1*38c8a9a5SSteve French /* SPDX-License-Identifier: GPL-2.0-or-later */ 2*38c8a9a5SSteve French /* 3*38c8a9a5SSteve French * Copyright (C) 2017, Microsoft Corporation. 4*38c8a9a5SSteve French * Copyright (C) 2018, LG Electronics. 5*38c8a9a5SSteve French */ 6*38c8a9a5SSteve French 7*38c8a9a5SSteve French #ifndef __KSMBD_TRANSPORT_RDMA_H__ 8*38c8a9a5SSteve French #define __KSMBD_TRANSPORT_RDMA_H__ 9*38c8a9a5SSteve French 10*38c8a9a5SSteve French #define SMBD_DEFAULT_IOSIZE (8 * 1024 * 1024) 11*38c8a9a5SSteve French #define SMBD_MIN_IOSIZE (512 * 1024) 12*38c8a9a5SSteve French #define SMBD_MAX_IOSIZE (16 * 1024 * 1024) 13*38c8a9a5SSteve French 14*38c8a9a5SSteve French /* SMB DIRECT negotiation request packet [MS-SMBD] 2.2.1 */ 15*38c8a9a5SSteve French struct smb_direct_negotiate_req { 16*38c8a9a5SSteve French __le16 min_version; 17*38c8a9a5SSteve French __le16 max_version; 18*38c8a9a5SSteve French __le16 reserved; 19*38c8a9a5SSteve French __le16 credits_requested; 20*38c8a9a5SSteve French __le32 preferred_send_size; 21*38c8a9a5SSteve French __le32 max_receive_size; 22*38c8a9a5SSteve French __le32 max_fragmented_size; 23*38c8a9a5SSteve French } __packed; 24*38c8a9a5SSteve French 25*38c8a9a5SSteve French /* SMB DIRECT negotiation response packet [MS-SMBD] 2.2.2 */ 26*38c8a9a5SSteve French struct smb_direct_negotiate_resp { 27*38c8a9a5SSteve French __le16 min_version; 28*38c8a9a5SSteve French __le16 max_version; 29*38c8a9a5SSteve French __le16 negotiated_version; 30*38c8a9a5SSteve French __le16 reserved; 31*38c8a9a5SSteve French __le16 credits_requested; 32*38c8a9a5SSteve French __le16 credits_granted; 33*38c8a9a5SSteve French __le32 status; 34*38c8a9a5SSteve French __le32 max_readwrite_size; 35*38c8a9a5SSteve French __le32 preferred_send_size; 36*38c8a9a5SSteve French __le32 max_receive_size; 37*38c8a9a5SSteve French __le32 max_fragmented_size; 38*38c8a9a5SSteve French } __packed; 39*38c8a9a5SSteve French 40*38c8a9a5SSteve French #define SMB_DIRECT_RESPONSE_REQUESTED 0x0001 41*38c8a9a5SSteve French 42*38c8a9a5SSteve French /* SMB DIRECT data transfer packet with payload [MS-SMBD] 2.2.3 */ 43*38c8a9a5SSteve French struct smb_direct_data_transfer { 44*38c8a9a5SSteve French __le16 credits_requested; 45*38c8a9a5SSteve French __le16 credits_granted; 46*38c8a9a5SSteve French __le16 flags; 47*38c8a9a5SSteve French __le16 reserved; 48*38c8a9a5SSteve French __le32 remaining_data_length; 49*38c8a9a5SSteve French __le32 data_offset; 50*38c8a9a5SSteve French __le32 data_length; 51*38c8a9a5SSteve French __le32 padding; 52*38c8a9a5SSteve French __u8 buffer[]; 53*38c8a9a5SSteve French } __packed; 54*38c8a9a5SSteve French 55*38c8a9a5SSteve French #ifdef CONFIG_SMB_SERVER_SMBDIRECT 56*38c8a9a5SSteve French int ksmbd_rdma_init(void); 57*38c8a9a5SSteve French void ksmbd_rdma_destroy(void); 58*38c8a9a5SSteve French bool ksmbd_rdma_capable_netdev(struct net_device *netdev); 59*38c8a9a5SSteve French void init_smbd_max_io_size(unsigned int sz); 60*38c8a9a5SSteve French unsigned int get_smbd_max_read_write_size(void); 61*38c8a9a5SSteve French #else ksmbd_rdma_init(void)62*38c8a9a5SSteve Frenchstatic inline int ksmbd_rdma_init(void) { return 0; } ksmbd_rdma_destroy(void)63*38c8a9a5SSteve Frenchstatic inline int ksmbd_rdma_destroy(void) { return 0; } ksmbd_rdma_capable_netdev(struct net_device * netdev)64*38c8a9a5SSteve Frenchstatic inline bool ksmbd_rdma_capable_netdev(struct net_device *netdev) { return false; } init_smbd_max_io_size(unsigned int sz)65*38c8a9a5SSteve Frenchstatic inline void init_smbd_max_io_size(unsigned int sz) { } get_smbd_max_read_write_size(void)66*38c8a9a5SSteve Frenchstatic inline unsigned int get_smbd_max_read_write_size(void) { return 0; } 67*38c8a9a5SSteve French #endif 68*38c8a9a5SSteve French 69*38c8a9a5SSteve French #endif /* __KSMBD_TRANSPORT_RDMA_H__ */ 70