qp->s_busy = 0;
qp->s_flags &= IPATH_S_SIGNAL_REQ_WR;
qp->s_hdrwords = 0;
+ qp->s_wqe = NULL;
qp->s_psn = 0;
qp->r_psn = 0;
qp->r_msn = 0;
switch (init_attr->qp_type) {
case IB_QPT_UC:
case IB_QPT_RC:
+ case IB_QPT_UD:
+ case IB_QPT_SMI:
+ case IB_QPT_GSI:
sz = sizeof(struct ipath_sge) *
init_attr->cap.max_send_sge +
sizeof(struct ipath_swqe);
ret = ERR_PTR(-ENOMEM);
goto bail;
}
- /* FALLTHROUGH */
- case IB_QPT_UD:
- case IB_QPT_SMI:
- case IB_QPT_GSI:
sz = sizeof(*qp);
if (init_attr->srq) {
struct ipath_srq *srq = to_isrq(init_attr->srq);
spin_lock_init(&qp->r_rq.lock);
atomic_set(&qp->refcount, 0);
init_waitqueue_head(&qp->wait);
- tasklet_init(&qp->s_task, ipath_do_ruc_send,
- (unsigned long)qp);
+ tasklet_init(&qp->s_task, ipath_do_send, (unsigned long)qp);
INIT_LIST_HEAD(&qp->piowait);
INIT_LIST_HEAD(&qp->timerwait);
qp->state = IB_QPS_RESET;
* Note that we are in the responder's side of the QP context.
* Note the QP s_lock must be held.
*/
-static int ipath_make_rc_ack(struct ipath_qp *qp,
- struct ipath_other_headers *ohdr,
- u32 pmtu, u32 *bth0p, u32 *bth2p)
+static int ipath_make_rc_ack(struct ipath_ibdev *dev, struct ipath_qp *qp,
+ struct ipath_other_headers *ohdr, u32 pmtu)
{
struct ipath_ack_entry *e;
u32 hwords;
}
qp->s_hdrwords = hwords;
qp->s_cur_size = len;
- *bth0p = bth0 | (1 << 22); /* Set M bit */
- *bth2p = bth2;
+ ipath_make_ruc_header(dev, qp, ohdr, bth0, bth2);
return 1;
bail:
/**
* ipath_make_rc_req - construct a request packet (SEND, RDMA r/w, ATOMIC)
* @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
*
* Return 1 if constructed; otherwise, return 0.
- * Note the QP s_lock must be held and interrupts disabled.
*/
-int ipath_make_rc_req(struct ipath_qp *qp,
- struct ipath_other_headers *ohdr,
- u32 pmtu, u32 *bth0p, u32 *bth2p)
+int ipath_make_rc_req(struct ipath_qp *qp)
{
struct ipath_ibdev *dev = to_idev(qp->ibqp.device);
+ struct ipath_other_headers *ohdr;
struct ipath_sge_state *ss;
struct ipath_swqe *wqe;
u32 hwords;
u32 len;
u32 bth0;
u32 bth2;
+ u32 pmtu = ib_mtu_enum_to_int(qp->path_mtu);
char newreq;
+ unsigned long flags;
+ int ret = 0;
+
+ ohdr = &qp->s_hdr.u.oth;
+ if (qp->remote_ah_attr.ah_flags & IB_AH_GRH)
+ ohdr = &qp->s_hdr.u.l.oth;
+
+ /*
+ * The lock is needed to synchronize between the sending tasklet,
+ * the receive interrupt handler, and timeout resends.
+ */
+ spin_lock_irqsave(&qp->s_lock, flags);
/* Sending responses has higher priority over sending requests. */
if ((qp->r_head_ack_queue != qp->s_tail_ack_queue ||
(qp->s_flags & IPATH_S_ACK_PENDING) ||
qp->s_ack_state != OP(ACKNOWLEDGE)) &&
- ipath_make_rc_ack(qp, ohdr, pmtu, bth0p, bth2p))
+ ipath_make_rc_ack(dev, qp, ohdr, pmtu))
goto done;
if (!(ib_ipath_state_ops[qp->state] & IPATH_PROCESS_SEND_OK) ||
qp->s_hdrwords = hwords;
qp->s_cur_sge = ss;
qp->s_cur_size = len;
- *bth0p = bth0 | (qp->s_state << 24);
- *bth2p = bth2;
+ ipath_make_ruc_header(dev, qp, ohdr, bth0 | (qp->s_state << 24), bth2);
done:
- return 1;
-
+ ret = 1;
bail:
- return 0;
+ spin_unlock_irqrestore(&qp->s_lock, flags);
+ return ret;
}
/**
/*
* If we can send the ACK, clear the ACK state.
*/
- if (ipath_verbs_send(dev->dd, hwords, (u32 *) &hdr, 0, NULL) == 0) {
+ if (ipath_verbs_send(qp, &hdr, hwords, NULL, 0) == 0) {
dev->n_unicast_xmit++;
goto done;
}
wc->vendor_err = 0;
wc->byte_len = 0;
wc->qp = &qp->ibqp;
+ wc->imm_data = 0;
wc->src_qp = qp->remote_qpn;
+ wc->wc_flags = 0;
wc->pkey_index = 0;
wc->slid = qp->remote_ah_attr.dlid;
wc->sl = qp->remote_ah_attr.sl;
wc.vendor_err = 0;
wc.byte_len = 0;
wc.qp = &qp->ibqp;
+ wc.imm_data = 0;
wc.src_qp = qp->remote_qpn;
+ wc.wc_flags = 0;
wc.pkey_index = 0;
wc.slid = qp->remote_ah_attr.dlid;
wc.sl = qp->remote_ah_attr.sl;
qp->r_ack_psn = qp->r_psn - 1;
goto send_ack;
}
+ /*
+ * Try to send a simple ACK to work around a Mellanox bug
+ * which doesn't accept a RDMA read response or atomic
+ * response as an ACK for earlier SENDs or RDMA writes.
+ */
+ if (qp->r_head_ack_queue == qp->s_tail_ack_queue &&
+ !(qp->s_flags & IPATH_S_ACK_PENDING) &&
+ qp->s_ack_state == OP(ACKNOWLEDGE)) {
+ spin_unlock_irqrestore(&qp->s_lock, flags);
+ qp->r_nak_state = 0;
+ qp->r_ack_psn = qp->s_ack_queue[i].psn - 1;
+ goto send_ack;
+ }
/*
* Resend the RDMA read or atomic op which
* ACKs this duplicate request.
* SOFTWARE.
*/
+#include <linux/spinlock.h>
+
#include "ipath_verbs.h"
#include "ipath_kernel.h"
spin_unlock_irqrestore(&dev->pending_lock, flags);
}
-static int init_sge(struct ipath_qp *qp, struct ipath_rwqe *wqe)
+/**
+ * ipath_init_sge - Validate a RWQE and fill in the SGE state
+ * @qp: the QP
+ *
+ * Return 1 if OK.
+ */
+int ipath_init_sge(struct ipath_qp *qp, struct ipath_rwqe *wqe,
+ u32 *lengthp, struct ipath_sge_state *ss)
{
- int user = to_ipd(qp->ibqp.pd)->user;
int i, j, ret;
struct ib_wc wc;
- qp->r_len = 0;
+ *lengthp = 0;
for (i = j = 0; i < wqe->num_sge; i++) {
if (wqe->sg_list[i].length == 0)
continue;
/* Check LKEY */
- if ((user && wqe->sg_list[i].lkey == 0) ||
- !ipath_lkey_ok(qp, &qp->r_sg_list[j], &wqe->sg_list[i],
- IB_ACCESS_LOCAL_WRITE))
+ if (!ipath_lkey_ok(qp, j ? &ss->sg_list[j - 1] : &ss->sge,
+ &wqe->sg_list[i], IB_ACCESS_LOCAL_WRITE))
goto bad_lkey;
- qp->r_len += wqe->sg_list[i].length;
+ *lengthp += wqe->sg_list[i].length;
j++;
}
- qp->r_sge.sge = qp->r_sg_list[0];
- qp->r_sge.sg_list = qp->r_sg_list + 1;
- qp->r_sge.num_sge = j;
+ ss->num_sge = j;
ret = 1;
goto bail;
u32 tail;
int ret;
+ qp->r_sge.sg_list = qp->r_sg_list;
+
if (qp->ibqp.srq) {
srq = to_isrq(qp->ibqp.srq);
handler = srq->ibsrq.event_handler;
wqe = get_rwqe_ptr(rq, tail);
if (++tail >= rq->size)
tail = 0;
- } while (!wr_id_only && !init_sge(qp, wqe));
+ } while (!wr_id_only && !ipath_init_sge(qp, wqe, &qp->r_len,
+ &qp->r_sge));
qp->r_wr_id = wqe->wr_id;
wq->tail = tail;
/**
* ipath_ruc_loopback - handle UC and RC lookback requests
- * @sqp: the loopback QP
+ * @sqp: the sending QP
*
- * This is called from ipath_do_uc_send() or ipath_do_rc_send() to
+ * This is called from ipath_do_send() to
* forward a WQE addressed to the same HCA.
* Note that although we are single threaded due to the tasklet, we still
* have to protect against post_send(). We don't have to worry about
wc.byte_len = wqe->length;
wc.qp = &qp->ibqp;
wc.src_qp = qp->remote_qpn;
- /* XXX do we know which pkey matched? Only needed for GSI. */
wc.pkey_index = 0;
wc.slid = qp->remote_ah_attr.dlid;
wc.sl = qp->remote_ah_attr.sl;
wc.dlid_path_bits = 0;
+ wc.port_num = 1;
/* Signal completion event if the solicited bit is set. */
ipath_cq_enter(to_icq(qp->ibqp.recv_cq), &wc,
wqe->wr.send_flags & IB_SEND_SOLICITED);
send_comp:
sqp->s_rnr_retry = sqp->s_rnr_retry_cnt;
-
- if (!(sqp->s_flags & IPATH_S_SIGNAL_REQ_WR) ||
- (wqe->wr.send_flags & IB_SEND_SIGNALED)) {
- wc.wr_id = wqe->wr.wr_id;
- wc.status = IB_WC_SUCCESS;
- wc.opcode = ib_ipath_wc_opcode[wqe->wr.opcode];
- wc.vendor_err = 0;
- wc.byte_len = wqe->length;
- wc.qp = &sqp->ibqp;
- wc.src_qp = 0;
- wc.pkey_index = 0;
- wc.slid = 0;
- wc.sl = 0;
- wc.dlid_path_bits = 0;
- wc.port_num = 0;
- ipath_cq_enter(to_icq(sqp->ibqp.send_cq), &wc, 0);
- }
-
- /* Update s_last now that we are finished with the SWQE */
- spin_lock_irqsave(&sqp->s_lock, flags);
- if (++sqp->s_last >= sqp->s_size)
- sqp->s_last = 0;
- spin_unlock_irqrestore(&sqp->s_lock, flags);
+ ipath_send_complete(sqp, wqe, IB_WC_SUCCESS);
goto again;
done:
wake_up(&qp->wait);
}
-static int want_buffer(struct ipath_devdata *dd)
+static void want_buffer(struct ipath_devdata *dd)
{
set_bit(IPATH_S_PIOINTBUFAVAIL, &dd->ipath_sendctrl);
ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl,
dd->ipath_sendctrl);
-
- return 0;
}
/**
*
* Called when we run out of PIO buffers.
*/
-static void ipath_no_bufs_available(struct ipath_qp *qp, struct ipath_ibdev *dev)
+static void ipath_no_bufs_available(struct ipath_qp *qp,
+ struct ipath_ibdev *dev)
{
unsigned long flags;
- spin_lock_irqsave(&dev->pending_lock, flags);
- if (list_empty(&qp->piowait))
- list_add_tail(&qp->piowait, &dev->piowait);
- spin_unlock_irqrestore(&dev->pending_lock, flags);
/*
* Note that as soon as want_buffer() is called and
* possibly before it returns, ipath_ib_piobufavail()
* We leave the busy flag set so that another post send doesn't
* try to put the same QP on the piowait list again.
*/
+ spin_lock_irqsave(&dev->pending_lock, flags);
+ list_add_tail(&qp->piowait, &dev->piowait);
+ spin_unlock_irqrestore(&dev->pending_lock, flags);
want_buffer(dev->dd);
dev->n_piowait++;
}
-/**
- * ipath_post_ruc_send - post RC and UC sends
- * @qp: the QP to post on
- * @wr: the work request to send
- */
-int ipath_post_ruc_send(struct ipath_qp *qp, struct ib_send_wr *wr)
-{
- struct ipath_swqe *wqe;
- unsigned long flags;
- u32 next;
- int i, j;
- int acc;
- int ret;
-
- /*
- * Don't allow RDMA reads or atomic operations on UC or
- * undefined operations.
- * Make sure buffer is large enough to hold the result for atomics.
- */
- if (qp->ibqp.qp_type == IB_QPT_UC) {
- if ((unsigned) wr->opcode >= IB_WR_RDMA_READ) {
- ret = -EINVAL;
- goto bail;
- }
- } else if ((unsigned) wr->opcode > IB_WR_ATOMIC_FETCH_AND_ADD) {
- ret = -EINVAL;
- goto bail;
- } else if (wr->opcode >= IB_WR_ATOMIC_CMP_AND_SWP &&
- (wr->num_sge == 0 ||
- wr->sg_list[0].length < sizeof(u64) ||
- wr->sg_list[0].addr & (sizeof(u64) - 1))) {
- ret = -EINVAL;
- goto bail;
- } else if (wr->opcode >= IB_WR_RDMA_READ && !qp->s_max_rd_atomic) {
- ret = -EINVAL;
- goto bail;
- }
- /* IB spec says that num_sge == 0 is OK. */
- if (wr->num_sge > qp->s_max_sge) {
- ret = -ENOMEM;
- goto bail;
- }
- spin_lock_irqsave(&qp->s_lock, flags);
- next = qp->s_head + 1;
- if (next >= qp->s_size)
- next = 0;
- if (next == qp->s_last) {
- spin_unlock_irqrestore(&qp->s_lock, flags);
- ret = -EINVAL;
- goto bail;
- }
-
- wqe = get_swqe_ptr(qp, qp->s_head);
- wqe->wr = *wr;
- wqe->ssn = qp->s_ssn++;
- wqe->sg_list[0].mr = NULL;
- wqe->sg_list[0].vaddr = NULL;
- wqe->sg_list[0].length = 0;
- wqe->sg_list[0].sge_length = 0;
- wqe->length = 0;
- acc = wr->opcode >= IB_WR_RDMA_READ ? IB_ACCESS_LOCAL_WRITE : 0;
- for (i = 0, j = 0; i < wr->num_sge; i++) {
- if (to_ipd(qp->ibqp.pd)->user && wr->sg_list[i].lkey == 0) {
- spin_unlock_irqrestore(&qp->s_lock, flags);
- ret = -EINVAL;
- goto bail;
- }
- if (wr->sg_list[i].length == 0)
- continue;
- if (!ipath_lkey_ok(qp, &wqe->sg_list[j], &wr->sg_list[i],
- acc)) {
- spin_unlock_irqrestore(&qp->s_lock, flags);
- ret = -EINVAL;
- goto bail;
- }
- wqe->length += wr->sg_list[i].length;
- j++;
- }
- wqe->wr.num_sge = j;
- qp->s_head = next;
- spin_unlock_irqrestore(&qp->s_lock, flags);
-
- ipath_do_ruc_send((unsigned long) qp);
-
- ret = 0;
-
-bail:
- return ret;
-}
-
/**
* ipath_make_grh - construct a GRH header
* @dev: a pointer to the ipath device
return sizeof(struct ib_grh) / sizeof(u32);
}
+void ipath_make_ruc_header(struct ipath_ibdev *dev, struct ipath_qp *qp,
+ struct ipath_other_headers *ohdr,
+ u32 bth0, u32 bth2)
+{
+ u16 lrh0;
+ u32 nwords;
+ u32 extra_bytes;
+
+ /* Construct the header. */
+ extra_bytes = -qp->s_cur_size & 3;
+ nwords = (qp->s_cur_size + extra_bytes) >> 2;
+ lrh0 = IPATH_LRH_BTH;
+ if (unlikely(qp->remote_ah_attr.ah_flags & IB_AH_GRH)) {
+ qp->s_hdrwords += ipath_make_grh(dev, &qp->s_hdr.u.l.grh,
+ &qp->remote_ah_attr.grh,
+ qp->s_hdrwords, nwords);
+ lrh0 = IPATH_LRH_GRH;
+ }
+ lrh0 |= qp->remote_ah_attr.sl << 4;
+ qp->s_hdr.lrh[0] = cpu_to_be16(lrh0);
+ qp->s_hdr.lrh[1] = cpu_to_be16(qp->remote_ah_attr.dlid);
+ qp->s_hdr.lrh[2] = cpu_to_be16(qp->s_hdrwords + nwords + SIZE_OF_CRC);
+ qp->s_hdr.lrh[3] = cpu_to_be16(dev->dd->ipath_lid);
+ bth0 |= ipath_get_pkey(dev->dd, qp->s_pkey_index);
+ bth0 |= extra_bytes << 20;
+ ohdr->bth[0] = cpu_to_be32(bth0 | (1 << 22));
+ ohdr->bth[1] = cpu_to_be32(qp->remote_qpn);
+ ohdr->bth[2] = cpu_to_be32(bth2);
+}
+
/**
- * ipath_do_ruc_send - perform a send on an RC or UC QP
+ * ipath_do_send - perform a send on a QP
* @data: contains a pointer to the QP
*
* Process entries in the send work queue until credit or queue is
* exhausted. Only allow one CPU to send a packet per QP (tasklet).
- * Otherwise, after we drop the QP s_lock, two threads could send
- * packets out of order.
+ * Otherwise, two threads could send packets out of order.
*/
-void ipath_do_ruc_send(unsigned long data)
+void ipath_do_send(unsigned long data)
{
struct ipath_qp *qp = (struct ipath_qp *)data;
struct ipath_ibdev *dev = to_idev(qp->ibqp.device);
- unsigned long flags;
- u16 lrh0;
- u32 nwords;
- u32 extra_bytes;
- u32 bth0;
- u32 bth2;
- u32 pmtu = ib_mtu_enum_to_int(qp->path_mtu);
- struct ipath_other_headers *ohdr;
+ int (*make_req)(struct ipath_qp *qp);
if (test_and_set_bit(IPATH_S_BUSY, &qp->s_busy))
goto bail;
- if (unlikely(qp->remote_ah_attr.dlid == dev->dd->ipath_lid)) {
+ if ((qp->ibqp.qp_type == IB_QPT_RC ||
+ qp->ibqp.qp_type == IB_QPT_UC) &&
+ qp->remote_ah_attr.dlid == dev->dd->ipath_lid) {
ipath_ruc_loopback(qp);
goto clear;
}
- ohdr = &qp->s_hdr.u.oth;
- if (qp->remote_ah_attr.ah_flags & IB_AH_GRH)
- ohdr = &qp->s_hdr.u.l.oth;
+ if (qp->ibqp.qp_type == IB_QPT_RC)
+ make_req = ipath_make_rc_req;
+ else if (qp->ibqp.qp_type == IB_QPT_UC)
+ make_req = ipath_make_uc_req;
+ else
+ make_req = ipath_make_ud_req;
again:
/* Check for a constructed packet to be sent. */
* 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)) {
+ if (ipath_verbs_send(qp, &qp->s_hdr, qp->s_hdrwords,
+ qp->s_cur_sge, qp->s_cur_size)) {
ipath_no_bufs_available(qp, dev);
goto bail;
}
qp->s_hdrwords = 0;
}
- /*
- * The lock is needed to synchronize between setting
- * qp->s_ack_state, resend timer, and post_send().
- */
- spin_lock_irqsave(&qp->s_lock, flags);
-
- if (!((qp->ibqp.qp_type == IB_QPT_RC) ?
- ipath_make_rc_req(qp, ohdr, pmtu, &bth0, &bth2) :
- ipath_make_uc_req(qp, ohdr, pmtu, &bth0, &bth2))) {
- /*
- * Clear the busy bit before unlocking to avoid races with
- * adding new work queue items and then failing to process
- * them.
- */
- clear_bit(IPATH_S_BUSY, &qp->s_busy);
- spin_unlock_irqrestore(&qp->s_lock, flags);
- goto bail;
- }
+ if (make_req(qp))
+ goto again;
+clear:
+ clear_bit(IPATH_S_BUSY, &qp->s_busy);
+bail:;
+}
- spin_unlock_irqrestore(&qp->s_lock, flags);
+void ipath_send_complete(struct ipath_qp *qp, struct ipath_swqe *wqe,
+ enum ib_wc_status status)
+{
+ u32 last = qp->s_last;
- /* Construct the header. */
- extra_bytes = (4 - qp->s_cur_size) & 3;
- nwords = (qp->s_cur_size + extra_bytes) >> 2;
- lrh0 = IPATH_LRH_BTH;
- if (unlikely(qp->remote_ah_attr.ah_flags & IB_AH_GRH)) {
- qp->s_hdrwords += ipath_make_grh(dev, &qp->s_hdr.u.l.grh,
- &qp->remote_ah_attr.grh,
- qp->s_hdrwords, nwords);
- lrh0 = IPATH_LRH_GRH;
- }
- lrh0 |= qp->remote_ah_attr.sl << 4;
- qp->s_hdr.lrh[0] = cpu_to_be16(lrh0);
- qp->s_hdr.lrh[1] = cpu_to_be16(qp->remote_ah_attr.dlid);
- qp->s_hdr.lrh[2] = cpu_to_be16(qp->s_hdrwords + nwords +
- SIZE_OF_CRC);
- qp->s_hdr.lrh[3] = cpu_to_be16(dev->dd->ipath_lid);
- bth0 |= ipath_get_pkey(dev->dd, qp->s_pkey_index);
- 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);
+ if (++last == qp->s_size)
+ last = 0;
+ qp->s_last = last;
- /* Check for more work to do. */
- goto again;
+ /* See ch. 11.2.4.1 and 10.7.3.1 */
+ if (!(qp->s_flags & IPATH_S_SIGNAL_REQ_WR) ||
+ (wqe->wr.send_flags & IB_SEND_SIGNALED) ||
+ status != IB_WC_SUCCESS) {
+ struct ib_wc wc;
-clear:
- clear_bit(IPATH_S_BUSY, &qp->s_busy);
-bail:
- return;
+ wc.wr_id = wqe->wr.wr_id;
+ wc.status = status;
+ wc.opcode = ib_ipath_wc_opcode[wqe->wr.opcode];
+ wc.vendor_err = 0;
+ wc.byte_len = wqe->length;
+ wc.imm_data = 0;
+ wc.qp = &qp->ibqp;
+ wc.src_qp = 0;
+ wc.wc_flags = 0;
+ wc.pkey_index = 0;
+ wc.slid = 0;
+ wc.sl = 0;
+ wc.dlid_path_bits = 0;
+ wc.port_num = 0;
+ ipath_cq_enter(to_icq(qp->ibqp.send_cq), &wc, 0);
+ }
}
/* cut down ridiculously long IB macro names */
#define OP(x) IB_OPCODE_UC_##x
-static void complete_last_send(struct ipath_qp *qp, struct ipath_swqe *wqe,
- struct ib_wc *wc)
-{
- if (++qp->s_last == qp->s_size)
- qp->s_last = 0;
- if (!(qp->s_flags & IPATH_S_SIGNAL_REQ_WR) ||
- (wqe->wr.send_flags & IB_SEND_SIGNALED)) {
- wc->wr_id = wqe->wr.wr_id;
- wc->status = IB_WC_SUCCESS;
- wc->opcode = ib_ipath_wc_opcode[wqe->wr.opcode];
- wc->vendor_err = 0;
- wc->byte_len = wqe->length;
- wc->qp = &qp->ibqp;
- wc->src_qp = qp->remote_qpn;
- wc->pkey_index = 0;
- wc->slid = qp->remote_ah_attr.dlid;
- wc->sl = qp->remote_ah_attr.sl;
- wc->dlid_path_bits = 0;
- wc->port_num = 0;
- ipath_cq_enter(to_icq(qp->ibqp.send_cq), wc, 0);
- }
-}
-
/**
* 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
*
* Return 1 if constructed; otherwise, return 0.
- * Note the QP s_lock must be held and interrupts disabled.
*/
-int ipath_make_uc_req(struct ipath_qp *qp,
- struct ipath_other_headers *ohdr,
- u32 pmtu, u32 *bth0p, u32 *bth2p)
+int ipath_make_uc_req(struct ipath_qp *qp)
{
+ struct ipath_other_headers *ohdr;
struct ipath_swqe *wqe;
u32 hwords;
u32 bth0;
u32 len;
- struct ib_wc wc;
+ u32 pmtu = ib_mtu_enum_to_int(qp->path_mtu);
+ int ret = 0;
if (!(ib_ipath_state_ops[qp->state] & IPATH_PROCESS_SEND_OK))
goto done;
+ ohdr = &qp->s_hdr.u.oth;
+ if (qp->remote_ah_attr.ah_flags & IB_AH_GRH)
+ ohdr = &qp->s_hdr.u.l.oth;
+
/* header size in 32-bit words LRH+BTH = (8+12)/4. */
hwords = 5;
bth0 = 1 << 22; /* Set M bit */
/* Get the next send request. */
- wqe = get_swqe_ptr(qp, qp->s_last);
+ wqe = get_swqe_ptr(qp, qp->s_cur);
+ qp->s_wqe = NULL;
switch (qp->s_state) {
default:
- /*
- * Signal the completion of the last send
- * (if there is one).
- */
- if (qp->s_last != qp->s_tail) {
- complete_last_send(qp, wqe, &wc);
- wqe = get_swqe_ptr(qp, qp->s_last);
- }
-
/* Check if send work queue is empty. */
- if (qp->s_tail == qp->s_head)
+ if (qp->s_cur == qp->s_head)
goto done;
/*
* Start a new request.
}
if (wqe->wr.send_flags & IB_SEND_SOLICITED)
bth0 |= 1 << 23;
+ qp->s_wqe = wqe;
+ if (++qp->s_cur >= qp->s_size)
+ qp->s_cur = 0;
break;
case IB_WR_RDMA_WRITE:
if (wqe->wr.send_flags & IB_SEND_SOLICITED)
bth0 |= 1 << 23;
}
+ qp->s_wqe = wqe;
+ if (++qp->s_cur >= qp->s_size)
+ qp->s_cur = 0;
break;
default:
goto done;
}
- if (++qp->s_tail >= qp->s_size)
- qp->s_tail = 0;
break;
case OP(SEND_FIRST):
}
if (wqe->wr.send_flags & IB_SEND_SOLICITED)
bth0 |= 1 << 23;
+ qp->s_wqe = wqe;
+ if (++qp->s_cur >= qp->s_size)
+ qp->s_cur = 0;
break;
case OP(RDMA_WRITE_FIRST):
if (wqe->wr.send_flags & IB_SEND_SOLICITED)
bth0 |= 1 << 23;
}
+ qp->s_wqe = wqe;
+ if (++qp->s_cur >= qp->s_size)
+ qp->s_cur = 0;
break;
}
qp->s_len -= len;
qp->s_hdrwords = hwords;
qp->s_cur_sge = &qp->s_sge;
qp->s_cur_size = len;
- *bth0p = bth0 | (qp->s_state << 24);
- *bth2p = qp->s_next_psn++ & IPATH_PSN_MASK;
- return 1;
+ ipath_make_ruc_header(to_idev(qp->ibqp.device),
+ qp, ohdr, bth0 | (qp->s_state << 24),
+ qp->s_next_psn++ & IPATH_PSN_MASK);
+ ret = 1;
done:
- return 0;
+ return ret;
}
/**
#include "ipath_verbs.h"
#include "ipath_kernel.h"
-static int init_sge(struct ipath_qp *qp, struct ipath_rwqe *wqe,
- u32 *lengthp, struct ipath_sge_state *ss)
-{
- int user = to_ipd(qp->ibqp.pd)->user;
- int i, j, ret;
- struct ib_wc wc;
-
- *lengthp = 0;
- for (i = j = 0; i < wqe->num_sge; i++) {
- if (wqe->sg_list[i].length == 0)
- continue;
- /* Check LKEY */
- if ((user && wqe->sg_list[i].lkey == 0) ||
- !ipath_lkey_ok(qp, j ? &ss->sg_list[j - 1] : &ss->sge,
- &wqe->sg_list[i], IB_ACCESS_LOCAL_WRITE))
- goto bad_lkey;
- *lengthp += wqe->sg_list[i].length;
- j++;
- }
- ss->num_sge = j;
- ret = 1;
- goto bail;
-
-bad_lkey:
- wc.wr_id = wqe->wr_id;
- wc.status = IB_WC_LOC_PROT_ERR;
- wc.opcode = IB_WC_RECV;
- wc.vendor_err = 0;
- wc.byte_len = 0;
- wc.imm_data = 0;
- wc.qp = &qp->ibqp;
- wc.src_qp = 0;
- wc.wc_flags = 0;
- wc.pkey_index = 0;
- wc.slid = 0;
- wc.sl = 0;
- wc.dlid_path_bits = 0;
- wc.port_num = 0;
- /* Signal solicited completion event. */
- ipath_cq_enter(to_icq(qp->ibqp.recv_cq), &wc, 1);
- ret = 0;
-bail:
- return ret;
-}
-
/**
* ipath_ud_loopback - handle send on loopback QPs
- * @sqp: the QP
- * @ss: the SGE state
- * @length: the length of the data to send
- * @wr: the work request
- * @wc: the work completion entry
+ * @sqp: the sending QP
+ * @swqe: the send work request
*
- * This is called from ipath_post_ud_send() to forward a WQE addressed
+ * This is called from ipath_make_ud_req() to forward a WQE addressed
* to the same HCA.
* Note that the receive interrupt handler may be calling ipath_ud_rcv()
* while this is being called.
*/
-static void ipath_ud_loopback(struct ipath_qp *sqp,
- struct ipath_sge_state *ss,
- u32 length, struct ib_send_wr *wr,
- struct ib_wc *wc)
+static void ipath_ud_loopback(struct ipath_qp *sqp, struct ipath_swqe *swqe)
{
struct ipath_ibdev *dev = to_idev(sqp->ibqp.device);
struct ipath_qp *qp;
struct ipath_rwq *wq;
struct ipath_rwqe *wqe;
void (*handler)(struct ib_event *, void *);
+ struct ib_wc wc;
u32 tail;
u32 rlen;
+ u32 length;
- qp = ipath_lookup_qpn(&dev->qp_table, wr->wr.ud.remote_qpn);
- if (!qp)
- return;
+ qp = ipath_lookup_qpn(&dev->qp_table, swqe->wr.wr.ud.remote_qpn);
+ if (!qp) {
+ dev->n_pkt_drops++;
+ goto send_comp;
+ }
+
+ rsge.sg_list = NULL;
/*
* Check that the qkey matches (except for QP0, see 9.6.1.4.1).
* qkey from the QP context instead of the WR (see 10.2.5).
*/
if (unlikely(qp->ibqp.qp_num &&
- ((int) wr->wr.ud.remote_qkey < 0
- ? qp->qkey : wr->wr.ud.remote_qkey) != qp->qkey)) {
+ ((int) swqe->wr.wr.ud.remote_qkey < 0 ?
+ sqp->qkey : swqe->wr.wr.ud.remote_qkey) != qp->qkey)) {
/* XXX OK to lose a count once in a while. */
dev->qkey_violations++;
dev->n_pkt_drops++;
- goto done;
+ goto drop;
}
/*
* A GRH is expected to preceed the data even if not
* present on the wire.
*/
- wc->byte_len = length + sizeof(struct ib_grh);
+ length = swqe->length;
+ wc.byte_len = length + sizeof(struct ib_grh);
- if (wr->opcode == IB_WR_SEND_WITH_IMM) {
- wc->wc_flags = IB_WC_WITH_IMM;
- wc->imm_data = wr->imm_data;
+ if (swqe->wr.opcode == IB_WR_SEND_WITH_IMM) {
+ wc.wc_flags = IB_WC_WITH_IMM;
+ wc.imm_data = swqe->wr.imm_data;
} else {
- wc->wc_flags = 0;
- wc->imm_data = 0;
+ wc.wc_flags = 0;
+ wc.imm_data = 0;
}
- if (wr->num_sge > 1) {
- rsge.sg_list = kmalloc((wr->num_sge - 1) *
- sizeof(struct ipath_sge),
- GFP_ATOMIC);
- } else
- rsge.sg_list = NULL;
-
/*
- * Get the next work request entry to find where to put the data.
- * Note that it is safe to drop the lock after changing rq->tail
- * since ipath_post_receive() won't fill the empty slot.
+ * This would be a lot simpler if we could call ipath_get_rwqe()
+ * but that uses state that the receive interrupt handler uses
+ * so we would need to lock out receive interrupts while doing
+ * local loopback.
*/
if (qp->ibqp.srq) {
srq = to_isrq(qp->ibqp.srq);
rq = &qp->r_rq;
}
+ if (rq->max_sge > 1) {
+ /*
+ * XXX We could use GFP_KERNEL if ipath_do_send()
+ * was always called from the tasklet instead of
+ * from ipath_post_send().
+ */
+ rsge.sg_list = kmalloc((rq->max_sge - 1) *
+ sizeof(struct ipath_sge),
+ GFP_ATOMIC);
+ if (!rsge.sg_list) {
+ dev->n_pkt_drops++;
+ goto drop;
+ }
+ }
+
+ /*
+ * Get the next work request entry to find where to put the data.
+ * Note that it is safe to drop the lock after changing rq->tail
+ * since ipath_post_receive() won't fill the empty slot.
+ */
spin_lock_irqsave(&rq->lock, flags);
wq = rq->wq;
tail = wq->tail;
- while (1) {
- if (unlikely(tail == wq->head)) {
- spin_unlock_irqrestore(&rq->lock, flags);
- dev->n_pkt_drops++;
- goto bail_sge;
- }
- /* Make sure entry is read after head index is read. */
- smp_rmb();
- wqe = get_rwqe_ptr(rq, tail);
- if (++tail >= rq->size)
- tail = 0;
- if (init_sge(qp, wqe, &rlen, &rsge))
- break;
- wq->tail = tail;
+ /* Validate tail before using it since it is user writable. */
+ if (tail >= rq->size)
+ tail = 0;
+ if (unlikely(tail == wq->head)) {
+ spin_unlock_irqrestore(&rq->lock, flags);
+ dev->n_pkt_drops++;
+ goto drop;
+ }
+ wqe = get_rwqe_ptr(rq, tail);
+ if (!ipath_init_sge(qp, wqe, &rlen, &rsge)) {
+ spin_unlock_irqrestore(&rq->lock, flags);
+ dev->n_pkt_drops++;
+ goto drop;
}
/* Silently drop packets which are too big. */
- if (wc->byte_len > rlen) {
+ if (wc.byte_len > rlen) {
spin_unlock_irqrestore(&rq->lock, flags);
dev->n_pkt_drops++;
- goto bail_sge;
+ goto drop;
}
+ if (++tail >= rq->size)
+ tail = 0;
wq->tail = tail;
- wc->wr_id = wqe->wr_id;
+ wc.wr_id = wqe->wr_id;
if (handler) {
u32 n;
} else
spin_unlock_irqrestore(&rq->lock, flags);
- ah_attr = &to_iah(wr->wr.ud.ah)->attr;
+ ah_attr = &to_iah(swqe->wr.wr.ud.ah)->attr;
if (ah_attr->ah_flags & IB_AH_GRH) {
ipath_copy_sge(&rsge, &ah_attr->grh, sizeof(struct ib_grh));
- wc->wc_flags |= IB_WC_GRH;
+ wc.wc_flags |= IB_WC_GRH;
} else
ipath_skip_sge(&rsge, sizeof(struct ib_grh));
- sge = &ss->sge;
+ sge = swqe->sg_list;
while (length) {
u32 len = sge->length;
sge->length -= len;
sge->sge_length -= len;
if (sge->sge_length == 0) {
- if (--ss->num_sge)
- *sge = *ss->sg_list++;
+ if (--swqe->wr.num_sge)
+ sge++;
} else if (sge->length == 0 && sge->mr != NULL) {
if (++sge->n >= IPATH_SEGSZ) {
if (++sge->m >= sge->mr->mapsz)
}
length -= len;
}
- wc->status = IB_WC_SUCCESS;
- wc->opcode = IB_WC_RECV;
- wc->vendor_err = 0;
- wc->qp = &qp->ibqp;
- wc->src_qp = sqp->ibqp.qp_num;
+ wc.status = IB_WC_SUCCESS;
+ wc.opcode = IB_WC_RECV;
+ wc.vendor_err = 0;
+ wc.qp = &qp->ibqp;
+ wc.src_qp = sqp->ibqp.qp_num;
/* XXX do we know which pkey matched? Only needed for GSI. */
- wc->pkey_index = 0;
- wc->slid = dev->dd->ipath_lid |
+ wc.pkey_index = 0;
+ wc.slid = dev->dd->ipath_lid |
(ah_attr->src_path_bits &
((1 << (dev->mkeyprot_resv_lmc & 7)) - 1));
- wc->sl = ah_attr->sl;
- wc->dlid_path_bits =
+ wc.sl = ah_attr->sl;
+ wc.dlid_path_bits =
ah_attr->dlid & ((1 << (dev->mkeyprot_resv_lmc & 7)) - 1);
+ wc.port_num = 1;
/* Signal completion event if the solicited bit is set. */
- ipath_cq_enter(to_icq(qp->ibqp.recv_cq), wc,
- wr->send_flags & IB_SEND_SOLICITED);
-
-bail_sge:
+ ipath_cq_enter(to_icq(qp->ibqp.recv_cq), &wc,
+ swqe->wr.send_flags & IB_SEND_SOLICITED);
+drop:
kfree(rsge.sg_list);
-done:
if (atomic_dec_and_test(&qp->refcount))
wake_up(&qp->wait);
+send_comp:
+ ipath_send_complete(sqp, swqe, IB_WC_SUCCESS);
}
/**
- * ipath_post_ud_send - post a UD send on QP
+ * ipath_make_ud_req - construct a UD request packet
* @qp: the QP
- * @wr: the work request
*
- * Note that we actually send the data as it is posted instead of putting
- * the request into a ring buffer. If we wanted to use a ring buffer,
- * we would need to save a reference to the destination address in the SWQE.
+ * Return 1 if constructed; otherwise, return 0.
*/
-int ipath_post_ud_send(struct ipath_qp *qp, struct ib_send_wr *wr)
+int ipath_make_ud_req(struct ipath_qp *qp)
{
struct ipath_ibdev *dev = to_idev(qp->ibqp.device);
struct ipath_other_headers *ohdr;
struct ib_ah_attr *ah_attr;
- struct ipath_sge_state ss;
- struct ipath_sge *sg_list;
- struct ib_wc wc;
- u32 hwords;
+ struct ipath_swqe *wqe;
u32 nwords;
- u32 len;
u32 extra_bytes;
u32 bth0;
u16 lrh0;
u16 lid;
- int i;
- int ret;
+ int ret = 0;
- if (!(ib_ipath_state_ops[qp->state] & IPATH_PROCESS_SEND_OK)) {
- ret = 0;
+ if (unlikely(!(ib_ipath_state_ops[qp->state] & IPATH_PROCESS_SEND_OK)))
goto bail;
- }
- if (wr->wr.ud.ah->pd != qp->ibqp.pd) {
- ret = -EPERM;
+ if (qp->s_cur == qp->s_head)
goto bail;
- }
- /* IB spec says that num_sge == 0 is OK. */
- if (wr->num_sge > qp->s_max_sge) {
- ret = -EINVAL;
- goto bail;
- }
-
- if (wr->num_sge > 1) {
- sg_list = kmalloc((qp->s_max_sge - 1) * sizeof(*sg_list),
- GFP_ATOMIC);
- if (!sg_list) {
- ret = -ENOMEM;
- goto bail;
- }
- } else
- sg_list = NULL;
-
- /* Check the buffer to send. */
- ss.sg_list = sg_list;
- ss.sge.mr = NULL;
- ss.sge.vaddr = NULL;
- ss.sge.length = 0;
- ss.sge.sge_length = 0;
- ss.num_sge = 0;
- len = 0;
- for (i = 0; i < wr->num_sge; i++) {
- /* Check LKEY */
- if (to_ipd(qp->ibqp.pd)->user && wr->sg_list[i].lkey == 0) {
- ret = -EINVAL;
- goto bail;
- }
-
- if (wr->sg_list[i].length == 0)
- continue;
- if (!ipath_lkey_ok(qp, ss.num_sge ?
- sg_list + ss.num_sge - 1 : &ss.sge,
- &wr->sg_list[i], 0)) {
- ret = -EINVAL;
- goto bail;
- }
- len += wr->sg_list[i].length;
- ss.num_sge++;
- }
- /* Check for invalid packet size. */
- if (len > dev->dd->ipath_ibmtu) {
- ret = -EINVAL;
- goto bail;
- }
- extra_bytes = (4 - len) & 3;
- nwords = (len + extra_bytes) >> 2;
+ wqe = get_swqe_ptr(qp, qp->s_cur);
/* Construct the header. */
- ah_attr = &to_iah(wr->wr.ud.ah)->attr;
- if (ah_attr->dlid == 0) {
- ret = -EINVAL;
- goto bail;
- }
+ ah_attr = &to_iah(wqe->wr.wr.ud.ah)->attr;
if (ah_attr->dlid >= IPATH_MULTICAST_LID_BASE) {
if (ah_attr->dlid != IPATH_PERMISSIVE_LID)
dev->n_multicast_xmit++;
lid = ah_attr->dlid &
~((1 << (dev->mkeyprot_resv_lmc & 7)) - 1);
if (unlikely(lid == dev->dd->ipath_lid)) {
- /*
- * Pass in an uninitialized ib_wc to save stack
- * space.
- */
- ipath_ud_loopback(qp, &ss, len, wr, &wc);
+ ipath_ud_loopback(qp, wqe);
goto done;
}
}
+
+ extra_bytes = -wqe->length & 3;
+ nwords = (wqe->length + extra_bytes) >> 2;
+
+ /* header size in 32-bit words LRH+BTH+DETH = (8+12+8)/4. */
+ qp->s_hdrwords = 7;
+ if (wqe->wr.opcode == IB_WR_SEND_WITH_IMM)
+ qp->s_hdrwords++;
+ qp->s_cur_size = wqe->length;
+ qp->s_cur_sge = &qp->s_sge;
+ qp->s_wqe = wqe;
+ qp->s_sge.sge = wqe->sg_list[0];
+ qp->s_sge.sg_list = wqe->sg_list + 1;
+ qp->s_sge.num_sge = wqe->wr.num_sge;
+
if (ah_attr->ah_flags & IB_AH_GRH) {
/* Header size in 32-bit words. */
- hwords = 17;
+ qp->s_hdrwords += ipath_make_grh(dev, &qp->s_hdr.u.l.grh,
+ &ah_attr->grh,
+ qp->s_hdrwords, nwords);
lrh0 = IPATH_LRH_GRH;
ohdr = &qp->s_hdr.u.l.oth;
- qp->s_hdr.u.l.grh.version_tclass_flow =
- cpu_to_be32((6 << 28) |
- (ah_attr->grh.traffic_class << 20) |
- ah_attr->grh.flow_label);
- qp->s_hdr.u.l.grh.paylen =
- cpu_to_be16(((wr->opcode ==
- IB_WR_SEND_WITH_IMM ? 6 : 5) +
- 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 = 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 =
- dev->dd->ipath_guid;
- qp->s_hdr.u.l.grh.dgid = ah_attr->grh.dgid;
/*
* Don't worry about sending to locally attached multicast
* QPs. It is unspecified by the spec. what happens.
*/
} else {
/* Header size in 32-bit words. */
- hwords = 7;
lrh0 = IPATH_LRH_BTH;
ohdr = &qp->s_hdr.u.oth;
}
- if (wr->opcode == IB_WR_SEND_WITH_IMM) {
- ohdr->u.ud.imm_data = wr->imm_data;
- wc.imm_data = wr->imm_data;
- hwords += 1;
+ if (wqe->wr.opcode == IB_WR_SEND_WITH_IMM) {
+ ohdr->u.ud.imm_data = wqe->wr.imm_data;
bth0 = IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE << 24;
- } else if (wr->opcode == IB_WR_SEND) {
- wc.imm_data = 0;
+ } else
bth0 = IB_OPCODE_UD_SEND_ONLY << 24;
- } else {
- ret = -EINVAL;
- goto bail;
- }
lrh0 |= ah_attr->sl << 4;
if (qp->ibqp.qp_type == IB_QPT_SMI)
lrh0 |= 0xF000; /* Set VL (see ch. 13.5.3.1) */
qp->s_hdr.lrh[0] = cpu_to_be16(lrh0);
qp->s_hdr.lrh[1] = cpu_to_be16(ah_attr->dlid); /* DEST LID */
- qp->s_hdr.lrh[2] = cpu_to_be16(hwords + nwords + SIZE_OF_CRC);
+ qp->s_hdr.lrh[2] = cpu_to_be16(qp->s_hdrwords + nwords +
+ SIZE_OF_CRC);
lid = dev->dd->ipath_lid;
if (lid) {
lid |= ah_attr->src_path_bits &
qp->s_hdr.lrh[3] = cpu_to_be16(lid);
} else
qp->s_hdr.lrh[3] = IB_LID_PERMISSIVE;
- if (wr->send_flags & IB_SEND_SOLICITED)
+ if (wqe->wr.send_flags & IB_SEND_SOLICITED)
bth0 |= 1 << 23;
bth0 |= extra_bytes << 20;
bth0 |= qp->ibqp.qp_type == IB_QPT_SMI ? IPATH_DEFAULT_P_KEY :
ohdr->bth[1] = ah_attr->dlid >= IPATH_MULTICAST_LID_BASE &&
ah_attr->dlid != IPATH_PERMISSIVE_LID ?
__constant_cpu_to_be32(IPATH_MULTICAST_QPN) :
- cpu_to_be32(wr->wr.ud.remote_qpn);
- /* XXX Could lose a PSN count but not worth locking */
+ cpu_to_be32(wqe->wr.wr.ud.remote_qpn);
ohdr->bth[2] = cpu_to_be32(qp->s_next_psn++ & IPATH_PSN_MASK);
/*
* Qkeys with the high order bit set mean use the
* qkey from the QP context instead of the WR (see 10.2.5).
*/
- ohdr->u.ud.deth[0] = cpu_to_be32((int)wr->wr.ud.remote_qkey < 0 ?
- qp->qkey : wr->wr.ud.remote_qkey);
+ ohdr->u.ud.deth[0] = cpu_to_be32((int)wqe->wr.wr.ud.remote_qkey < 0 ?
+ qp->qkey : wqe->wr.wr.ud.remote_qkey);
ohdr->u.ud.deth[1] = cpu_to_be32(qp->ibqp.qp_num);
- if (ipath_verbs_send(dev->dd, hwords, (u32 *) &qp->s_hdr,
- len, &ss))
- dev->n_no_piobuf++;
done:
- /* Queue the completion status entry. */
- if (!(qp->s_flags & IPATH_S_SIGNAL_REQ_WR) ||
- (wr->send_flags & IB_SEND_SIGNALED)) {
- wc.wr_id = wr->wr_id;
- wc.status = IB_WC_SUCCESS;
- wc.vendor_err = 0;
- wc.opcode = IB_WC_SEND;
- wc.byte_len = len;
- wc.qp = &qp->ibqp;
- wc.src_qp = 0;
- wc.wc_flags = 0;
- /* XXX initialize other fields? */
- ipath_cq_enter(to_icq(qp->ibqp.send_cq), &wc, 0);
- }
- kfree(sg_list);
-
- ret = 0;
+ if (++qp->s_cur >= qp->s_size)
+ qp->s_cur = 0;
+ ret = 1;
bail:
return ret;
*/
wc.dlid_path_bits = dlid >= IPATH_MULTICAST_LID_BASE ? 0 :
dlid & ((1 << (dev->mkeyprot_resv_lmc & 7)) - 1);
+ wc.port_num = 1;
/* Signal completion event if the solicited bit is set. */
ipath_cq_enter(to_icq(qp->ibqp.recv_cq), &wc,
(ohdr->bth[0] &
}
}
+/**
+ * ipath_post_one_send - post one RC, UC, or UD send work request
+ * @qp: the QP to post on
+ * @wr: the work request to send
+ */
+static int ipath_post_one_send(struct ipath_qp *qp, struct ib_send_wr *wr)
+{
+ struct ipath_swqe *wqe;
+ u32 next;
+ int i;
+ int j;
+ int acc;
+ int ret;
+ unsigned long flags;
+
+ spin_lock_irqsave(&qp->s_lock, flags);
+
+ /* Check that state is OK to post send. */
+ if (!(ib_ipath_state_ops[qp->state] & IPATH_POST_SEND_OK))
+ goto bail_inval;
+
+ /* IB spec says that num_sge == 0 is OK. */
+ if (wr->num_sge > qp->s_max_sge)
+ goto bail_inval;
+
+ /*
+ * Don't allow RDMA reads or atomic operations on UC or
+ * undefined operations.
+ * Make sure buffer is large enough to hold the result for atomics.
+ */
+ if (qp->ibqp.qp_type == IB_QPT_UC) {
+ if ((unsigned) wr->opcode >= IB_WR_RDMA_READ)
+ goto bail_inval;
+ } else if (qp->ibqp.qp_type == IB_QPT_UD) {
+ /* Check UD opcode */
+ if (wr->opcode != IB_WR_SEND &&
+ wr->opcode != IB_WR_SEND_WITH_IMM)
+ goto bail_inval;
+ /* Check UD destination address PD */
+ if (qp->ibqp.pd != wr->wr.ud.ah->pd)
+ goto bail_inval;
+ } else if ((unsigned) wr->opcode > IB_WR_ATOMIC_FETCH_AND_ADD)
+ goto bail_inval;
+ else if (wr->opcode >= IB_WR_ATOMIC_CMP_AND_SWP &&
+ (wr->num_sge == 0 ||
+ wr->sg_list[0].length < sizeof(u64) ||
+ wr->sg_list[0].addr & (sizeof(u64) - 1)))
+ goto bail_inval;
+ else if (wr->opcode >= IB_WR_RDMA_READ && !qp->s_max_rd_atomic)
+ goto bail_inval;
+
+ next = qp->s_head + 1;
+ if (next >= qp->s_size)
+ next = 0;
+ if (next == qp->s_last)
+ goto bail_inval;
+
+ wqe = get_swqe_ptr(qp, qp->s_head);
+ wqe->wr = *wr;
+ wqe->ssn = qp->s_ssn++;
+ wqe->length = 0;
+ if (wr->num_sge) {
+ acc = wr->opcode >= IB_WR_RDMA_READ ?
+ IB_ACCESS_LOCAL_WRITE : 0;
+ for (i = 0, j = 0; i < wr->num_sge; i++) {
+ u32 length = wr->sg_list[i].length;
+ int ok;
+
+ if (length == 0)
+ continue;
+ ok = ipath_lkey_ok(qp, &wqe->sg_list[j],
+ &wr->sg_list[i], acc);
+ if (!ok)
+ goto bail_inval;
+ wqe->length += length;
+ j++;
+ }
+ wqe->wr.num_sge = j;
+ }
+ if (qp->ibqp.qp_type == IB_QPT_UC ||
+ qp->ibqp.qp_type == IB_QPT_RC) {
+ if (wqe->length > 0x80000000U)
+ goto bail_inval;
+ } else if (wqe->length > to_idev(qp->ibqp.device)->dd->ipath_ibmtu)
+ goto bail_inval;
+ qp->s_head = next;
+
+ ret = 0;
+ goto bail;
+
+bail_inval:
+ ret = -EINVAL;
+bail:
+ spin_unlock_irqrestore(&qp->s_lock, flags);
+ return ret;
+}
+
/**
* ipath_post_send - post a send on a QP
* @ibqp: the QP to post the send on
struct ipath_qp *qp = to_iqp(ibqp);
int err = 0;
- /* Check that state is OK to post send. */
- if (!(ib_ipath_state_ops[qp->state] & IPATH_POST_SEND_OK)) {
- *bad_wr = wr;
- err = -EINVAL;
- goto bail;
- }
-
for (; wr; wr = wr->next) {
- switch (qp->ibqp.qp_type) {
- case IB_QPT_UC:
- case IB_QPT_RC:
- err = ipath_post_ruc_send(qp, wr);
- break;
-
- case IB_QPT_SMI:
- case IB_QPT_GSI:
- case IB_QPT_UD:
- err = ipath_post_ud_send(qp, wr);
- break;
-
- default:
- err = -EINVAL;
- }
+ err = ipath_post_one_send(qp, wr);
if (err) {
*bad_wr = wr;
- break;
+ goto bail;
}
}
+ /* Try to do the send work in the caller's context. */
+ ipath_do_send((unsigned long) qp);
+
bail:
return err;
}
u32 len = ss->sge.length;
u32 off;
- BUG_ON(len == 0);
if (len > length)
len = length;
if (len > ss->sge.sge_length)
len = ss->sge.sge_length;
+ BUG_ON(len == 0);
/* If the source address is not aligned, try to align it. */
off = (unsigned long)ss->sge.vaddr & (sizeof(u32) - 1);
if (off) {
__raw_writel(last, piobuf);
}
-/**
- * ipath_verbs_send - send a packet
- * @dd: the infinipath device
- * @hdrwords: the number of words in the header
- * @hdr: the packet header
- * @len: the length of the packet in bytes
- * @ss: the SGE to send
- */
-int ipath_verbs_send(struct ipath_devdata *dd, u32 hdrwords,
- u32 *hdr, u32 len, struct ipath_sge_state *ss)
+static int ipath_verbs_send_pio(struct ipath_qp *qp, u32 *hdr, u32 hdrwords,
+ struct ipath_sge_state *ss, u32 len,
+ u32 plen, u32 dwords)
{
+ struct ipath_devdata *dd = to_idev(qp->ibqp.device)->dd;
u32 __iomem *piobuf;
unsigned flush_wc;
- u32 plen;
int ret;
- /* +1 is for the qword padding of pbc */
- plen = hdrwords + ((len + 3) >> 2) + 1;
- if (unlikely((plen << 2) > dd->ipath_ibmaxlen)) {
- ret = -EINVAL;
- goto bail;
- }
-
- /* Get a PIO buffer to use. */
piobuf = ipath_getpiobuf(dd, NULL);
if (unlikely(piobuf == NULL)) {
ret = -EBUSY;
/* The common case is aligned and contained in one segment. */
if (likely(ss->num_sge == 1 && len <= ss->sge.length &&
!((unsigned long)ss->sge.vaddr & (sizeof(u32) - 1)))) {
- u32 dwords;
u32 *addr = (u32 *) ss->sge.vaddr;
/* Update address before sending packet. */
update_sge(ss, len);
- /* Need to round up for the last dword in the packet. */
- dwords = (len + 3) >> 2;
if (flush_wc) {
__iowrite32_copy(piobuf, addr, dwords - 1);
/* must flush early everything before trigger word */
}
copy_io(piobuf, ss, len, flush_wc);
done:
+ if (qp->s_wqe)
+ ipath_send_complete(qp, qp->s_wqe, IB_WC_SUCCESS);
ret = 0;
bail:
return ret;
}
+/**
+ * ipath_verbs_send - send a packet
+ * @qp: the QP to send on
+ * @hdr: the packet header
+ * @hdrwords: the number of words in the header
+ * @ss: the SGE to send
+ * @len: the length of the packet in bytes
+ */
+int ipath_verbs_send(struct ipath_qp *qp, struct ipath_ib_header *hdr,
+ u32 hdrwords, struct ipath_sge_state *ss, u32 len)
+{
+ u32 plen;
+ int ret;
+ u32 dwords = (len + 3) >> 2;
+
+ /* +1 is for the qword padding of pbc */
+ plen = hdrwords + dwords + 1;
+
+ ret = ipath_verbs_send_pio(qp, (u32 *) hdr, hdrwords,
+ ss, len, plen, dwords);
+
+ return ret;
+}
+
int ipath_snapshot_counters(struct ipath_devdata *dd, u64 *swords,
u64 *rwords, u64 *spkts, u64 *rpkts,
u64 *xmit_wait)
if (!(dd->ipath_flags & IPATH_INITTED)) {
/* no hardware, freeze, etc. */
- ipath_dbg("unit %u not usable\n", dd->ipath_unit);
ret = -EINVAL;
goto bail;
}
int ipath_get_counters(struct ipath_devdata *dd,
struct ipath_verbs_counters *cntrs)
{
+ struct ipath_cregs const *crp = dd->ipath_cregs;
int ret;
if (!(dd->ipath_flags & IPATH_INITTED)) {
/* no hardware, freeze, etc. */
- ipath_dbg("unit %u not usable\n", dd->ipath_unit);
ret = -EINVAL;
goto bail;
}
cntrs->symbol_error_counter =
- ipath_snap_cntr(dd, dd->ipath_cregs->cr_ibsymbolerrcnt);
+ ipath_snap_cntr(dd, crp->cr_ibsymbolerrcnt);
cntrs->link_error_recovery_counter =
- ipath_snap_cntr(dd, dd->ipath_cregs->cr_iblinkerrrecovcnt);
+ ipath_snap_cntr(dd, crp->cr_iblinkerrrecovcnt);
/*
* The link downed counter counts when the other side downs the
* connection. We add in the number of times we downed the link
* due to local link integrity errors to compensate.
*/
cntrs->link_downed_counter =
- ipath_snap_cntr(dd, dd->ipath_cregs->cr_iblinkdowncnt);
+ ipath_snap_cntr(dd, crp->cr_iblinkdowncnt);
cntrs->port_rcv_errors =
- ipath_snap_cntr(dd, dd->ipath_cregs->cr_rxdroppktcnt) +
- ipath_snap_cntr(dd, dd->ipath_cregs->cr_rcvovflcnt) +
- ipath_snap_cntr(dd, dd->ipath_cregs->cr_portovflcnt) +
- ipath_snap_cntr(dd, dd->ipath_cregs->cr_err_rlencnt) +
- ipath_snap_cntr(dd, dd->ipath_cregs->cr_invalidrlencnt) +
- ipath_snap_cntr(dd, dd->ipath_cregs->cr_erricrccnt) +
- ipath_snap_cntr(dd, dd->ipath_cregs->cr_errvcrccnt) +
- ipath_snap_cntr(dd, dd->ipath_cregs->cr_errlpcrccnt) +
- ipath_snap_cntr(dd, dd->ipath_cregs->cr_badformatcnt) +
+ ipath_snap_cntr(dd, crp->cr_rxdroppktcnt) +
+ ipath_snap_cntr(dd, crp->cr_rcvovflcnt) +
+ ipath_snap_cntr(dd, crp->cr_portovflcnt) +
+ ipath_snap_cntr(dd, crp->cr_err_rlencnt) +
+ ipath_snap_cntr(dd, crp->cr_invalidrlencnt) +
+ ipath_snap_cntr(dd, crp->cr_errlinkcnt) +
+ ipath_snap_cntr(dd, crp->cr_erricrccnt) +
+ ipath_snap_cntr(dd, crp->cr_errvcrccnt) +
+ ipath_snap_cntr(dd, crp->cr_errlpcrccnt) +
+ ipath_snap_cntr(dd, crp->cr_badformatcnt) +
dd->ipath_rxfc_unsupvl_errs;
cntrs->port_rcv_remphys_errors =
- ipath_snap_cntr(dd, dd->ipath_cregs->cr_rcvebpcnt);
- cntrs->port_xmit_discards =
- ipath_snap_cntr(dd, dd->ipath_cregs->cr_unsupvlcnt);
- cntrs->port_xmit_data =
- ipath_snap_cntr(dd, dd->ipath_cregs->cr_wordsendcnt);
- cntrs->port_rcv_data =
- ipath_snap_cntr(dd, dd->ipath_cregs->cr_wordrcvcnt);
- cntrs->port_xmit_packets =
- ipath_snap_cntr(dd, dd->ipath_cregs->cr_pktsendcnt);
- cntrs->port_rcv_packets =
- ipath_snap_cntr(dd, dd->ipath_cregs->cr_pktrcvcnt);
+ ipath_snap_cntr(dd, crp->cr_rcvebpcnt);
+ cntrs->port_xmit_discards = ipath_snap_cntr(dd, crp->cr_unsupvlcnt);
+ cntrs->port_xmit_data = ipath_snap_cntr(dd, crp->cr_wordsendcnt);
+ cntrs->port_rcv_data = ipath_snap_cntr(dd, crp->cr_wordrcvcnt);
+ cntrs->port_xmit_packets = ipath_snap_cntr(dd, crp->cr_pktsendcnt);
+ cntrs->port_rcv_packets = ipath_snap_cntr(dd, crp->cr_pktrcvcnt);
cntrs->local_link_integrity_errors =
(dd->ipath_flags & IPATH_GPIO_ERRINTRS) ?
dd->ipath_lli_errs : dd->ipath_lli_errors;
u8 port, struct ib_port_attr *props)
{
struct ipath_ibdev *dev = to_idev(ibdev);
+ struct ipath_devdata *dd = dev->dd;
enum ib_mtu mtu;
- u16 lid = dev->dd->ipath_lid;
+ u16 lid = dd->ipath_lid;
u64 ibcstat;
memset(props, 0, sizeof(*props));
props->lmc = dev->mkeyprot_resv_lmc & 7;
props->sm_lid = dev->sm_lid;
props->sm_sl = dev->sm_sl;
- ibcstat = dev->dd->ipath_lastibcstat;
+ ibcstat = dd->ipath_lastibcstat;
props->state = ((ibcstat >> 4) & 0x3) + 1;
/* See phys_state_show() */
props->phys_state = ipath_cvt_physportstate[
- dev->dd->ipath_lastibcstat & 0xf];
+ dd->ipath_lastibcstat & 0xf];
props->port_cap_flags = dev->port_cap_flags;
props->gid_tbl_len = 1;
props->max_msg_sz = 0x80000000;
- props->pkey_tbl_len = ipath_get_npkeys(dev->dd);
- props->bad_pkey_cntr = ipath_get_cr_errpkey(dev->dd) -
+ props->pkey_tbl_len = ipath_get_npkeys(dd);
+ props->bad_pkey_cntr = ipath_get_cr_errpkey(dd) -
dev->z_pkey_violations;
props->qkey_viol_cntr = dev->qkey_violations;
props->active_width = IB_WIDTH_4X;
props->init_type_reply = 0;
/*
- * Note: the chips support a maximum MTU of 4096, but the driver
+ * Note: the chip supports a maximum MTU of 4096, but the driver
* hasn't implemented this feature yet, so set the maximum value
* to 2048.
*/
props->max_mtu = IB_MTU_2048;
- switch (dev->dd->ipath_ibmtu) {
+ switch (dd->ipath_ibmtu) {
case 4096:
mtu = IB_MTU_4096;
break;
{
/* Disable GPIO bit 2 interrupt */
if (dd->ipath_flags & IPATH_GPIO_INTR) {
- u64 val;
/* Disable GPIO bit 2 interrupt */
- val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_gpio_mask);
dd->ipath_gpio_mask &= ~((u64) (1 << IPATH_GPIO_PORT0_BIT));
ipath_write_kreg(dd, dd->ipath_kregs->kr_gpio_mask,
dd->ipath_gpio_mask);
#include <rdma/ib_pack.h>
#include <rdma/ib_user_verbs.h>
+#include "ipath_kernel.h"
+
#define IPATH_MAX_RDMA_ATOMIC 4
#define QPN_MAX (1 << 24)
*/
#define IB_CQ_NONE (IB_CQ_NEXT_COMP + 1)
+/* AETH NAK opcode values */
#define IB_RNR_NAK 0x20
#define IB_NAK_PSN_ERROR 0x60
#define IB_NAK_INVALID_REQUEST 0x61
#define IB_NAK_REMOTE_OPERATIONAL_ERROR 0x63
#define IB_NAK_INVALID_RD_REQUEST 0x64
+/* Flags for checking QP state (see ib_ipath_state_ops[]) */
#define IPATH_POST_SEND_OK 0x01
#define IPATH_POST_RECV_OK 0x02
#define IPATH_PROCESS_RECV_OK 0x04
*/
struct ipath_sge {
struct ipath_mregion *mr;
- void *vaddr; /* current pointer into the segment */
+ void *vaddr; /* kernel virtual address of segment */
u32 sge_length; /* length of the SGE */
u32 length; /* remaining length of the segment */
u16 m; /* current index: mr->map[m] */
u32 s_ssn; /* SSN of tail entry */
u32 s_lsn; /* limit sequence number (credit) */
struct ipath_swqe *s_wq; /* send work queue */
+ struct ipath_swqe *s_wqe;
struct ipath_rq r_rq; /* receive work queue */
struct ipath_sge r_sg_list[0]; /* verified SGEs */
};
void ipath_get_credit(struct ipath_qp *qp, u32 aeth);
-int ipath_verbs_send(struct ipath_devdata *dd, u32 hdrwords,
- u32 *hdr, u32 len, struct ipath_sge_state *ss);
+int ipath_verbs_send(struct ipath_qp *qp, struct ipath_ib_header *hdr,
+ u32 hdrwords, struct ipath_sge_state *ss, u32 len);
void ipath_cq_enter(struct ipath_cq *cq, struct ib_wc *entry, int sig);
void ipath_skip_sge(struct ipath_sge_state *ss, u32 length);
-int ipath_post_ruc_send(struct ipath_qp *qp, struct ib_send_wr *wr);
-
void ipath_uc_rcv(struct ipath_ibdev *dev, struct ipath_ib_header *hdr,
int has_grh, void *data, u32 tlen, struct ipath_qp *qp);
int ipath_destroy_srq(struct ib_srq *ibsrq);
+void ipath_cq_enter(struct ipath_cq *cq, struct ib_wc *entry, int sig);
+
int ipath_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *entry);
struct ib_cq *ipath_create_cq(struct ib_device *ibdev, int entries, int comp_vector,
void ipath_insert_rnr_queue(struct ipath_qp *qp);
+int ipath_init_sge(struct ipath_qp *qp, struct ipath_rwqe *wqe,
+ u32 *lengthp, struct ipath_sge_state *ss);
+
int ipath_get_rwqe(struct ipath_qp *qp, int wr_id_only);
u32 ipath_make_grh(struct ipath_ibdev *dev, struct ib_grh *hdr,
struct ib_global_route *grh, u32 hwords, u32 nwords);
-void ipath_do_ruc_send(unsigned long data);
+void ipath_make_ruc_header(struct ipath_ibdev *dev, struct ipath_qp *qp,
+ struct ipath_other_headers *ohdr,
+ u32 bth0, u32 bth2);
+
+void ipath_do_send(unsigned long data);
+
+void ipath_send_complete(struct ipath_qp *qp, struct ipath_swqe *wqe,
+ enum ib_wc_status status);
+
+int ipath_make_rc_req(struct ipath_qp *qp);
-int ipath_make_rc_req(struct ipath_qp *qp, struct ipath_other_headers *ohdr,
- u32 pmtu, u32 *bth0p, u32 *bth2p);
+int ipath_make_uc_req(struct ipath_qp *qp);
-int ipath_make_uc_req(struct ipath_qp *qp, struct ipath_other_headers *ohdr,
- u32 pmtu, u32 *bth0p, u32 *bth2p);
+int ipath_make_ud_req(struct ipath_qp *qp);
int ipath_register_ib_device(struct ipath_devdata *);
projects / linux-2.6 / commitdiff