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Date: Fri, 5 Aug 2022 07:46:16 +0000
From: Li Zhijian <lizhijian@...itsu.com>
To: Jason Gunthorpe <jgg@...pe.ca>, Zhu Yanjun <zyjzyj2000@...il.com>,
"Leon Romanovsky" <leon@...nel.org>, <linux-rdma@...r.kernel.org>
CC: Xiao Yang <yangx.jy@...itsu.com>, <y-goto@...itsu.com>,
Bob Pearson <rpearsonhpe@...il.com>,
Mark Bloch <mbloch@...dia.com>,
Aharon Landau <aharonl@...dia.com>,
Tom Talpey <tom@...pey.com>, <tomasz.gromadzki@...el.com>,
Dan Williams <dan.j.williams@...el.com>,
<linux-kernel@...r.kernel.org>, Li Zhijian <lizhijian@...itsu.com>
Subject: [PATCH v4 3/6] RDMA/rxe: Implement RC RDMA FLUSH service in requester side
We implement new packet for FLUSH request.
Signed-off-by: Li Zhijian <lizhijian@...itsu.com>
---
V4: Remove flush union for legecy API, add WR_FLUSH_MASK
V3: Fix sparse: incorrect type in assignment; Reported-by: kernel test robot <lkp@...el.com>
V2: extend flush to include length field.
---
drivers/infiniband/sw/rxe/rxe_hdr.h | 20 ++++++++++++++++++++
drivers/infiniband/sw/rxe/rxe_opcode.c | 21 +++++++++++++++++++++
drivers/infiniband/sw/rxe/rxe_opcode.h | 4 ++++
drivers/infiniband/sw/rxe/rxe_req.c | 15 ++++++++++++++-
include/rdma/ib_pack.h | 2 ++
include/rdma/ib_verbs.h | 1 +
include/uapi/rdma/ib_user_verbs.h | 1 +
include/uapi/rdma/rdma_user_rxe.h | 7 +++++++
8 files changed, 70 insertions(+), 1 deletion(-)
diff --git a/drivers/infiniband/sw/rxe/rxe_hdr.h b/drivers/infiniband/sw/rxe/rxe_hdr.h
index e432f9e37795..8063b5018445 100644
--- a/drivers/infiniband/sw/rxe/rxe_hdr.h
+++ b/drivers/infiniband/sw/rxe/rxe_hdr.h
@@ -607,6 +607,25 @@ static inline void reth_set_len(struct rxe_pkt_info *pkt, u32 len)
rxe_opcode[pkt->opcode].offset[RXE_RETH], len);
}
+/*
+ * FLUSH Extended Transport Header
+ */
+#define FETH_PLT_SHIFT 0UL
+#define FETH_SEL_SHIFT 4UL
+#define FETH_RESERVED_SHIFT 6UL
+#define FETH_PLT_MASK ((1UL << FETH_SEL_SHIFT) - 1UL)
+#define FETH_SEL_MASK (~FETH_PLT_MASK & ((1UL << FETH_RESERVED_SHIFT) - 1UL))
+
+static inline void feth_init(struct rxe_pkt_info *pkt, u8 type, u8 level)
+{
+ __be32 *p = (__be32 *)
+ (pkt->hdr + rxe_opcode[pkt->opcode].offset[RXE_FETH]);
+ u32 feth = ((level << FETH_SEL_SHIFT) & FETH_SEL_MASK) |
+ ((type << FETH_PLT_SHIFT) & FETH_PLT_MASK);
+
+ *p = cpu_to_be32(feth);
+}
+
/******************************************************************************
* Atomic Extended Transport Header
******************************************************************************/
@@ -910,6 +929,7 @@ enum rxe_hdr_length {
RXE_ATMETH_BYTES = sizeof(struct rxe_atmeth),
RXE_IETH_BYTES = sizeof(struct rxe_ieth),
RXE_RDETH_BYTES = sizeof(struct rxe_rdeth),
+ RXE_FETH_BYTES = sizeof(u32),
};
static inline size_t header_size(struct rxe_pkt_info *pkt)
diff --git a/drivers/infiniband/sw/rxe/rxe_opcode.c b/drivers/infiniband/sw/rxe/rxe_opcode.c
index d4ba4d506f17..45dc752bd31a 100644
--- a/drivers/infiniband/sw/rxe/rxe_opcode.c
+++ b/drivers/infiniband/sw/rxe/rxe_opcode.c
@@ -101,6 +101,12 @@ struct rxe_wr_opcode_info rxe_wr_opcode_info[] = {
[IB_QPT_UC] = WR_LOCAL_OP_MASK,
},
},
+ [IB_WR_RDMA_FLUSH] = {
+ .name = "IB_WR_RDMA_FLUSH",
+ .mask = {
+ [IB_QPT_RC] = WR_FLUSH_MASK,
+ },
+ },
};
struct rxe_opcode_info rxe_opcode[RXE_NUM_OPCODE] = {
@@ -314,6 +320,21 @@ struct rxe_opcode_info rxe_opcode[RXE_NUM_OPCODE] = {
RXE_AETH_BYTES,
}
},
+ [IB_OPCODE_RC_RDMA_FLUSH] = {
+ .name = "IB_OPCODE_RC_RDMA_FLUSH",
+ .mask = RXE_FETH_MASK | RXE_RETH_MASK | RXE_FLUSH_MASK |
+ RXE_START_MASK | RXE_END_MASK | RXE_REQ_MASK,
+ .length = RXE_BTH_BYTES + RXE_FETH_BYTES + RXE_RETH_BYTES,
+ .offset = {
+ [RXE_BTH] = 0,
+ [RXE_FETH] = RXE_BTH_BYTES,
+ [RXE_RETH] = RXE_BTH_BYTES +
+ RXE_FETH_BYTES,
+ [RXE_PAYLOAD] = RXE_BTH_BYTES +
+ RXE_FETH_BYTES +
+ RXE_RETH_BYTES,
+ }
+ },
[IB_OPCODE_RC_ATOMIC_ACKNOWLEDGE] = {
.name = "IB_OPCODE_RC_ATOMIC_ACKNOWLEDGE",
.mask = RXE_AETH_MASK | RXE_ATMACK_MASK | RXE_ACK_MASK |
diff --git a/drivers/infiniband/sw/rxe/rxe_opcode.h b/drivers/infiniband/sw/rxe/rxe_opcode.h
index 8f9aaaf260f2..9274c2016339 100644
--- a/drivers/infiniband/sw/rxe/rxe_opcode.h
+++ b/drivers/infiniband/sw/rxe/rxe_opcode.h
@@ -20,6 +20,7 @@ enum rxe_wr_mask {
WR_READ_MASK = BIT(3),
WR_WRITE_MASK = BIT(4),
WR_LOCAL_OP_MASK = BIT(5),
+ WR_FLUSH_MASK = BIT(6),
WR_READ_OR_WRITE_MASK = WR_READ_MASK | WR_WRITE_MASK,
WR_WRITE_OR_SEND_MASK = WR_WRITE_MASK | WR_SEND_MASK,
@@ -48,6 +49,7 @@ enum rxe_hdr_type {
RXE_DETH,
RXE_IMMDT,
RXE_PAYLOAD,
+ RXE_FETH,
NUM_HDR_TYPES
};
@@ -63,6 +65,7 @@ enum rxe_hdr_mask {
RXE_IETH_MASK = BIT(RXE_IETH),
RXE_RDETH_MASK = BIT(RXE_RDETH),
RXE_DETH_MASK = BIT(RXE_DETH),
+ RXE_FETH_MASK = BIT(RXE_FETH),
RXE_PAYLOAD_MASK = BIT(RXE_PAYLOAD),
RXE_REQ_MASK = BIT(NUM_HDR_TYPES + 0),
@@ -80,6 +83,7 @@ enum rxe_hdr_mask {
RXE_END_MASK = BIT(NUM_HDR_TYPES + 10),
RXE_LOOPBACK_MASK = BIT(NUM_HDR_TYPES + 12),
+ RXE_FLUSH_MASK = BIT(NUM_HDR_TYPES + 13),
RXE_READ_OR_ATOMIC_MASK = (RXE_READ_MASK | RXE_ATOMIC_MASK),
RXE_WRITE_OR_SEND_MASK = (RXE_WRITE_MASK | RXE_SEND_MASK),
diff --git a/drivers/infiniband/sw/rxe/rxe_req.c b/drivers/infiniband/sw/rxe/rxe_req.c
index f63771207970..2f0161b90fa7 100644
--- a/drivers/infiniband/sw/rxe/rxe_req.c
+++ b/drivers/infiniband/sw/rxe/rxe_req.c
@@ -241,6 +241,9 @@ static int next_opcode_rc(struct rxe_qp *qp, u32 opcode, int fits)
IB_OPCODE_RC_SEND_ONLY_WITH_IMMEDIATE :
IB_OPCODE_RC_SEND_FIRST;
+ case IB_WR_RDMA_FLUSH:
+ return IB_OPCODE_RC_RDMA_FLUSH;
+
case IB_WR_RDMA_READ:
return IB_OPCODE_RC_RDMA_READ_REQUEST;
@@ -421,11 +424,18 @@ static struct sk_buff *init_req_packet(struct rxe_qp *qp,
/* init optional headers */
if (pkt->mask & RXE_RETH_MASK) {
- reth_set_rkey(pkt, ibwr->wr.rdma.rkey);
+ if (pkt->mask & RXE_FETH_MASK)
+ reth_set_rkey(pkt, ibwr->wr.flush.rkey);
+ else
+ reth_set_rkey(pkt, ibwr->wr.rdma.rkey);
reth_set_va(pkt, wqe->iova);
reth_set_len(pkt, wqe->dma.resid);
}
+ /* Fill Flush Extension Transport Header */
+ if (pkt->mask & RXE_FETH_MASK)
+ feth_init(pkt, ibwr->wr.flush.type, ibwr->wr.flush.level);
+
if (pkt->mask & RXE_IMMDT_MASK)
immdt_set_imm(pkt, ibwr->ex.imm_data);
@@ -484,6 +494,9 @@ static int finish_packet(struct rxe_qp *qp, struct rxe_av *av,
memset(pad, 0, bth_pad(pkt));
}
+ } else if (pkt->mask & RXE_FLUSH_MASK) {
+ /* oA19-2: shall have no payload. */
+ wqe->dma.resid = 0;
}
return 0;
diff --git a/include/rdma/ib_pack.h b/include/rdma/ib_pack.h
index a9162f25beaf..d19edb502de6 100644
--- a/include/rdma/ib_pack.h
+++ b/include/rdma/ib_pack.h
@@ -84,6 +84,7 @@ enum {
/* opcode 0x15 is reserved */
IB_OPCODE_SEND_LAST_WITH_INVALIDATE = 0x16,
IB_OPCODE_SEND_ONLY_WITH_INVALIDATE = 0x17,
+ IB_OPCODE_RDMA_FLUSH = 0x1C,
/* real constants follow -- see comment about above IB_OPCODE()
macro for more details */
@@ -112,6 +113,7 @@ enum {
IB_OPCODE(RC, FETCH_ADD),
IB_OPCODE(RC, SEND_LAST_WITH_INVALIDATE),
IB_OPCODE(RC, SEND_ONLY_WITH_INVALIDATE),
+ IB_OPCODE(RC, RDMA_FLUSH),
/* UC */
IB_OPCODE(UC, SEND_FIRST),
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index aa174cdcdf5a..16db9eb3467a 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -1314,6 +1314,7 @@ struct ib_qp_attr {
enum ib_wr_opcode {
/* These are shared with userspace */
IB_WR_RDMA_WRITE = IB_UVERBS_WR_RDMA_WRITE,
+ IB_WR_RDMA_FLUSH = IB_UVERBS_WR_RDMA_FLUSH,
IB_WR_RDMA_WRITE_WITH_IMM = IB_UVERBS_WR_RDMA_WRITE_WITH_IMM,
IB_WR_SEND = IB_UVERBS_WR_SEND,
IB_WR_SEND_WITH_IMM = IB_UVERBS_WR_SEND_WITH_IMM,
diff --git a/include/uapi/rdma/ib_user_verbs.h b/include/uapi/rdma/ib_user_verbs.h
index a58df0ebcb79..808cf7a39498 100644
--- a/include/uapi/rdma/ib_user_verbs.h
+++ b/include/uapi/rdma/ib_user_verbs.h
@@ -784,6 +784,7 @@ enum ib_uverbs_wr_opcode {
IB_UVERBS_WR_RDMA_READ_WITH_INV = 11,
IB_UVERBS_WR_MASKED_ATOMIC_CMP_AND_SWP = 12,
IB_UVERBS_WR_MASKED_ATOMIC_FETCH_AND_ADD = 13,
+ IB_UVERBS_WR_RDMA_FLUSH = 14,
/* Review enum ib_wr_opcode before modifying this */
};
diff --git a/include/uapi/rdma/rdma_user_rxe.h b/include/uapi/rdma/rdma_user_rxe.h
index f09c5c9e3dd5..3de56ed5c24f 100644
--- a/include/uapi/rdma/rdma_user_rxe.h
+++ b/include/uapi/rdma/rdma_user_rxe.h
@@ -82,6 +82,13 @@ struct rxe_send_wr {
__u32 invalidate_rkey;
} ex;
union {
+ struct {
+ __aligned_u64 remote_addr;
+ __u32 length;
+ __u32 rkey;
+ __u8 type;
+ __u8 level;
+ } flush;
struct {
__aligned_u64 remote_addr;
__u32 rkey;
--
2.31.1
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