From 0722f1f7bf85c83a8ed62c626e49f97d6ebd09c3 Mon Sep 17 00:00:00 2001 From: Selvin Xavier Date: Thu, 30 Mar 2023 02:45:38 -0700 Subject: RDMA/bnxt_re: RoCE slow path TLV support Header file to support TLV encapsulated commands. These functions will be used by the driver in the follow up patches. Signed-off-by: Selvin Xavier Link: https://lore.kernel.org/r/1680169540-10029-6-git-send-email-selvin.xavier@broadcom.com Signed-off-by: Leon Romanovsky --- drivers/infiniband/hw/bnxt_re/qplib_tlv.h | 162 ++++++++++++++++++++++++++++++ 1 file changed, 162 insertions(+) create mode 100644 drivers/infiniband/hw/bnxt_re/qplib_tlv.h (limited to 'drivers/infiniband') diff --git a/drivers/infiniband/hw/bnxt_re/qplib_tlv.h b/drivers/infiniband/hw/bnxt_re/qplib_tlv.h new file mode 100644 index 000000000000..402c220734f6 --- /dev/null +++ b/drivers/infiniband/hw/bnxt_re/qplib_tlv.h @@ -0,0 +1,162 @@ +/* SPDX-License-Identifier: GPL-2.0 or BSD-3-Clause */ + +#ifndef __QPLIB_TLV_H__ +#define __QPLIB_TLV_H__ + +struct roce_tlv { + struct tlv tlv; + u8 total_size; // in units of 16 byte chunks + u8 unused[7]; // for 16 byte alignment +}; + +#define CHUNK_SIZE 16 +#define CHUNKS(x) (((x) + CHUNK_SIZE - 1) / CHUNK_SIZE) + +static inline void __roce_1st_tlv_prep(struct roce_tlv *rtlv, u8 tot_chunks, + u16 content_bytes, u8 flags) +{ + rtlv->tlv.cmd_discr = cpu_to_le16(CMD_DISCR_TLV_ENCAP); + rtlv->tlv.tlv_type = cpu_to_le16(TLV_TYPE_ROCE_SP_COMMAND); + rtlv->tlv.length = cpu_to_le16(content_bytes); + rtlv->tlv.flags = TLV_FLAGS_REQUIRED; + rtlv->tlv.flags |= flags ? TLV_FLAGS_MORE : 0; + rtlv->total_size = (tot_chunks); +} + +static inline void __roce_ext_tlv_prep(struct roce_tlv *rtlv, u16 tlv_type, + u16 content_bytes, u8 more, u8 flags) +{ + rtlv->tlv.cmd_discr = cpu_to_le16(CMD_DISCR_TLV_ENCAP); + rtlv->tlv.tlv_type = cpu_to_le16(tlv_type); + rtlv->tlv.length = cpu_to_le16(content_bytes); + rtlv->tlv.flags |= more ? TLV_FLAGS_MORE : 0; + rtlv->tlv.flags |= flags ? TLV_FLAGS_REQUIRED : 0; +} + +/* + * TLV size in units of 16 byte chunks + */ +#define TLV_SIZE ((sizeof(struct roce_tlv) + 15) / 16) +/* + * TLV length in bytes + */ +#define TLV_BYTES (TLV_SIZE * 16) + +#define HAS_TLV_HEADER(msg) (le16_to_cpu(((struct tlv *)(msg))->cmd_discr) == CMD_DISCR_TLV_ENCAP) +#define GET_TLV_DATA(tlv) ((void *)&((uint8_t *)(tlv))[TLV_BYTES]) + +static inline u8 __get_cmdq_base_opcode(struct cmdq_base *req, u32 size) +{ + if (HAS_TLV_HEADER(req) && size > TLV_BYTES) + return ((struct cmdq_base *)GET_TLV_DATA(req))->opcode; + else + return req->opcode; +} + +static inline void __set_cmdq_base_opcode(struct cmdq_base *req, + u32 size, u8 val) +{ + if (HAS_TLV_HEADER(req) && size > TLV_BYTES) + ((struct cmdq_base *)GET_TLV_DATA(req))->opcode = val; + else + req->opcode = val; +} + +static inline __le16 __get_cmdq_base_cookie(struct cmdq_base *req, u32 size) +{ + if (HAS_TLV_HEADER(req) && size > TLV_BYTES) + return ((struct cmdq_base *)GET_TLV_DATA(req))->cookie; + else + return req->cookie; +} + +static inline void __set_cmdq_base_cookie(struct cmdq_base *req, + u32 size, __le16 val) +{ + if (HAS_TLV_HEADER(req) && size > TLV_BYTES) + ((struct cmdq_base *)GET_TLV_DATA(req))->cookie = val; + else + req->cookie = val; +} + +static inline __le64 __get_cmdq_base_resp_addr(struct cmdq_base *req, u32 size) +{ + if (HAS_TLV_HEADER(req) && size > TLV_BYTES) + return ((struct cmdq_base *)GET_TLV_DATA(req))->resp_addr; + else + return req->resp_addr; +} + +static inline void __set_cmdq_base_resp_addr(struct cmdq_base *req, + u32 size, __le64 val) +{ + if (HAS_TLV_HEADER(req) && size > TLV_BYTES) + ((struct cmdq_base *)GET_TLV_DATA(req))->resp_addr = val; + else + req->resp_addr = val; +} + +static inline u8 __get_cmdq_base_resp_size(struct cmdq_base *req, u32 size) +{ + if (HAS_TLV_HEADER(req) && size > TLV_BYTES) + return ((struct cmdq_base *)GET_TLV_DATA(req))->resp_size; + else + return req->resp_size; +} + +static inline void __set_cmdq_base_resp_size(struct cmdq_base *req, + u32 size, u8 val) +{ + if (HAS_TLV_HEADER(req) && size > TLV_BYTES) + ((struct cmdq_base *)GET_TLV_DATA(req))->resp_size = val; + else + req->resp_size = val; +} + +static inline u8 __get_cmdq_base_cmd_size(struct cmdq_base *req, u32 size) +{ + if (HAS_TLV_HEADER(req) && size > TLV_BYTES) + return ((struct roce_tlv *)(req))->total_size; + else + return req->cmd_size; +} + +static inline void __set_cmdq_base_cmd_size(struct cmdq_base *req, + u32 size, u8 val) +{ + if (HAS_TLV_HEADER(req) && size > TLV_BYTES) + ((struct cmdq_base *)GET_TLV_DATA(req))->cmd_size = val; + else + req->cmd_size = val; +} + +static inline __le16 __get_cmdq_base_flags(struct cmdq_base *req, u32 size) +{ + if (HAS_TLV_HEADER(req) && size > TLV_BYTES) + return ((struct cmdq_base *)GET_TLV_DATA(req))->flags; + else + return req->flags; +} + +static inline void __set_cmdq_base_flags(struct cmdq_base *req, + u32 size, __le16 val) +{ + if (HAS_TLV_HEADER(req) && size > TLV_BYTES) + ((struct cmdq_base *)GET_TLV_DATA(req))->flags = val; + else + req->flags = val; +} + +struct bnxt_qplib_tlv_modify_cc_req { + struct roce_tlv tlv_hdr; + struct cmdq_modify_roce_cc base_req; + __le64 tlvpad; + struct cmdq_modify_roce_cc_gen1_tlv ext_req; +}; + +struct bnxt_qplib_tlv_query_rcc_sb { + struct roce_tlv tlv_hdr; + struct creq_query_roce_cc_resp_sb base_sb; + struct creq_query_roce_cc_gen1_resp_sb_tlv gen1_sb; +}; +#endif /* __QPLIB_TLV_H__ */ -- cgit v1.2.3