We share some common structures with the user-level driver. This patch adds those structures and shared functions to traverse the QP/CQ rings. Reviewed-by: Yuval Shaia <yuval.shaia@xxxxxxxxxx> Reviewed-by: Jorgen Hansen <jhansen@xxxxxxxxxx> Reviewed-by: George Zhang <georgezhang@xxxxxxxxxx> Reviewed-by: Aditya Sarwade <asarwade@xxxxxxxxxx> Reviewed-by: Bryan Tan <bryantan@xxxxxxxxxx> Signed-off-by: Adit Ranadive <aditr@xxxxxxxxxx> --- Changes v4->v5: - Moved pvrdma_uapi.h and pvrdma_user.h into common UAPI folder. - Renamed to pvrdma-uapi.h and pvrdma-abi.h respectively. - Prefixed unsigned vars with __. Changes v3->v4: - Moved pvrdma_sge into pvrdma_uapi.h --- include/uapi/rdma/Kbuild | 2 + include/uapi/rdma/pvrdma-abi.h | 99 ++++++++++++++++ include/uapi/rdma/pvrdma-uapi.h | 255 ++++++++++++++++++++++++++++++++++++++++ 3 files changed, 356 insertions(+) create mode 100644 include/uapi/rdma/pvrdma-abi.h create mode 100644 include/uapi/rdma/pvrdma-uapi.h diff --git a/include/uapi/rdma/Kbuild b/include/uapi/rdma/Kbuild index 4edb0f2..fc2b285 100644 --- a/include/uapi/rdma/Kbuild +++ b/include/uapi/rdma/Kbuild @@ -7,3 +7,5 @@ header-y += rdma_netlink.h header-y += rdma_user_cm.h header-y += hfi/ header-y += rdma_user_rxe.h +header-y += pvrdma-abi.h +header-y += pvrdma-uapi.h diff --git a/include/uapi/rdma/pvrdma-abi.h b/include/uapi/rdma/pvrdma-abi.h new file mode 100644 index 0000000..6fa0ab6 --- /dev/null +++ b/include/uapi/rdma/pvrdma-abi.h @@ -0,0 +1,99 @@ +/* + * Copyright (c) 2012-2016 VMware, Inc. All rights reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of EITHER the GNU General Public License + * version 2 as published by the Free Software Foundation or the BSD + * 2-Clause License. This program is distributed in the hope that it + * will be useful, but WITHOUT ANY WARRANTY; WITHOUT EVEN THE IMPLIED + * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. + * See the GNU General Public License version 2 for more details at + * http://www.gnu.org/licenses/old-licenses/gpl-2.0.en.html. + * + * You should have received a copy of the GNU General Public License + * along with this program available in the file COPYING in the main + * directory of this source tree. + * + * The BSD 2-Clause License + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef __PVRDMA_USER_H__ +#define __PVRDMA_USER_H__ + +#include <linux/types.h> + +#define PVRDMA_UVERBS_ABI_VERSION 3 +#define PVRDMA_BOARD_ID 1 +#define PVRDMA_REV_ID 1 + +struct pvrdma_alloc_ucontext_resp { + __u32 qp_tab_size; + __u32 reserved; +}; + +struct pvrdma_alloc_pd_resp { + __u32 pdn; + __u32 reserved; +}; + +struct pvrdma_create_cq { + __u64 buf_addr; + __u32 buf_size; + __u32 reserved; +}; + +struct pvrdma_create_cq_resp { + __u32 cqn; + __u32 reserved; +}; + +struct pvrdma_resize_cq { + __u64 buf_addr; + __u32 buf_size; + __u32 reserved; +}; + +struct pvrdma_create_srq { + __u64 buf_addr; +}; + +struct pvrdma_create_srq_resp { + __u32 srqn; + __u32 reserved; +}; + +struct pvrdma_create_qp { + __u64 rbuf_addr; + __u64 sbuf_addr; + __u32 rbuf_size; + __u32 sbuf_size; + __u64 qp_addr; +}; + +#endif /* __PVRDMA_USER_H__ */ diff --git a/include/uapi/rdma/pvrdma-uapi.h b/include/uapi/rdma/pvrdma-uapi.h new file mode 100644 index 0000000..430d8a5 --- /dev/null +++ b/include/uapi/rdma/pvrdma-uapi.h @@ -0,0 +1,255 @@ +/* + * Copyright (c) 2012-2016 VMware, Inc. All rights reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of EITHER the GNU General Public License + * version 2 as published by the Free Software Foundation or the BSD + * 2-Clause License. This program is distributed in the hope that it + * will be useful, but WITHOUT ANY WARRANTY; WITHOUT EVEN THE IMPLIED + * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. + * See the GNU General Public License version 2 for more details at + * http://www.gnu.org/licenses/old-licenses/gpl-2.0.en.html. + * + * You should have received a copy of the GNU General Public License + * along with this program available in the file COPYING in the main + * directory of this source tree. + * + * The BSD 2-Clause License + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef __PVRDMA_UAPI_H__ +#define __PVRDMA_UAPI_H__ + +#include <linux/types.h> + +#define PVRDMA_VERSION 17 + +#define PVRDMA_UAR_HANDLE_MASK 0x00FFFFFF /* Bottom 24 bits. */ +#define PVRDMA_UAR_QP_OFFSET 0 /* Offset of QP doorbell. */ +#define PVRDMA_UAR_QP_SEND BIT(30) /* Send bit. */ +#define PVRDMA_UAR_QP_RECV BIT(31) /* Recv bit. */ +#define PVRDMA_UAR_CQ_OFFSET 4 /* Offset of CQ doorbell. */ +#define PVRDMA_UAR_CQ_ARM_SOL BIT(29) /* Arm solicited bit. */ +#define PVRDMA_UAR_CQ_ARM BIT(30) /* Arm bit. */ +#define PVRDMA_UAR_CQ_POLL BIT(31) /* Poll bit. */ +#define PVRDMA_INVALID_IDX -1 /* Invalid index. */ + +/* PVRDMA atomic compare and swap */ +struct pvrdma_exp_cmp_swap { + __u64 swap_val; + __u64 compare_val; + __u64 swap_mask; + __u64 compare_mask; +}; + +/* PVRDMA atomic fetch and add */ +struct pvrdma_exp_fetch_add { + __u64 add_val; + __u64 field_boundary; +}; + +/* PVRDMA address vector. */ +struct pvrdma_av { + __u32 port_pd; + __u32 sl_tclass_flowlabel; + __u8 dgid[16]; + __u8 src_path_bits; + __u8 gid_index; + __u8 stat_rate; + __u8 hop_limit; + __u8 dmac[6]; + __u8 reserved[6]; +}; + +/* PVRDMA scatter/gather entry */ +struct pvrdma_sge { + __u64 addr; + __u32 length; + __u32 lkey; +}; + +/* PVRDMA receive queue work request */ +struct pvrdma_rq_wqe_hdr { + __u64 wr_id; /* wr id */ + __u32 num_sge; /* size of s/g array */ + __u32 total_len; /* reserved */ +}; +/* Use pvrdma_sge (ib_sge) for receive queue s/g array elements. */ + +/* PVRDMA send queue work request */ +struct pvrdma_sq_wqe_hdr { + __u64 wr_id; /* wr id */ + __u32 num_sge; /* size of s/g array */ + __u32 total_len; /* reserved */ + __u32 opcode; /* operation type */ + __u32 send_flags; /* wr flags */ + union { + __u32 imm_data; + __u32 invalidate_rkey; + } ex; + __u32 reserved; + union { + struct { + __u64 remote_addr; + __u32 rkey; + __u8 reserved[4]; + } rdma; + struct { + __u64 remote_addr; + __u64 compare_add; + __u64 swap; + __u32 rkey; + __u32 reserved; + } atomic; + struct { + __u64 remote_addr; + __u32 log_arg_sz; + __u32 rkey; + union { + struct pvrdma_exp_cmp_swap cmp_swap; + struct pvrdma_exp_fetch_add fetch_add; + } wr_data; + } masked_atomics; + struct { + __u64 iova_start; + __u64 pl_pdir_dma; + __u32 page_shift; + __u32 page_list_len; + __u32 length; + __u32 access_flags; + __u32 rkey; + } fast_reg; + struct { + __u32 remote_qpn; + __u32 remote_qkey; + struct pvrdma_av av; + } ud; + } wr; +}; +/* Use pvrdma_sge (ib_sge) for send queue s/g array elements. */ + +/* Completion queue element. */ +struct pvrdma_cqe { + __u64 wr_id; + __u64 qp; + __u32 opcode; + __u32 status; + __u32 byte_len; + __u32 imm_data; + __u32 src_qp; + __u32 wc_flags; + __u32 vendor_err; + __u16 pkey_index; + __u16 slid; + __u8 sl; + __u8 dlid_path_bits; + __u8 port_num; + __u8 smac[6]; + __u8 reserved2[7]; /* Pad to next power of 2 (64). */ +}; + +struct pvrdma_ring { + atomic_t prod_tail; /* Producer tail. */ + atomic_t cons_head; /* Consumer head. */ +}; + +struct pvrdma_ring_state { + struct pvrdma_ring tx; /* Tx ring. */ + struct pvrdma_ring rx; /* Rx ring. */ +}; + +static inline int pvrdma_idx_valid(__u32 idx, __u32 max_elems) +{ + /* Generates fewer instructions than a less-than. */ + return (idx & ~((max_elems << 1) - 1)) == 0; +} + +static inline __s32 pvrdma_idx(atomic_t *var, __u32 max_elems) +{ + const unsigned int idx = atomic_read(var); + + if (pvrdma_idx_valid(idx, max_elems)) + return idx & (max_elems - 1); + return PVRDMA_INVALID_IDX; +} + +static inline void pvrdma_idx_ring_inc(atomic_t *var, __u32 max_elems) +{ + __u32 idx = atomic_read(var) + 1; /* Increment. */ + + idx &= (max_elems << 1) - 1; /* Modulo size, flip gen. */ + atomic_set(var, idx); +} + +static inline __s32 pvrdma_idx_ring_has_space(const struct pvrdma_ring *r, + __u32 max_elems, __u32 *out_tail) +{ + const __u32 tail = atomic_read(&r->prod_tail); + const __u32 head = atomic_read(&r->cons_head); + + if (pvrdma_idx_valid(tail, max_elems) && + pvrdma_idx_valid(head, max_elems)) { + *out_tail = tail & (max_elems - 1); + return tail != (head ^ max_elems); + } + return PVRDMA_INVALID_IDX; +} + +static inline __s32 pvrdma_idx_ring_has_data(const struct pvrdma_ring *r, + __u32 max_elems, __u32 *out_head) +{ + const __u32 tail = atomic_read(&r->prod_tail); + const __u32 head = atomic_read(&r->cons_head); + + if (pvrdma_idx_valid(tail, max_elems) && + pvrdma_idx_valid(head, max_elems)) { + *out_head = head & (max_elems - 1); + return tail != head; + } + return PVRDMA_INVALID_IDX; +} + +static inline bool pvrdma_idx_ring_is_valid_idx(const struct pvrdma_ring *r, + __u32 max_elems, __u32 *idx) +{ + const __u32 tail = atomic_read(&r->prod_tail); + const __u32 head = atomic_read(&r->cons_head); + + if (pvrdma_idx_valid(tail, max_elems) && + pvrdma_idx_valid(head, max_elems) && + pvrdma_idx_valid(*idx, max_elems)) { + if (tail > head && (*idx < tail && *idx >= head)) + return true; + else if (head > tail && (*idx >= head || *idx < tail)) + return true; + } + return false; +} + +#endif /* __PVRDMA_UAPI_H__ */ -- 2.7.4 -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
