_uverbs_wc *uwc = &cqe.uibwc;
struct rxe_recv_wqe *wqe = qp->resp.wqe;
struct rxe_dev *rxe = to_rdev(qp->ibqp.device);
if (unlikely(!wqe))
return RESPST_CLEANUP;
memset(&cqe, 0, sizeof(cqe));
if (qp->rcq->is_user) {
uwc->status = qp->resp.status;
uwc->qp_num = qp->ibqp.qp_num;
uwc->wr_id = wqe->wr_id;
} else {
wc->status = qp->resp.status;
wc->qp = &qp->ibqp;
wc->wr_id = wqe->wr_id;
}
if (wc->status == IB_WC_SUCCESS) {
rxe_counter_inc(rxe, RXE_CNT_RDMA_RECV);
wc->opcode = (pkt->mask & RXE_IMMDT_MASK &&
pkt->mask & RXE_WRITE_MASK) ?
IB_WC_RECV_RDMA_WITH_IMM : IB_WC_RECV;
wc->vendor_err = 0;
wc->byte_len = wqe->dma.length - wqe->dma.resid;
/* fields after byte_len are different between kernel and user
* space
*/
if (qp->rcq->is_user) {
uwc->wc_flags = IB_WC_GRH;
if (pkt->mask & RXE_IMMDT_MASK) {
uwc->wc_flags |= IB_WC_WITH_IMM;
uwc->ex.imm_data = immdt_imm(pkt);
}
if (pkt->mask & RXE_IETH_MASK) {
uwc->wc_flags |= IB_WC_WITH_INVALIDATE;
uwc->ex.invalidate_rkey = ieth_rkey(pkt);
}
uwc->qp_num = qp->ibqp.qp_num;
if (pkt->mask & RXE_DETH_MASK)
uwc->src_qp = deth_sqp(pkt);
uwc->port_num = qp->attr.port_num;
} else {
struct sk_buff *skb = PKT_TO_SKB(pkt);
wc->wc_flags = IB_WC_GRH | IB_WC_WITH_NETWORK_HDR_TYPE;
if (skb->protocol == htons(ETH_P_IP))
wc->network_hdr_type = RDMA_NETWORK_IPV4;
else
wc->network_hdr_type = RDMA_NETWORK_IPV6;
if (is_vlan_dev(skb->dev)) {
wc->wc_flags |= IB_WC_WITH_VLAN;
wc->vlan_id = vlan_dev_vlan_id(skb->dev);
}
if (pkt->mask & RXE_IMMDT_MASK) {
wc->wc_flags |= IB_WC_WITH_IMM;
wc->ex.imm_data = immdt_imm(pkt);
}
if (pkt->mask & RXE_IETH_MASK) {
struct rxe_mem *rmr;
wc->wc_flags |= IB_WC_WITH_INVALIDATE;
wc->ex.invalidate_rkey = ieth_rkey(pkt);
rmr = rxe_pool_get_index(&rxe->mr_pool,
wc->ex.invalidate_rkey >> 8);
if (unlikely(!rmr)) {
pr_err("Bad rkey %#x invalidation\n",
wc->ex.invalidate_rkey);
return RESPST_ERROR;
}
rmr->state = RXE_MEM_STATE_FREE;
rxe_drop_ref(rmr);
}
wc->qp = &qp->ibqp;
if (pkt->mask & RXE_DETH_MASK)
wc->src_qp = deth_sqp(pkt);
wc->port_num = qp->attr.port_num;
}
}
