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RDMA/bnxt_re: RoCE slow path TLV support

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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 <selvin.xavier@broadcom.com>
Link: https://lore.kernel.org/r/1680169540-10029-6-git-send-email-selvin.xavier@broadcom.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
This commit is contained in:
Selvin Xavier 2023-03-30 02:45:38 -07:00 committed by Leon Romanovsky
parent ff015bcd21
commit 0722f1f7bf
1 changed files with 162 additions and 0 deletions
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162
drivers/infiniband/hw/bnxt_re/qplib_tlv.h Normal file
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/* 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__ */