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IB/hfi1: Add 16B RC/UC support 

Add 16B bypass packet support for RC/UC traffic types.

Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Don Hiatt <don.hiatt@intel.com>
Signed-off-by: Dasaratharaman Chandramouli <dasaratharaman.chandramouli@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Don Hiatt 2017-08-04 13:54:41 -07:00 committed by Doug Ledford
parent 51e658f5dd
commit 5b6cabb0db
5 changed files with 464 additions and 212 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/infiniband/hw/hfi1/hfi.h
View File

@ -459,6 +459,8 @@ static inline u16 hfi1_16B_get_entropy(struct hfi1_16b_header *hdr)
return (u16)(hdr->lrh[3] & OPA_16B_ENTROPY_MASK);
}
#define OPA_16B_MAKE_QW(low_dw, high_dw) (((u64)(high_dw) << 32) | (low_dw))
/*
* BTH
*/
@ -1538,7 +1540,7 @@ static inline u32 egress_cycles(u32 len, u32 rate)
}
void set_link_ipg(struct hfi1_pportdata *ppd);
void process_becn(struct hfi1_pportdata *ppd, u8 sl, u16 rlid, u32 lqpn,
void process_becn(struct hfi1_pportdata *ppd, u8 sl, u32 rlid, u32 lqpn,
u32 rqpn, u8 svc_type);
void return_cnp(struct hfi1_ibport *ibp, struct rvt_qp *qp, u32 remote_qpn,
u32 pkey, u32 slid, u32 dlid, u8 sc5,

422
drivers/infiniband/hw/hfi1/rc.c
View File

@ -100,8 +100,12 @@ static int make_rc_ack(struct hfi1_ibdev *dev, struct rvt_qp *qp,
if (!(ib_rvt_state_ops[qp->state] & RVT_PROCESS_RECV_OK))
goto bail;
/* header size in 32-bit words LRH+BTH = (8+12)/4. */
hwords = 5;
if (priv->hdr_type == HFI1_PKT_TYPE_9B)
/* header size in 32-bit words LRH+BTH = (8+12)/4. */
hwords = 5;
else
/* header size in 32-bit words 16B LRH+BTH = (16+12)/4. */
hwords = 7;
switch (qp->s_ack_state) {
case OP(RDMA_READ_RESPONSE_LAST):
@ -258,8 +262,7 @@ int hfi1_make_rc_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps)
struct ib_other_headers *ohdr;
struct rvt_sge_state *ss;
struct rvt_swqe *wqe;
/* header size in 32-bit words LRH+BTH = (8+12)/4. */
u32 hwords = 5;
u32 hwords;
u32 len;
u32 bth0 = 0;
u32 bth2;
@ -273,9 +276,23 @@ int hfi1_make_rc_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps)
if (IS_ERR(ps->s_txreq))
goto bail_no_tx;
ohdr = &ps->s_txreq->phdr.hdr.ibh.u.oth;
if (rdma_ah_get_ah_flags(&qp->remote_ah_attr) & IB_AH_GRH)
ohdr = &ps->s_txreq->phdr.hdr.ibh.u.l.oth;
ps->s_txreq->phdr.hdr.hdr_type = priv->hdr_type;
if (priv->hdr_type == HFI1_PKT_TYPE_9B) {
/* header size in 32-bit words LRH+BTH = (8+12)/4. */
hwords = 5;
if (rdma_ah_get_ah_flags(&qp->remote_ah_attr) & IB_AH_GRH)
ohdr = &ps->s_txreq->phdr.hdr.ibh.u.l.oth;
else
ohdr = &ps->s_txreq->phdr.hdr.ibh.u.oth;
} else {
/* header size in 32-bit words 16B LRH+BTH = (16+12)/4. */
hwords = 7;
if ((rdma_ah_get_ah_flags(&qp->remote_ah_attr) & IB_AH_GRH) &&
(hfi1_check_mcast(rdma_ah_get_dlid(&qp->remote_ah_attr))))
ohdr = &ps->s_txreq->phdr.hdr.opah.u.l.oth;
else
ohdr = &ps->s_txreq->phdr.hdr.opah.u.oth;
}
/* Sending responses has higher priority over sending requests. */
if ((qp->s_flags & RVT_S_RESP_PENDING) &&
@ -703,114 +720,27 @@ bail_no_tx:
return 0;
}
/**
* hfi1_send_rc_ack - Construct an ACK packet and send it
* @qp: a pointer to the QP
*
* This is called from hfi1_rc_rcv() and handle_receive_interrupt().
* Note that RDMA reads and atomics are handled in the
* send side QP state and send engine.
*/
void hfi1_send_rc_ack(struct hfi1_ctxtdata *rcd, struct rvt_qp *qp,
int is_fecn)
static inline void hfi1_make_bth_aeth(struct rvt_qp *qp,
struct ib_other_headers *ohdr,
u32 bth0, u32 bth1)
{
struct hfi1_ibport *ibp = rcd_to_iport(rcd);
struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
u64 pbc, pbc_flags = 0;
u16 lrh0;
u16 sc5;
u32 bth0;
u32 hwords;
u32 vl, plen;
struct send_context *sc;
struct pio_buf *pbuf;
struct hfi1_opa_header opah;
struct ib_header *hdr;
struct ib_other_headers *ohdr;
unsigned long flags;
/* clear the defer count */
qp->r_adefered = 0;
/* Don't send ACK or NAK if a RDMA read or atomic is pending. */
if (qp->s_flags & RVT_S_RESP_PENDING)
goto queue_ack;
/* Ensure s_rdma_ack_cnt changes are committed */
smp_read_barrier_depends();
if (qp->s_rdma_ack_cnt)
goto queue_ack;
/* Construct the header */
opah.hdr_type = 0;
hdr = &opah.ibh;
/* header size in 32-bit words LRH+BTH+AETH = (8+12+4)/4 */
hwords = 6;
if (unlikely(rdma_ah_get_ah_flags(&qp->remote_ah_attr) & IB_AH_GRH)) {
hwords += hfi1_make_grh(ibp, &hdr->u.l.grh,
rdma_ah_read_grh(&qp->remote_ah_attr),
hwords, 0);
ohdr = &hdr->u.l.oth;
lrh0 = HFI1_LRH_GRH;
} else {
ohdr = &hdr->u.oth;
lrh0 = HFI1_LRH_BTH;
}
/* read pkey_index w/o lock (its atomic) */
bth0 = hfi1_get_pkey(ibp, qp->s_pkey_index) | (OP(ACKNOWLEDGE) << 24);
if (qp->s_mig_state == IB_MIG_MIGRATED)
bth0 |= IB_BTH_MIG_REQ;
if (qp->r_nak_state)
ohdr->u.aeth = cpu_to_be32((qp->r_msn & IB_MSN_MASK) |
(qp->r_nak_state <<
IB_AETH_CREDIT_SHIFT));
else
ohdr->u.aeth = rvt_compute_aeth(qp);
sc5 = ibp->sl_to_sc[rdma_ah_get_sl(&qp->remote_ah_attr)];
/* set PBC_DC_INFO bit (aka SC[4]) in pbc_flags */
pbc_flags |= (ib_is_sc5(sc5) << PBC_DC_INFO_SHIFT);
lrh0 |= (sc5 & 0xf) << 12 | (rdma_ah_get_sl(&qp->remote_ah_attr)
& 0xf) << 4;
hdr->lrh[0] = cpu_to_be16(lrh0);
hdr->lrh[1] = cpu_to_be16(rdma_ah_get_dlid(&qp->remote_ah_attr));
hdr->lrh[2] = cpu_to_be16(hwords + SIZE_OF_CRC);
hdr->lrh[3] = cpu_to_be16(ppd->lid |
rdma_ah_get_path_bits(&qp->remote_ah_attr));
ohdr->bth[0] = cpu_to_be32(bth0);
ohdr->bth[1] = cpu_to_be32(qp->remote_qpn);
ohdr->bth[1] |= cpu_to_be32((!!is_fecn) << IB_BECN_SHIFT);
ohdr->bth[1] = cpu_to_be32(bth1 | qp->remote_qpn);
ohdr->bth[2] = cpu_to_be32(mask_psn(qp->r_ack_psn));
}
/* Don't try to send ACKs if the link isn't ACTIVE */
if (driver_lstate(ppd) != IB_PORT_ACTIVE)
return;
static inline void hfi1_queue_rc_ack(struct rvt_qp *qp, bool is_fecn)
{
struct hfi1_ibport *ibp = to_iport(qp->ibqp.device, qp->port_num);
unsigned long flags;
sc = rcd->sc;
plen = 2 /* PBC */ + hwords;
vl = sc_to_vlt(ppd->dd, sc5);
pbc = create_pbc(ppd, pbc_flags, qp->srate_mbps, vl, plen);
pbuf = sc_buffer_alloc(sc, plen, NULL, NULL);
if (!pbuf) {
/*
* We have no room to send at the moment. Pass
* responsibility for sending the ACK to the send engine
* so that when enough buffer space becomes available,
* the ACK is sent ahead of other outgoing packets.
*/
goto queue_ack;
}
trace_ack_output_ibhdr(dd_from_ibdev(qp->ibqp.device),
&opah, ib_is_sc5(sc5));
/* write the pbc and data */
ppd->dd->pio_inline_send(ppd->dd, pbuf, pbc, hdr, hwords);
return;
queue_ack:
spin_lock_irqsave(&qp->s_lock, flags);
if (!(ib_rvt_state_ops[qp->state] & RVT_PROCESS_RECV_OK))
goto unlock;
@ -821,12 +751,194 @@ queue_ack:
if (is_fecn)
qp->s_flags |= RVT_S_ECN;
/* Schedule the send engine. */
/* Schedule the send tasklet. */
hfi1_schedule_send(qp);
unlock:
spin_unlock_irqrestore(&qp->s_lock, flags);
}
static inline void hfi1_make_rc_ack_9B(struct rvt_qp *qp,
struct hfi1_opa_header *opa_hdr,
u8 sc5, bool is_fecn,
u64 *pbc_flags, u32 *hwords,
u32 *nwords)
{
struct hfi1_ibport *ibp = to_iport(qp->ibqp.device, qp->port_num);
struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
struct ib_header *hdr = &opa_hdr->ibh;
struct ib_other_headers *ohdr;
u16 lrh0 = HFI1_LRH_BTH;
u16 pkey;
u32 bth0, bth1;
opa_hdr->hdr_type = HFI1_PKT_TYPE_9B;
ohdr = &hdr->u.oth;
/* header size in 32-bit words LRH+BTH+AETH = (8+12+4)/4 */
*hwords = 6;
if (unlikely(rdma_ah_get_ah_flags(&qp->remote_ah_attr) & IB_AH_GRH)) {
*hwords += hfi1_make_grh(ibp, &hdr->u.l.grh,
rdma_ah_read_grh(&qp->remote_ah_attr),
*hwords - 2, SIZE_OF_CRC);
ohdr = &hdr->u.l.oth;
lrh0 = HFI1_LRH_GRH;
}
/* set PBC_DC_INFO bit (aka SC[4]) in pbc_flags */
*pbc_flags |= ((!!(sc5 & 0x10)) << PBC_DC_INFO_SHIFT);
/* read pkey_index w/o lock (its atomic) */
pkey = hfi1_get_pkey(ibp, qp->s_pkey_index);
lrh0 |= (sc5 & IB_SC_MASK) << IB_SC_SHIFT |
(rdma_ah_get_sl(&qp->remote_ah_attr) & IB_SL_MASK) <<
IB_SL_SHIFT;
hfi1_make_ib_hdr(hdr, lrh0, *hwords + SIZE_OF_CRC,
opa_get_lid(rdma_ah_get_dlid(&qp->remote_ah_attr), 9B),
ppd->lid | rdma_ah_get_path_bits(&qp->remote_ah_attr));
bth0 = pkey | (OP(ACKNOWLEDGE) << 24);
if (qp->s_mig_state == IB_MIG_MIGRATED)
bth0 |= IB_BTH_MIG_REQ;
bth1 = (!!is_fecn) << IB_BECN_SHIFT;
hfi1_make_bth_aeth(qp, ohdr, bth0, bth1);
}
static inline void hfi1_make_rc_ack_16B(struct rvt_qp *qp,
struct hfi1_opa_header *opa_hdr,
u8 sc5, bool is_fecn,
u64 *pbc_flags, u32 *hwords,
u32 *nwords)
{
struct hfi1_ibport *ibp = to_iport(qp->ibqp.device, qp->port_num);
struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
struct hfi1_16b_header *hdr = &opa_hdr->opah;
struct ib_other_headers *ohdr;
u32 bth0, bth1;
u16 len, pkey;
u8 becn = !!is_fecn;
u8 l4 = OPA_16B_L4_IB_LOCAL;
u8 extra_bytes;
opa_hdr->hdr_type = HFI1_PKT_TYPE_16B;
ohdr = &hdr->u.oth;
/* header size in 32-bit words 16B LRH+BTH+AETH = (16+12+4)/4 */
*hwords = 8;
extra_bytes = hfi1_get_16b_padding(*hwords << 2, 0);
*nwords = SIZE_OF_CRC + ((extra_bytes + SIZE_OF_LT) >> 2);
if (unlikely(rdma_ah_get_ah_flags(&qp->remote_ah_attr) & IB_AH_GRH) &&
hfi1_check_mcast(rdma_ah_get_dlid(&qp->remote_ah_attr))) {
*hwords += hfi1_make_grh(ibp, &hdr->u.l.grh,
rdma_ah_read_grh(&qp->remote_ah_attr),
*hwords - 4, *nwords);
ohdr = &hdr->u.l.oth;
l4 = OPA_16B_L4_IB_GLOBAL;
}
*pbc_flags |= PBC_PACKET_BYPASS | PBC_INSERT_BYPASS_ICRC;
/* read pkey_index w/o lock (its atomic) */
pkey = hfi1_get_pkey(ibp, qp->s_pkey_index);
/* Convert dwords to flits */
len = (*hwords + *nwords) >> 1;
hfi1_make_16b_hdr(hdr,
ppd->lid | rdma_ah_get_path_bits(&qp->remote_ah_attr),
opa_get_lid(rdma_ah_get_dlid(&qp->remote_ah_attr),
16B),
len, pkey, becn, 0, l4, sc5);
bth0 = pkey | (OP(ACKNOWLEDGE) << 24);
bth0 |= extra_bytes << 20;
if (qp->s_mig_state == IB_MIG_MIGRATED)
bth1 = OPA_BTH_MIG_REQ;
hfi1_make_bth_aeth(qp, ohdr, bth0, bth1);
}
typedef void (*hfi1_make_rc_ack)(struct rvt_qp *qp,
struct hfi1_opa_header *opa_hdr,
u8 sc5, bool is_fecn,
u64 *pbc_flags, u32 *hwords,
u32 *nwords);
/* We support only two types - 9B and 16B for now */
static const hfi1_make_rc_ack hfi1_make_rc_ack_tbl[2] = {
[HFI1_PKT_TYPE_9B] = &hfi1_make_rc_ack_9B,
[HFI1_PKT_TYPE_16B] = &hfi1_make_rc_ack_16B
};
/**
* hfi1_send_rc_ack - Construct an ACK packet and send it
* @qp: a pointer to the QP
*
* This is called from hfi1_rc_rcv() and handle_receive_interrupt().
* Note that RDMA reads and atomics are handled in the
* send side QP state and send engine.
*/
void hfi1_send_rc_ack(struct hfi1_ctxtdata *rcd,
struct rvt_qp *qp, bool is_fecn)
{
struct hfi1_ibport *ibp = rcd_to_iport(rcd);
struct hfi1_qp_priv *priv = qp->priv;
struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
u8 sc5 = ibp->sl_to_sc[rdma_ah_get_sl(&qp->remote_ah_attr)];
u64 pbc, pbc_flags = 0;
u32 hwords = 0;
u32 nwords = 0;
u32 plen;
struct pio_buf *pbuf;
struct hfi1_opa_header opa_hdr;
/* clear the defer count */
qp->r_adefered = 0;
/* Don't send ACK or NAK if a RDMA read or atomic is pending. */
if (qp->s_flags & RVT_S_RESP_PENDING) {
hfi1_queue_rc_ack(qp, is_fecn);
return;
}
/* Ensure s_rdma_ack_cnt changes are committed */
smp_read_barrier_depends();
if (qp->s_rdma_ack_cnt) {
hfi1_queue_rc_ack(qp, is_fecn);
return;
}
/* Don't try to send ACKs if the link isn't ACTIVE */
if (driver_lstate(ppd) != IB_PORT_ACTIVE)
return;
/* Make the appropriate header */
hfi1_make_rc_ack_tbl[priv->hdr_type](qp, &opa_hdr, sc5, is_fecn,
&pbc_flags, &hwords, &nwords);
plen = 2 /* PBC */ + hwords + nwords;
pbc = create_pbc(ppd, pbc_flags, qp->srate_mbps,
sc_to_vlt(ppd->dd, sc5), plen);
pbuf = sc_buffer_alloc(rcd->sc, plen, NULL, NULL);
if (!pbuf) {
/*
* We have no room to send at the moment. Pass
* responsibility for sending the ACK to the send engine
* so that when enough buffer space becomes available,
* the ACK is sent ahead of other outgoing packets.
*/
hfi1_queue_rc_ack(qp, is_fecn);
return;
}
trace_ack_output_ibhdr(dd_from_ibdev(qp->ibqp.device),
&opa_hdr, ib_is_sc5(sc5));
/* write the pbc and data */
ppd->dd->pio_inline_send(ppd->dd, pbuf, pbc,
(priv->hdr_type == HFI1_PKT_TYPE_9B ?
(void *)&opa_hdr.ibh :
(void *)&opa_hdr.opah), hwords);
return;
}
/**
* reset_psn - reset the QP state to send starting from PSN
* @qp: the QP
@ -992,8 +1104,10 @@ static void reset_sending_psn(struct rvt_qp *qp, u32 psn)
void hfi1_rc_send_complete(struct rvt_qp *qp, struct hfi1_opa_header *opah)
{
struct ib_other_headers *ohdr;
struct ib_header *hdr = &opah->ibh;
struct hfi1_qp_priv *priv = qp->priv;
struct rvt_swqe *wqe;
struct ib_header *hdr = NULL;
struct hfi1_16b_header *hdr_16b = NULL;
u32 opcode;
u32 psn;
@ -1002,10 +1116,22 @@ void hfi1_rc_send_complete(struct rvt_qp *qp, struct hfi1_opa_header *opah)
return;
/* Find out where the BTH is */
if (ib_get_lnh(hdr) == HFI1_LRH_BTH)
ohdr = &hdr->u.oth;
else
ohdr = &hdr->u.l.oth;
if (priv->hdr_type == HFI1_PKT_TYPE_9B) {
hdr = &opah->ibh;
if (ib_get_lnh(hdr) == HFI1_LRH_BTH)
ohdr = &hdr->u.oth;
else
ohdr = &hdr->u.l.oth;
} else {
u8 l4;
hdr_16b = &opah->opah;
l4 = hfi1_16B_get_l4(hdr_16b);
if (l4 == OPA_16B_L4_IB_LOCAL)
ohdr = &hdr_16b->u.oth;
else
ohdr = &hdr_16b->u.l.oth;
}
opcode = ib_bth_get_opcode(ohdr);
if (opcode >= OP(RDMA_READ_RESPONSE_FIRST) &&
@ -1405,36 +1531,34 @@ static void rdma_seq_err(struct rvt_qp *qp, struct hfi1_ibport *ibp, u32 psn,
/**
* rc_rcv_resp - process an incoming RC response packet
* @ibp: the port this packet came in on
* @ohdr: the other headers for this packet
* @data: the packet data
* @tlen: the packet length
* @qp: the QP for this packet
* @opcode: the opcode for this packet
* @psn: the packet sequence number for this packet
* @hdrsize: the header length
* @pmtu: the path MTU
* @packet: data packet information
*
* This is called from hfi1_rc_rcv() to process an incoming RC response
* packet for the given QP.
* Called at interrupt level.
*/
static void rc_rcv_resp(struct hfi1_ibport *ibp,
struct ib_other_headers *ohdr,
void *data, u32 tlen, struct rvt_qp *qp,
u32 opcode, u32 psn, u32 hdrsize, u32 pmtu,
struct hfi1_ctxtdata *rcd)
static void rc_rcv_resp(struct hfi1_packet *packet)
{
struct hfi1_ctxtdata *rcd = packet->rcd;
void *data = packet->payload;
u32 tlen = packet->tlen;
struct rvt_qp *qp = packet->qp;
struct hfi1_ibport *ibp = to_iport(qp->ibqp.device, qp->port_num);
struct ib_other_headers *ohdr = packet->ohdr;
struct rvt_swqe *wqe;
enum ib_wc_status status;
unsigned long flags;
int diff;
u32 pad;
u32 aeth;
u64 val;
u32 aeth;
u32 psn = ib_bth_get_psn(packet->ohdr);
u32 pmtu = qp->pmtu;
u16 hdrsize = packet->hlen;
u8 opcode = packet->opcode;
u8 pad = packet->pad;
u8 extra_bytes = pad + packet->extra_byte + (SIZE_OF_CRC << 2);
spin_lock_irqsave(&qp->s_lock, flags);
trace_hfi1_ack(qp, psn);
/* Ignore invalid responses. */
@ -1500,7 +1624,7 @@ static void rc_rcv_resp(struct hfi1_ibport *ibp,
if (unlikely(wqe->wr.opcode != IB_WR_RDMA_READ))
goto ack_op_err;
read_middle:
if (unlikely(tlen != (hdrsize + pmtu + 4)))
if (unlikely(tlen != (hdrsize + pmtu + extra_bytes)))
goto ack_len_err;
if (unlikely(pmtu >= qp->s_rdma_read_len))
goto ack_len_err;
@ -1532,13 +1656,11 @@ read_middle:
aeth = be32_to_cpu(ohdr->u.aeth);
if (!do_rc_ack(qp, aeth, psn, opcode, 0, rcd))
goto ack_done;
/* Get the number of bytes the message was padded by. */
pad = ib_bth_get_pad(ohdr);
/*
* Check that the data size is >= 0 && <= pmtu.
* Remember to account for ICRC (4).
*/
if (unlikely(tlen < (hdrsize + pad + 4)))
if (unlikely(tlen < (hdrsize + extra_bytes)))
goto ack_len_err;
/*
* If this is a response to a resent RDMA read, we
@ -1556,16 +1678,14 @@ read_middle:
goto ack_seq_err;
if (unlikely(wqe->wr.opcode != IB_WR_RDMA_READ))
goto ack_op_err;
/* Get the number of bytes the message was padded by. */
pad = ib_bth_get_pad(ohdr);
/*
* Check that the data size is >= 1 && <= pmtu.
* Remember to account for ICRC (4).
*/
if (unlikely(tlen <= (hdrsize + pad + 4)))
if (unlikely(tlen <= (hdrsize + extra_bytes)))
goto ack_len_err;
read_last:
tlen -= hdrsize + pad + 4;
tlen -= hdrsize + extra_bytes;
if (unlikely(tlen != qp->s_rdma_read_len))
goto ack_len_err;
aeth = be32_to_cpu(ohdr->u.aeth);
@ -1850,7 +1970,7 @@ static void log_cca_event(struct hfi1_pportdata *ppd, u8 sl, u32 rlid,
spin_unlock_irqrestore(&ppd->cc_log_lock, flags);
}
void process_becn(struct hfi1_pportdata *ppd, u8 sl, u16 rlid, u32 lqpn,
void process_becn(struct hfi1_pportdata *ppd, u8 sl, u32 rlid, u32 lqpn,
u32 rqpn, u8 svc_type)
{
struct cca_timer *cca_timer;
@ -1907,12 +2027,7 @@ void process_becn(struct hfi1_pportdata *ppd, u8 sl, u16 rlid, u32 lqpn,
/**
* hfi1_rc_rcv - process an incoming RC packet
* @rcd: the context pointer
* @hdr: the header of this packet
* @rcv_flags: flags relevant to rcv processing
* @data: the packet data
* @tlen: the packet length
* @qp: the QP for this packet
* @packet: data packet information
*
* This is called from qp_rcv() to process an incoming RC packet
* for the given QP.
@ -1926,10 +2041,10 @@ void hfi1_rc_rcv(struct hfi1_packet *packet)
struct rvt_qp *qp = packet->qp;
struct hfi1_ibport *ibp = rcd_to_iport(rcd);
struct ib_other_headers *ohdr = packet->ohdr;
u32 bth0;
u32 bth0 = be32_to_cpu(ohdr->bth[0]);
u32 opcode = packet->opcode;
u32 hdrsize = packet->hlen;
u32 psn;
u32 psn = ib_bth_get_psn(packet->ohdr);
u32 pad = packet->pad;
struct ib_wc wc;
u32 pmtu = qp->pmtu;
@ -1940,15 +2055,14 @@ void hfi1_rc_rcv(struct hfi1_packet *packet)
bool is_fecn = false;
bool copy_last = false;
u32 rkey;
u8 extra_bytes = pad + packet->extra_byte + (SIZE_OF_CRC << 2);
lockdep_assert_held(&qp->r_lock);
bth0 = be32_to_cpu(ohdr->bth[0]);
if (hfi1_ruc_check_hdr(ibp, packet))
return;
is_fecn = process_ecn(qp, packet, false);
psn = ib_bth_get_psn(ohdr);
/*
* Process responses (ACKs) before anything else. Note that the
@ -1958,8 +2072,7 @@ void hfi1_rc_rcv(struct hfi1_packet *packet)
*/
if (opcode >= OP(RDMA_READ_RESPONSE_FIRST) &&
opcode <= OP(ATOMIC_ACKNOWLEDGE)) {
rc_rcv_resp(ibp, ohdr, data, tlen, qp, opcode, psn,
hdrsize, pmtu, rcd);
rc_rcv_resp(packet);
if (is_fecn)
goto send_ack;
return;
@ -2026,7 +2139,12 @@ void hfi1_rc_rcv(struct hfi1_packet *packet)
case OP(RDMA_WRITE_MIDDLE):
send_middle:
/* Check for invalid length PMTU or posted rwqe len. */
if (unlikely(tlen != (hdrsize + pmtu + 4)))
/*
* There will be no padding for 9B packet but 16B packets
* will come in with some padding since we always add
* CRC and LT bytes which will need to be flit aligned
*/
if (unlikely(tlen != (hdrsize + pmtu + extra_bytes)))
goto nack_inv;
qp->r_rcv_len += pmtu;
if (unlikely(qp->r_rcv_len > qp->r_len))
@ -2080,10 +2198,10 @@ no_immediate_data:
send_last:
/* Check for invalid length. */
/* LAST len should be >= 1 */
if (unlikely(tlen < (hdrsize + pad + 4)))
if (unlikely(tlen < (hdrsize + extra_bytes)))
goto nack_inv;
/* Don't count the CRC. */
tlen -= (hdrsize + pad + 4);
/* Don't count the CRC(and padding and LT byte for 16B). */
tlen -= (hdrsize + extra_bytes);
wc.byte_len = tlen + qp->r_rcv_len;
if (unlikely(wc.byte_len > qp->r_len))
goto nack_inv;

207
drivers/infiniband/hw/hfi1/ruc.c
View File

@ -735,32 +735,169 @@ static inline void build_ahg(struct rvt_qp *qp, u32 npsn)
}
}
static inline void hfi1_make_ruc_bth(struct rvt_qp *qp,
struct ib_other_headers *ohdr,
u32 bth0, u32 bth1, u32 bth2)
{
bth1 |= qp->remote_qpn;
ohdr->bth[0] = cpu_to_be32(bth0);
ohdr->bth[1] = cpu_to_be32(bth1);
ohdr->bth[2] = cpu_to_be32(bth2);
}
static inline void hfi1_make_ruc_header_16B(struct rvt_qp *qp,
struct ib_other_headers *ohdr,
u32 bth0, u32 bth2, int middle,
struct hfi1_pkt_state *ps)
{
struct hfi1_qp_priv *priv = qp->priv;
struct hfi1_ibport *ibp = ps->ibp;
struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
u32 bth1 = 0;
u32 slid;
u16 pkey = hfi1_get_pkey(ibp, qp->s_pkey_index);
u8 l4 = OPA_16B_L4_IB_LOCAL;
u8 extra_bytes = hfi1_get_16b_padding((qp->s_hdrwords << 2),
ps->s_txreq->s_cur_size);
u32 nwords = SIZE_OF_CRC + ((ps->s_txreq->s_cur_size +
extra_bytes + SIZE_OF_LT) >> 2);
u8 becn = 0;
if (unlikely(rdma_ah_get_ah_flags(&qp->remote_ah_attr) & IB_AH_GRH) &&
hfi1_check_mcast(rdma_ah_get_dlid(&qp->remote_ah_attr))) {
struct ib_grh *grh;
struct ib_global_route *grd =
rdma_ah_retrieve_grh(&qp->remote_ah_attr);
int hdrwords;
/*
* Ensure OPA GIDs are transformed to IB gids
* before creating the GRH.
*/
if (grd->sgid_index == OPA_GID_INDEX)
grd->sgid_index = 0;
grh = &ps->s_txreq->phdr.hdr.opah.u.l.grh;
l4 = OPA_16B_L4_IB_GLOBAL;
hdrwords = qp->s_hdrwords - 4;
qp->s_hdrwords += hfi1_make_grh(ibp, grh, grd,
hdrwords, nwords);
middle = 0;
}
if (qp->s_mig_state == IB_MIG_MIGRATED)
bth1 |= OPA_BTH_MIG_REQ;
else
middle = 0;
if (middle)
build_ahg(qp, bth2);
else
qp->s_flags &= ~RVT_S_AHG_VALID;
bth0 |= pkey;
bth0 |= extra_bytes << 20;
if (qp->s_flags & RVT_S_ECN) {
qp->s_flags &= ~RVT_S_ECN;
/* we recently received a FECN, so return a BECN */
becn = 1;
}
hfi1_make_ruc_bth(qp, ohdr, bth0, bth1, bth2);
if (!ppd->lid)
slid = be32_to_cpu(OPA_LID_PERMISSIVE);
else
slid = ppd->lid |
(rdma_ah_get_path_bits(&qp->remote_ah_attr) &
((1 << ppd->lmc) - 1));
hfi1_make_16b_hdr(&ps->s_txreq->phdr.hdr.opah,
slid,
opa_get_lid(rdma_ah_get_dlid(&qp->remote_ah_attr),
16B),
(qp->s_hdrwords + nwords) >> 1,
pkey, becn, 0, l4, priv->s_sc);
}
static inline void hfi1_make_ruc_header_9B(struct rvt_qp *qp,
struct ib_other_headers *ohdr,
u32 bth0, u32 bth2, int middle,
struct hfi1_pkt_state *ps)
{
struct hfi1_qp_priv *priv = qp->priv;
struct hfi1_ibport *ibp = ps->ibp;
struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
u32 bth1 = 0;
u16 pkey = hfi1_get_pkey(ibp, qp->s_pkey_index);
u16 lrh0 = HFI1_LRH_BTH;
u16 slid;
u8 extra_bytes = -ps->s_txreq->s_cur_size & 3;
u32 nwords = SIZE_OF_CRC + ((ps->s_txreq->s_cur_size +
extra_bytes) >> 2);
if (unlikely(rdma_ah_get_ah_flags(&qp->remote_ah_attr) & IB_AH_GRH)) {
struct ib_grh *grh = &ps->s_txreq->phdr.hdr.ibh.u.l.grh;
int hdrwords = qp->s_hdrwords - 2;
lrh0 = HFI1_LRH_GRH;
qp->s_hdrwords +=
hfi1_make_grh(ibp, grh,
rdma_ah_read_grh(&qp->remote_ah_attr),
hdrwords, nwords);
middle = 0;
}
lrh0 |= (priv->s_sc & 0xf) << 12 |
(rdma_ah_get_sl(&qp->remote_ah_attr) & 0xf) << 4;
if (qp->s_mig_state == IB_MIG_MIGRATED)
bth0 |= IB_BTH_MIG_REQ;
else
middle = 0;
if (middle)
build_ahg(qp, bth2);
else
qp->s_flags &= ~RVT_S_AHG_VALID;
bth0 |= pkey;
bth0 |= extra_bytes << 20;
if (qp->s_flags & RVT_S_ECN) {
qp->s_flags &= ~RVT_S_ECN;
/* we recently received a FECN, so return a BECN */
bth1 |= (IB_BECN_MASK << IB_BECN_SHIFT);
}
hfi1_make_ruc_bth(qp, ohdr, bth0, bth1, bth2);
if (!ppd->lid)
slid = be16_to_cpu(IB_LID_PERMISSIVE);
else
slid = ppd->lid |
(rdma_ah_get_path_bits(&qp->remote_ah_attr) &
((1 << ppd->lmc) - 1));
hfi1_make_ib_hdr(&ps->s_txreq->phdr.hdr.ibh,
lrh0,
qp->s_hdrwords + nwords,
opa_get_lid(rdma_ah_get_dlid(&qp->remote_ah_attr), 9B),
ppd_from_ibp(ibp)->lid |
rdma_ah_get_path_bits(&qp->remote_ah_attr));
}
typedef void (*hfi1_make_ruc_hdr)(struct rvt_qp *qp,
struct ib_other_headers *ohdr,
u32 bth0, u32 bth2, int middle,
struct hfi1_pkt_state *ps);
/* We support only two types - 9B and 16B for now */
static const hfi1_make_ruc_hdr hfi1_ruc_header_tbl[2] = {
[HFI1_PKT_TYPE_9B] = &hfi1_make_ruc_header_9B,
[HFI1_PKT_TYPE_16B] = &hfi1_make_ruc_header_16B
};
void hfi1_make_ruc_header(struct rvt_qp *qp, struct ib_other_headers *ohdr,
u32 bth0, u32 bth2, int middle,
struct hfi1_pkt_state *ps)
{
struct hfi1_qp_priv *priv = qp->priv;
struct hfi1_ibport *ibp = ps->ibp;
u16 lrh0;
u32 nwords;
u32 extra_bytes;
u32 bth1;
/* Construct the header. */
extra_bytes = -ps->s_txreq->s_cur_size & 3;
nwords = (ps->s_txreq->s_cur_size + extra_bytes) >> 2;
lrh0 = HFI1_LRH_BTH;
if (unlikely(rdma_ah_get_ah_flags(&qp->remote_ah_attr) & IB_AH_GRH)) {
qp->s_hdrwords +=
hfi1_make_grh(ibp,
&ps->s_txreq->phdr.hdr.ibh.u.l.grh,
&qp->remote_ah_attr.grh,
qp->s_hdrwords, nwords);
lrh0 = HFI1_LRH_GRH;
middle = 0;
}
lrh0 |= (priv->s_sc & 0xf) << 12 |
(rdma_ah_get_sl(&qp->remote_ah_attr) & 0xf) << 4;
/*
* reset s_ahg/AHG fields
*
@ -775,33 +912,9 @@ void hfi1_make_ruc_header(struct rvt_qp *qp, struct ib_other_headers *ohdr,
priv->s_ahg->tx_flags = 0;
priv->s_ahg->ahgcount = 0;
priv->s_ahg->ahgidx = 0;
if (qp->s_mig_state == IB_MIG_MIGRATED)
bth0 |= IB_BTH_MIG_REQ;
else
middle = 0;
if (middle)
build_ahg(qp, bth2);
else
qp->s_flags &= ~RVT_S_AHG_VALID;
ps->s_txreq->phdr.hdr.ibh.lrh[0] = cpu_to_be16(lrh0);
ps->s_txreq->phdr.hdr.ibh.lrh[1] =
cpu_to_be16(rdma_ah_get_dlid(&qp->remote_ah_attr));
ps->s_txreq->phdr.hdr.ibh.lrh[2] =
cpu_to_be16(qp->s_hdrwords + nwords + SIZE_OF_CRC);
ps->s_txreq->phdr.hdr.ibh.lrh[3] =
cpu_to_be16(ppd_from_ibp(ibp)->lid |
rdma_ah_get_path_bits(&qp->remote_ah_attr));
bth0 |= hfi1_get_pkey(ibp, qp->s_pkey_index);
bth0 |= extra_bytes << 20;
ohdr->bth[0] = cpu_to_be32(bth0);
bth1 = qp->remote_qpn;
if (qp->s_flags & RVT_S_ECN) {
qp->s_flags &= ~RVT_S_ECN;
/* we recently received a FECN, so return a BECN */
bth1 |= (IB_BECN_MASK << IB_BECN_SHIFT);
}
ohdr->bth[1] = cpu_to_be32(bth1);
ohdr->bth[2] = cpu_to_be32(bth2);
/* Make the appropriate header */
hfi1_ruc_header_tbl[priv->hdr_type](qp, ohdr, bth0, bth2, middle, ps);
}
/* when sending, force a reschedule every one of these periods */

40
drivers/infiniband/hw/hfi1/uc.c
View File

@ -65,7 +65,7 @@ int hfi1_make_uc_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps)
struct hfi1_qp_priv *priv = qp->priv;
struct ib_other_headers *ohdr;
struct rvt_swqe *wqe;
u32 hwords = 5;
u32 hwords;
u32 bth0 = 0;
u32 len;
u32 pmtu = qp->pmtu;
@ -93,9 +93,23 @@ int hfi1_make_uc_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps)
goto done_free_tx;
}
ohdr = &ps->s_txreq->phdr.hdr.ibh.u.oth;
if (rdma_ah_get_ah_flags(&qp->remote_ah_attr) & IB_AH_GRH)
ohdr = &ps->s_txreq->phdr.hdr.ibh.u.l.oth;
ps->s_txreq->phdr.hdr.hdr_type = priv->hdr_type;
if (priv->hdr_type == HFI1_PKT_TYPE_9B) {
/* header size in 32-bit words LRH+BTH = (8+12)/4. */
hwords = 5;
if (rdma_ah_get_ah_flags(&qp->remote_ah_attr) & IB_AH_GRH)
ohdr = &ps->s_txreq->phdr.hdr.ibh.u.l.oth;
else
ohdr = &ps->s_txreq->phdr.hdr.ibh.u.oth;
} else {
/* header size in 32-bit words 16B LRH+BTH = (16+12)/4. */
hwords = 7;
if ((rdma_ah_get_ah_flags(&qp->remote_ah_attr) & IB_AH_GRH) &&
(hfi1_check_mcast(rdma_ah_get_dlid(&qp->remote_ah_attr))))
ohdr = &ps->s_txreq->phdr.hdr.opah.u.l.oth;
else
ohdr = &ps->s_txreq->phdr.hdr.opah.u.oth;
}
/* Get the next send request. */
wqe = rvt_get_swqe_ptr(qp, qp->s_cur);
@ -309,6 +323,7 @@ void hfi1_uc_rcv(struct hfi1_packet *packet)
u32 pmtu = qp->pmtu;
struct ib_reth *reth;
int ret;
u8 extra_bytes = pad + packet->extra_byte + (SIZE_OF_CRC << 2);
if (hfi1_ruc_check_hdr(ibp, packet))
return;
@ -408,7 +423,12 @@ send_first:
/* FALLTHROUGH */
case OP(SEND_MIDDLE):
/* Check for invalid length PMTU or posted rwqe len. */
if (unlikely(tlen != (hdrsize + pmtu + 4)))
/*
* There will be no padding for 9B packet but 16B packets
* will come in with some padding since we always add
* CRC and LT bytes which will need to be flit aligned
*/
if (unlikely(tlen != (hdrsize + pmtu + extra_bytes)))
goto rewind;
qp->r_rcv_len += pmtu;
if (unlikely(qp->r_rcv_len > qp->r_len))
@ -428,10 +448,10 @@ no_immediate_data:
send_last:
/* Check for invalid length. */
/* LAST len should be >= 1 */
if (unlikely(tlen < (hdrsize + pad + 4)))
if (unlikely(tlen < (hdrsize + extra_bytes)))
goto rewind;
/* Don't count the CRC. */
tlen -= (hdrsize + pad + 4);
tlen -= (hdrsize + extra_bytes);
wc.byte_len = tlen + qp->r_rcv_len;
if (unlikely(wc.byte_len > qp->r_len))
goto rewind;
@ -524,7 +544,7 @@ rdma_last_imm:
if (unlikely(tlen < (hdrsize + pad + 4)))
goto drop;
/* Don't count the CRC. */
tlen -= (hdrsize + pad + 4);
tlen -= (hdrsize + extra_bytes);
if (unlikely(tlen + qp->r_rcv_len != qp->r_len))
goto drop;
if (test_and_clear_bit(RVT_R_REWIND_SGE, &qp->r_aflags)) {
@ -544,14 +564,12 @@ rdma_last_imm:
case OP(RDMA_WRITE_LAST):
rdma_last:
/* Get the number of bytes the message was padded by. */
pad = ib_bth_get_pad(ohdr);
/* Check for invalid length. */
/* LAST len should be >= 1 */
if (unlikely(tlen < (hdrsize + pad + 4)))
goto drop;
/* Don't count the CRC. */
tlen -= (hdrsize + pad + 4);
tlen -= (hdrsize + extra_bytes);
if (unlikely(tlen + qp->r_rcv_len != qp->r_len))
goto drop;
hfi1_copy_sge(&qp->r_sge, data, tlen, true, false);

3
drivers/infiniband/hw/hfi1/verbs.h
View File

@ -373,7 +373,8 @@ void hfi1_do_send(struct rvt_qp *qp, bool in_thread);
void hfi1_send_complete(struct rvt_qp *qp, struct rvt_swqe *wqe,
enum ib_wc_status status);
void hfi1_send_rc_ack(struct hfi1_ctxtdata *, struct rvt_qp *qp, int is_fecn);
void hfi1_send_rc_ack(struct hfi1_ctxtdata *rcd, struct rvt_qp *qp,
bool is_fecn);
int hfi1_make_rc_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps);