X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=drivers%2Finfiniband%2Fhw%2Fipath%2Fipath_uc.c;h=e636cfd67a821f74349c48d1f64f80d3bc9e94ab;hb=refs%2Fheads%2Fvserver;hp=0d6dbc0a541e399dd4ae64deef480efa46cc5d01;hpb=16cf0ec7408f389279d413869e94c1a351392f97;p=linux-2.6.git diff --git a/drivers/infiniband/hw/ipath/ipath_uc.c b/drivers/infiniband/hw/ipath/ipath_uc.c index 0d6dbc0a5..e636cfd67 100644 --- a/drivers/infiniband/hw/ipath/ipath_uc.c +++ b/drivers/infiniband/hw/ipath/ipath_uc.c @@ -1,4 +1,5 @@ /* + * Copyright (c) 2006 QLogic, Inc. All rights reserved. * Copyright (c) 2005, 2006 PathScale, Inc. All rights reserved. * * This software is available to you under a choice of one of two @@ -31,7 +32,7 @@ */ #include "ipath_verbs.h" -#include "ips_common.h" +#include "ipath_kernel.h" /* cut down ridiculously long IB macro names */ #define OP(x) IB_OPCODE_UC_##x @@ -61,90 +62,40 @@ static void complete_last_send(struct ipath_qp *qp, struct ipath_swqe *wqe, } /** - * ipath_do_uc_send - do a send on a UC queue - * @data: contains a pointer to the QP to send on + * ipath_make_uc_req - construct a request packet (SEND, RDMA write) + * @qp: a pointer to the QP + * @ohdr: a pointer to the IB header being constructed + * @pmtu: the path MTU + * @bth0p: pointer to the BTH opcode word + * @bth2p: pointer to the BTH PSN word * - * Process entries in the send work queue until the queue is exhausted. - * Only allow one CPU to send a packet per QP (tasklet). - * Otherwise, after we drop the QP lock, two threads could send - * packets out of order. - * This is similar to ipath_do_rc_send() below except we don't have - * timeouts or resends. + * Return 1 if constructed; otherwise, return 0. + * Note the QP s_lock must be held and interrupts disabled. */ -void ipath_do_uc_send(unsigned long data) +int ipath_make_uc_req(struct ipath_qp *qp, + struct ipath_other_headers *ohdr, + u32 pmtu, u32 *bth0p, u32 *bth2p) { - struct ipath_qp *qp = (struct ipath_qp *)data; - struct ipath_ibdev *dev = to_idev(qp->ibqp.device); struct ipath_swqe *wqe; - unsigned long flags; - u16 lrh0; u32 hwords; - u32 nwords; - u32 extra_bytes; u32 bth0; - u32 bth2; - u32 pmtu = ib_mtu_enum_to_int(qp->path_mtu); u32 len; - struct ipath_other_headers *ohdr; struct ib_wc wc; - if (test_and_set_bit(IPATH_S_BUSY, &qp->s_flags)) - goto bail; - - if (unlikely(qp->remote_ah_attr.dlid == - ipath_layer_get_lid(dev->dd))) { - /* Pass in an uninitialized ib_wc to save stack space. */ - ipath_ruc_loopback(qp, &wc); - clear_bit(IPATH_S_BUSY, &qp->s_flags); - goto bail; - } - - ohdr = &qp->s_hdr.u.oth; - if (qp->remote_ah_attr.ah_flags & IB_AH_GRH) - ohdr = &qp->s_hdr.u.l.oth; - -again: - /* Check for a constructed packet to be sent. */ - if (qp->s_hdrwords != 0) { - /* - * If no PIO bufs are available, return. - * An interrupt will call ipath_ib_piobufavail() - * when one is available. - */ - if (ipath_verbs_send(dev->dd, qp->s_hdrwords, - (u32 *) &qp->s_hdr, - qp->s_cur_size, - qp->s_cur_sge)) { - ipath_no_bufs_available(qp, dev); - goto bail; - } - dev->n_unicast_xmit++; - /* Record that we sent the packet and s_hdr is empty. */ - qp->s_hdrwords = 0; - } - - lrh0 = IPS_LRH_BTH; - /* header size in 32-bit words LRH+BTH = (8+12)/4. */ - hwords = 5; - - /* - * The lock is needed to synchronize between - * setting qp->s_ack_state and post_send(). - */ - spin_lock_irqsave(&qp->s_lock, flags); - if (!(ib_ipath_state_ops[qp->state] & IPATH_PROCESS_SEND_OK)) goto done; - bth0 = ipath_layer_get_pkey(dev->dd, qp->s_pkey_index); + /* header size in 32-bit words LRH+BTH = (8+12)/4. */ + hwords = 5; + bth0 = 0; - /* Send a request. */ + /* Get the next send request. */ wqe = get_swqe_ptr(qp, qp->s_last); switch (qp->s_state) { default: /* - * Signal the completion of the last send (if there is - * one). + * Signal the completion of the last send + * (if there is one). */ if (qp->s_last != qp->s_tail) complete_last_send(qp, wqe, &wc); @@ -257,61 +208,16 @@ again: } break; } - bth2 = qp->s_next_psn++ & IPS_PSN_MASK; qp->s_len -= len; - bth0 |= qp->s_state << 24; - - spin_unlock_irqrestore(&qp->s_lock, flags); - - /* Construct the header. */ - extra_bytes = (4 - len) & 3; - nwords = (len + extra_bytes) >> 2; - if (unlikely(qp->remote_ah_attr.ah_flags & IB_AH_GRH)) { - /* Header size in 32-bit words. */ - hwords += 10; - lrh0 = IPS_LRH_GRH; - qp->s_hdr.u.l.grh.version_tclass_flow = - cpu_to_be32((6 << 28) | - (qp->remote_ah_attr.grh.traffic_class - << 20) | - qp->remote_ah_attr.grh.flow_label); - qp->s_hdr.u.l.grh.paylen = - cpu_to_be16(((hwords - 12) + nwords + - SIZE_OF_CRC) << 2); - /* next_hdr is defined by C8-7 in ch. 8.4.1 */ - qp->s_hdr.u.l.grh.next_hdr = 0x1B; - qp->s_hdr.u.l.grh.hop_limit = - qp->remote_ah_attr.grh.hop_limit; - /* The SGID is 32-bit aligned. */ - qp->s_hdr.u.l.grh.sgid.global.subnet_prefix = - dev->gid_prefix; - qp->s_hdr.u.l.grh.sgid.global.interface_id = - ipath_layer_get_guid(dev->dd); - qp->s_hdr.u.l.grh.dgid = qp->remote_ah_attr.grh.dgid; - } qp->s_hdrwords = hwords; qp->s_cur_sge = &qp->s_sge; qp->s_cur_size = len; - lrh0 |= qp->remote_ah_attr.sl << 4; - qp->s_hdr.lrh[0] = cpu_to_be16(lrh0); - /* DEST LID */ - qp->s_hdr.lrh[1] = cpu_to_be16(qp->remote_ah_attr.dlid); - qp->s_hdr.lrh[2] = cpu_to_be16(hwords + nwords + SIZE_OF_CRC); - qp->s_hdr.lrh[3] = cpu_to_be16(ipath_layer_get_lid(dev->dd)); - bth0 |= extra_bytes << 20; - ohdr->bth[0] = cpu_to_be32(bth0); - ohdr->bth[1] = cpu_to_be32(qp->remote_qpn); - ohdr->bth[2] = cpu_to_be32(bth2); - - /* Check for more work to do. */ - goto again; + *bth0p = bth0 | (qp->s_state << 24); + *bth2p = qp->s_next_psn++ & IPATH_PSN_MASK; + return 1; done: - spin_unlock_irqrestore(&qp->s_lock, flags); - clear_bit(IPATH_S_BUSY, &qp->s_flags); - -bail: - return; + return 0; } /** @@ -335,12 +241,15 @@ void ipath_uc_rcv(struct ipath_ibdev *dev, struct ipath_ib_header *hdr, u32 hdrsize; u32 psn; u32 pad; - unsigned long flags; struct ib_wc wc; u32 pmtu = ib_mtu_enum_to_int(qp->path_mtu); struct ib_reth *reth; int header_in_data; + /* Validate the SLID. See Ch. 9.6.1.5 */ + if (unlikely(be16_to_cpu(hdr->lrh[3]) != qp->remote_ah_attr.dlid)) + goto done; + /* Check for GRH */ if (!has_grh) { ohdr = &hdr->u.oth; @@ -356,8 +265,7 @@ void ipath_uc_rcv(struct ipath_ibdev *dev, struct ipath_ib_header *hdr, * size to 56 bytes so the last 4 bytes of * the BTH header (PSN) is in the data buffer. */ - header_in_data = - ipath_layer_get_rcvhdrentsize(dev->dd) == 16; + header_in_data = dev->dd->ipath_rcvhdrentsize == 16; if (header_in_data) { psn = be32_to_cpu(((__be32 *) data)[0]); data += sizeof(__be32); @@ -373,8 +281,6 @@ void ipath_uc_rcv(struct ipath_ibdev *dev, struct ipath_ib_header *hdr, wc.imm_data = 0; wc.wc_flags = 0; - spin_lock_irqsave(&qp->r_rq.lock, flags); - /* Compare the PSN verses the expected PSN. */ if (unlikely(ipath_cmp24(psn, qp->r_psn) != 0)) { /* @@ -535,12 +441,13 @@ void ipath_uc_rcv(struct ipath_ibdev *dev, struct ipath_ib_header *hdr, if (qp->r_len != 0) { u32 rkey = be32_to_cpu(reth->rkey); u64 vaddr = be64_to_cpu(reth->vaddr); + int ok; /* Check rkey */ - if (unlikely(!ipath_rkey_ok( - dev, &qp->r_sge, qp->r_len, - vaddr, rkey, - IB_ACCESS_REMOTE_WRITE))) { + ok = ipath_rkey_ok(qp, &qp->r_sge, qp->r_len, + vaddr, rkey, + IB_ACCESS_REMOTE_WRITE); + if (unlikely(!ok)) { dev->n_pkt_drops++; goto done; } @@ -558,8 +465,7 @@ void ipath_uc_rcv(struct ipath_ibdev *dev, struct ipath_ib_header *hdr, } if (opcode == OP(RDMA_WRITE_ONLY)) goto rdma_last; - else if (opcode == - OP(RDMA_WRITE_ONLY_WITH_IMMEDIATE)) + else if (opcode == OP(RDMA_WRITE_ONLY_WITH_IMMEDIATE)) goto rdma_last_imm; /* FALLTHROUGH */ case OP(RDMA_WRITE_MIDDLE): @@ -592,9 +498,9 @@ void ipath_uc_rcv(struct ipath_ibdev *dev, struct ipath_ib_header *hdr, dev->n_pkt_drops++; goto done; } - if (qp->r_reuse_sge) { + if (qp->r_reuse_sge) qp->r_reuse_sge = 0; - } else if (!ipath_get_rwqe(qp, 1)) { + else if (!ipath_get_rwqe(qp, 1)) { dev->n_pkt_drops++; goto done; } @@ -631,15 +537,11 @@ void ipath_uc_rcv(struct ipath_ibdev *dev, struct ipath_ib_header *hdr, default: /* Drop packet for unknown opcodes. */ - spin_unlock_irqrestore(&qp->r_rq.lock, flags); dev->n_pkt_drops++; - goto bail; + goto done; } qp->r_psn++; qp->r_state = opcode; done: - spin_unlock_irqrestore(&qp->r_rq.lock, flags); - -bail: return; }