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IB/hfi1: Add support to receive 16B bypass packets

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We introduce a struct hfi1_16b_header to support 16B headers.
16B bypass packets are received by the driver and processed
similar to 9B packets. Add basic support to handle 16B packets.

Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Don Hiatt <don.hiatt@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 13:53:58 -07:00 committed by Doug Ledford
parent 13c1922288
commit 72c07e2b67
12 changed files with 274 additions and 51 deletions
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6
drivers/infiniband/hw/hfi1/chip.c
View File

@ -14468,6 +14468,7 @@ void hfi1_deinit_vnic_rsm(struct hfi1_devdata *dd)
static void init_rxe(struct hfi1_devdata *dd)
{
struct rsm_map_table *rmt;
u64 val;
/* enable all receive errors */
write_csr(dd, RCV_ERR_MASK, ~0ull);
@ -14492,6 +14493,11 @@ static void init_rxe(struct hfi1_devdata *dd)
* (64 bytes). Max_Payload_Size is possibly modified upward in
* tune_pcie_caps() which is called after this routine.
*/
/* Have 16 bytes (4DW) of bypass header available in header queue */
val = read_csr(dd, RCV_BYPASS);
val |= (4ull << 16);
write_csr(dd, RCV_BYPASS, val);
}
static void init_other(struct hfi1_devdata *dd)

1
drivers/infiniband/hw/hfi1/common.h
View File

@ -327,6 +327,7 @@ struct diag_pkt {
/* misc. */
#define SC15_PACKET 0xF
#define SIZE_OF_CRC 1
#define SIZE_OF_LT 1
#define LIM_MGMT_P_KEY 0x7FFF
#define FULL_MGMT_P_KEY 0xFFFF

127
drivers/infiniband/hw/hfi1/driver.c
View File

@ -237,6 +237,13 @@ static inline struct ib_header *hfi1_get_msgheader(struct hfi1_devdata *dd,
return (struct ib_header *)hfi1_get_header(dd, rhf_addr);
}
static inline struct hfi1_16b_header
*hfi1_get_16B_header(struct hfi1_devdata *dd,
__le32 *rhf_addr)
{
return (struct hfi1_16b_header *)hfi1_get_header(dd, rhf_addr);
}
/*
* Validate and encode the a given RcvArray Buffer size.
* The function will check whether the given size falls within
@ -925,6 +932,11 @@ static inline int set_armed_to_active(struct hfi1_ctxtdata *rcd,
struct ib_header *hdr = hfi1_get_msgheader(packet->rcd->dd,
packet->rhf_addr);
sc = hfi1_9B_get_sc5(hdr, packet->rhf);
} else if (etype == RHF_RCV_TYPE_BYPASS) {
struct hfi1_16b_header *hdr = hfi1_get_16B_header(
packet->rcd->dd,
packet->rhf_addr);
sc = hfi1_16B_get_sc(hdr);
}
if (sc != SC15_PACKET) {
int hwstate = driver_lstate(rcd->ppd);
@ -1386,9 +1398,14 @@ static int hfi1_setup_9B_packet(struct hfi1_packet *packet)
}
/* Query commonly used fields from packet header */
packet->payload = packet->ebuf;
packet->opcode = ib_bth_get_opcode(packet->ohdr);
packet->slid = ib_get_slid(hdr);
packet->dlid = ib_get_dlid(hdr);
if (unlikely((packet->dlid >= be16_to_cpu(IB_MULTICAST_LID_BASE)) &&
(packet->dlid != be16_to_cpu(IB_LID_PERMISSIVE))))
packet->dlid += opa_get_mcast_base(OPA_MCAST_NR) -
be16_to_cpu(IB_MULTICAST_LID_BASE);
packet->sl = ib_get_sl(hdr);
packet->sc = hfi1_9B_get_sc5(hdr, packet->rhf);
packet->pad = ib_bth_get_pad(packet->ohdr);
@ -1402,6 +1419,73 @@ drop:
return -EINVAL;
}
static int hfi1_setup_bypass_packet(struct hfi1_packet *packet)
{
/*
* Bypass packets have a different header/payload split
* compared to an IB packet.
* Current split is set such that 16 bytes of the actual
* header is in the header buffer and the remining is in
* the eager buffer. We chose 16 since hfi1 driver only
* supports 16B bypass packets and we will be able to
* receive the entire LRH with such a split.
*/
struct hfi1_ctxtdata *rcd = packet->rcd;
struct hfi1_pportdata *ppd = rcd->ppd;
struct hfi1_ibport *ibp = &ppd->ibport_data;
u8 l4;
u8 grh_len;
packet->hdr = (struct hfi1_16b_header *)
hfi1_get_16B_header(packet->rcd->dd,
packet->rhf_addr);
packet->hlen = (u8 *)packet->rhf_addr - (u8 *)packet->hdr;
l4 = hfi1_16B_get_l4(packet->hdr);
if (l4 == OPA_16B_L4_IB_LOCAL) {
grh_len = 0;
packet->ohdr = packet->ebuf;
packet->grh = NULL;
} else if (l4 == OPA_16B_L4_IB_GLOBAL) {
u32 vtf;
grh_len = sizeof(struct ib_grh);
packet->ohdr = packet->ebuf + grh_len;
packet->grh = packet->ebuf;
if (packet->grh->next_hdr != IB_GRH_NEXT_HDR)
goto drop;
vtf = be32_to_cpu(packet->grh->version_tclass_flow);
if ((vtf >> IB_GRH_VERSION_SHIFT) != IB_GRH_VERSION)
goto drop;
} else {
goto drop;
}
/* Query commonly used fields from packet header */
packet->opcode = ib_bth_get_opcode(packet->ohdr);
packet->hlen = hdr_len_by_opcode[packet->opcode] + 8 + grh_len;
packet->payload = packet->ebuf + packet->hlen - (4 * sizeof(u32));
packet->slid = hfi1_16B_get_slid(packet->hdr);
packet->dlid = hfi1_16B_get_dlid(packet->hdr);
if (unlikely(hfi1_is_16B_mcast(packet->dlid)))
packet->dlid += opa_get_mcast_base(OPA_MCAST_NR) -
opa_get_lid(opa_get_mcast_base(OPA_MCAST_NR),
16B);
packet->sc = hfi1_16B_get_sc(packet->hdr);
packet->sl = ibp->sc_to_sl[packet->sc];
packet->pad = hfi1_16B_bth_get_pad(packet->ohdr);
packet->extra_byte = SIZE_OF_LT;
packet->fecn = hfi1_16B_get_fecn(packet->hdr);
packet->becn = hfi1_16B_get_becn(packet->hdr);
return 0;
drop:
hfi1_cdbg(PKT, "%s: packet dropped\n", __func__);
ibp->rvp.n_pkt_drops++;
return -EINVAL;
}
void handle_eflags(struct hfi1_packet *packet)
{
struct hfi1_ctxtdata *rcd = packet->rcd;
@ -1464,8 +1548,8 @@ static inline bool hfi1_is_vnic_packet(struct hfi1_packet *packet)
if (packet->rcd->is_vnic)
return true;
if ((HFI1_GET_L2_TYPE(packet->ebuf) == OPA_VNIC_L2_TYPE) &&
(HFI1_GET_L4_TYPE(packet->ebuf) == OPA_VNIC_L4_ETHR))
if ((hfi1_16B_get_l2(packet->ebuf) == OPA_16B_L2_TYPE) &&
(hfi1_16B_get_l4(packet->ebuf) == OPA_16B_L4_ETHR))
return true;
return false;
@ -1475,25 +1559,38 @@ int process_receive_bypass(struct hfi1_packet *packet)
{
struct hfi1_devdata *dd = packet->rcd->dd;
if (unlikely(rhf_err_flags(packet->rhf))) {
handle_eflags(packet);
} else if (hfi1_is_vnic_packet(packet)) {
if (hfi1_is_vnic_packet(packet)) {
hfi1_vnic_bypass_rcv(packet);
return RHF_RCV_CONTINUE;
}
dd_dev_err(dd, "Unsupported bypass packet. Dropping\n");
incr_cntr64(&dd->sw_rcv_bypass_packet_errors);
if (!(dd->err_info_rcvport.status_and_code & OPA_EI_STATUS_SMASK)) {
u64 *flits = packet->ebuf;
if (hfi1_setup_bypass_packet(packet))
return RHF_RCV_CONTINUE;
if (flits && !(packet->rhf & RHF_LEN_ERR)) {
dd->err_info_rcvport.packet_flit1 = flits[0];
dd->err_info_rcvport.packet_flit2 =
packet->tlen > sizeof(flits[0]) ? flits[1] : 0;
if (unlikely(rhf_err_flags(packet->rhf))) {
handle_eflags(packet);
return RHF_RCV_CONTINUE;
}
if (hfi1_16B_get_l2(packet->hdr) == 0x2) {
hfi1_16B_rcv(packet);
} else {
dd_dev_err(dd,
"Bypass packets other than 16B are not supported in normal operation. Dropping\n");
incr_cntr64(&dd->sw_rcv_bypass_packet_errors);
if (!(dd->err_info_rcvport.status_and_code &
OPA_EI_STATUS_SMASK)) {
u64 *flits = packet->ebuf;
if (flits && !(packet->rhf & RHF_LEN_ERR)) {
dd->err_info_rcvport.packet_flit1 = flits[0];
dd->err_info_rcvport.packet_flit2 =
packet->tlen > sizeof(flits[0]) ?
flits[1] : 0;
}
dd->err_info_rcvport.status_and_code |=
(OPA_EI_STATUS_SMASK | BAD_L2_ERR);
}
dd->err_info_rcvport.status_and_code |=
(OPA_EI_STATUS_SMASK | BAD_L2_ERR);
}
return RHF_RCV_CONTINUE;
}

131
drivers/infiniband/hw/hfi1/hfi.h
View File

@ -66,6 +66,7 @@
#include <linux/i2c.h>
#include <linux/i2c-algo-bit.h>
#include <rdma/ib_hdrs.h>
#include <rdma/opa_addr.h>
#include <linux/rhashtable.h>
#include <linux/netdevice.h>
#include <rdma/rdma_vt.h>
@ -325,6 +326,7 @@ struct hfi1_ctxtdata {
struct hfi1_packet {
void *ebuf;
void *hdr;
void *payload;
struct hfi1_ctxtdata *rcd;
__le32 *rhf_addr;
struct rvt_qp *qp;
@ -351,6 +353,83 @@ struct hfi1_packet {
bool fecn;
};
/*
* OPA 16B Header
*/
#define OPA_16B_L4_MASK 0xFFull
#define OPA_16B_SC_MASK 0x1F00000ull
#define OPA_16B_SC_SHIFT 20
#define OPA_16B_LID_MASK 0xFFFFFull
#define OPA_16B_DLID_MASK 0xF000ull
#define OPA_16B_DLID_SHIFT 20
#define OPA_16B_DLID_HIGH_SHIFT 12
#define OPA_16B_SLID_MASK 0xF00ull
#define OPA_16B_SLID_SHIFT 20
#define OPA_16B_SLID_HIGH_SHIFT 8
#define OPA_16B_BECN_MASK 0x80000000ull
#define OPA_16B_BECN_SHIFT 31
#define OPA_16B_FECN_MASK 0x10000000ull
#define OPA_16B_FECN_SHIFT 28
#define OPA_16B_L2_MASK 0x60000000ull
#define OPA_16B_L2_SHIFT 29
/*
* OPA 16B L2/L4 Encodings
*/
#define OPA_16B_L2_TYPE 0x02
#define OPA_16B_L4_IB_LOCAL 0x09
#define OPA_16B_L4_IB_GLOBAL 0x0A
#define OPA_16B_L4_ETHR OPA_VNIC_L4_ETHR
static inline u8 hfi1_16B_get_l4(struct hfi1_16b_header *hdr)
{
return (u8)(hdr->lrh[2] & OPA_16B_L4_MASK);
}
static inline u8 hfi1_16B_get_sc(struct hfi1_16b_header *hdr)
{
return (u8)((hdr->lrh[1] & OPA_16B_SC_MASK) >> OPA_16B_SC_SHIFT);
}
static inline u32 hfi1_16B_get_dlid(struct hfi1_16b_header *hdr)
{
return (u32)((hdr->lrh[1] & OPA_16B_LID_MASK) |
(((hdr->lrh[2] & OPA_16B_DLID_MASK) >>
OPA_16B_DLID_HIGH_SHIFT) << OPA_16B_DLID_SHIFT));
}
static inline u32 hfi1_16B_get_slid(struct hfi1_16b_header *hdr)
{
return (u32)((hdr->lrh[0] & OPA_16B_LID_MASK) |
(((hdr->lrh[2] & OPA_16B_SLID_MASK) >>
OPA_16B_SLID_HIGH_SHIFT) << OPA_16B_SLID_SHIFT));
}
static inline u8 hfi1_16B_get_becn(struct hfi1_16b_header *hdr)
{
return (u8)((hdr->lrh[0] & OPA_16B_BECN_MASK) >> OPA_16B_BECN_SHIFT);
}
static inline u8 hfi1_16B_get_fecn(struct hfi1_16b_header *hdr)
{
return (u8)((hdr->lrh[1] & OPA_16B_FECN_MASK) >> OPA_16B_FECN_SHIFT);
}
static inline u8 hfi1_16B_get_l2(struct hfi1_16b_header *hdr)
{
return (u8)((hdr->lrh[1] & OPA_16B_L2_MASK) >> OPA_16B_L2_SHIFT);
}
/*
* BTH
*/
#define OPA_16B_BTH_PAD_MASK 7
static inline u8 hfi1_16B_bth_get_pad(struct ib_other_headers *ohdr)
{
return (u8)((be32_to_cpu(ohdr->bth[0]) >> IB_BTH_PAD_SHIFT) &
OPA_16B_BTH_PAD_MASK);
}
struct rvt_sge_state;
/*
@ -2084,11 +2163,55 @@ int hfi1_tempsense_rd(struct hfi1_devdata *dd, struct hfi1_temp *temp);
/*
* hfi1_check_mcast- Check if the given lid is
* in the IB multicast range.
* in the OPA multicast range.
*
* The LID might either reside in ah.dlid or might be
* in the GRH of the address handle as DGID if extended
* addresses are in use.
*/
static inline bool hfi1_check_mcast(u16 lid)
static inline bool hfi1_check_mcast(u32 lid)
{
return ((lid >= be16_to_cpu(IB_MULTICAST_LID_BASE)) &&
(lid != be16_to_cpu(IB_LID_PERMISSIVE)));
return ((lid >= opa_get_mcast_base(OPA_MCAST_NR)) &&
(lid != be32_to_cpu(OPA_LID_PERMISSIVE)));
}
#define opa_get_lid(lid, format) \
__opa_get_lid(lid, OPA_PORT_PACKET_FORMAT_##format)
/* Convert a lid to a specific lid space */
static inline u32 __opa_get_lid(u32 lid, u8 format)
{
bool is_mcast = hfi1_check_mcast(lid);
switch (format) {
case OPA_PORT_PACKET_FORMAT_8B:
case OPA_PORT_PACKET_FORMAT_10B:
if (is_mcast)
return (lid - opa_get_mcast_base(OPA_MCAST_NR) +
0xF0000);
return lid & 0xFFFFF;
case OPA_PORT_PACKET_FORMAT_16B:
if (is_mcast)
return (lid - opa_get_mcast_base(OPA_MCAST_NR) +
0xF00000);
return lid & 0xFFFFFF;
case OPA_PORT_PACKET_FORMAT_9B:
if (is_mcast)
return (lid -
opa_get_mcast_base(OPA_MCAST_NR) +
be16_to_cpu(IB_MULTICAST_LID_BASE));
else
return lid & 0xFFFF;
default:
return lid;
}
}
/* Return true if the given lid is the OPA 16B multicast range */
static inline bool hfi1_is_16B_mcast(u32 lid)
{
return ((lid >=
opa_get_lid(opa_get_mcast_base(OPA_MCAST_NR), 16B)) &&
(lid != opa_get_lid(be32_to_cpu(OPA_LID_PERMISSIVE), 16B)));
}
#endif /* _HFI1_KERNEL_H */

2
drivers/infiniband/hw/hfi1/rc.c
View File

@ -1916,7 +1916,7 @@ void process_becn(struct hfi1_pportdata *ppd, u8 sl, u16 rlid, u32 lqpn,
void hfi1_rc_rcv(struct hfi1_packet *packet)
{
struct hfi1_ctxtdata *rcd = packet->rcd;
void *data = packet->ebuf;
void *data = packet->payload;
u32 tlen = packet->tlen;
struct rvt_qp *qp = packet->qp;
struct hfi1_ibport *ibp = rcd_to_iport(rcd);

2
drivers/infiniband/hw/hfi1/uc.c
View File

@ -297,7 +297,7 @@ bail_no_tx:
void hfi1_uc_rcv(struct hfi1_packet *packet)
{
struct hfi1_ibport *ibp = rcd_to_iport(packet->rcd);
void *data = packet->ebuf;
void *data = packet->payload;
u32 tlen = packet->tlen;
struct rvt_qp *qp = packet->qp;
struct ib_other_headers *ohdr = packet->ohdr;

4
drivers/infiniband/hw/hfi1/ud.c
View File

@ -667,11 +667,10 @@ void hfi1_ud_rcv(struct hfi1_packet *packet)
struct hfi1_ibport *ibp = rcd_to_iport(packet->rcd);
struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
struct ib_header *hdr = packet->hdr;
void *data = packet->ebuf;
void *data = packet->payload;
u32 tlen = packet->tlen;
struct rvt_qp *qp = packet->qp;
u8 sc5 = hfi1_9B_get_sc5(hdr, packet->rhf);
u32 bth1;
u8 sl_from_sc;
u8 extra_bytes = packet->pad;
u8 opcode = packet->opcode;
@ -679,7 +678,6 @@ void hfi1_ud_rcv(struct hfi1_packet *packet)
u32 dlid = packet->dlid;
u32 slid = packet->slid;
bth1 = be32_to_cpu(ohdr->bth[1]);
qkey = ib_get_qkey(ohdr);
src_qp = ib_get_sqpn(ohdr);
pkey = ib_bth_get_pkey(ohdr);

17
drivers/infiniband/hw/hfi1/verbs.c
View File

@ -571,7 +571,7 @@ static inline void hfi1_handle_packet(struct hfi1_packet *packet,
goto drop;
mcast = rvt_mcast_find(&ibp->rvp,
&packet->grh->dgid,
packet->dlid);
opa_get_lid(packet->dlid, 9B));
if (!mcast)
goto drop;
list_for_each_entry_rcu(p, &mcast->qp_list, list) {
@ -627,14 +627,17 @@ drop:
void hfi1_ib_rcv(struct hfi1_packet *packet)
{
struct hfi1_ctxtdata *rcd = packet->rcd;
bool is_mcast = false;
if (unlikely(hfi1_check_mcast(packet->dlid)))
is_mcast = true;
trace_input_ibhdr(rcd->dd, packet, !!(rhf_dc_info(packet->rhf)));
hfi1_handle_packet(packet, hfi1_check_mcast(packet->dlid));
}
trace_input_ibhdr(rcd->dd, packet,
!!(packet->rhf & RHF_DC_INFO_SMASK));
hfi1_handle_packet(packet, is_mcast);
void hfi1_16B_rcv(struct hfi1_packet *packet)
{
struct hfi1_ctxtdata *rcd = packet->rcd;
trace_input_ibhdr(rcd->dd, packet, false);
hfi1_handle_packet(packet, hfi1_check_mcast(packet->dlid));
}
/*

13
drivers/infiniband/hw/hfi1/verbs.h
View File

@ -104,6 +104,17 @@ enum {
HFI1_HAS_GRH = (1 << 0),
};
struct hfi1_16b_header {
u32 lrh[4];
union {
struct {
struct ib_grh grh;
struct ib_other_headers oth;
} l;
struct ib_other_headers oth;
} u;
} __packed;
struct hfi1_ahg_info {
u32 ahgdesc[2];
u16 tx_flags;
@ -378,6 +389,8 @@ void hfi1_unregister_ib_device(struct hfi1_devdata *);
void hfi1_ib_rcv(struct hfi1_packet *packet);
void hfi1_16B_rcv(struct hfi1_packet *packet);
unsigned hfi1_get_npkeys(struct hfi1_devdata *);
int hfi1_verbs_send_dma(struct rvt_qp *qp, struct hfi1_pkt_state *ps,

15
drivers/infiniband/hw/hfi1/vnic.h
View File

@ -54,21 +54,6 @@
#define HFI1_VNIC_MAX_TXQ 16
#define HFI1_VNIC_MAX_PAD 12
/* L2 header definitions */
#define HFI1_L2_TYPE_OFFSET 0x7
#define HFI1_L2_TYPE_SHFT 0x5
#define HFI1_L2_TYPE_MASK 0x3
#define HFI1_GET_L2_TYPE(hdr) \
((*((u8 *)(hdr) + HFI1_L2_TYPE_OFFSET) >> HFI1_L2_TYPE_SHFT) & \
HFI1_L2_TYPE_MASK)
/* L4 type definitions */
#define HFI1_L4_TYPE_OFFSET 8
#define HFI1_GET_L4_TYPE(data) \
(*((u8 *)(data) + HFI1_L4_TYPE_OFFSET))
/* L4 header definitions */
#define HFI1_VNIC_L4_HDR_OFFSET OPA_VNIC_L2_HDR_LEN

4
drivers/infiniband/hw/hfi1/vnic_main.c
View File

@ -564,8 +564,8 @@ void hfi1_vnic_bypass_rcv(struct hfi1_packet *packet)
int l4_type, vesw_id = -1;
u8 q_idx;
l4_type = HFI1_GET_L4_TYPE(packet->ebuf);
if (likely(l4_type == OPA_VNIC_L4_ETHR)) {
l4_type = hfi1_16B_get_l4(packet->ebuf);
if (likely(l4_type == OPA_16B_L4_ETHR)) {
vesw_id = HFI1_VNIC_GET_VESWID(packet->ebuf);
vinfo = idr_find(&dd->vnic.vesw_idr, vesw_id);

3
include/rdma/opa_vnic.h
View File

@ -54,9 +54,6 @@
#include <rdma/ib_verbs.h>
/* VNIC uses 16B header format */
#define OPA_VNIC_L2_TYPE 0x2
/* 16 header bytes + 2 reserved bytes */
#define OPA_VNIC_L2_HDR_LEN (16 + 2)