/*
* Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
* Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* 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.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef RXE_VERBS_H
#define RXE_VERBS_H
#include <linux/interrupt.h>
#include <rdma/rdma_user_rxe.h>
#include "rxe_pool.h"
#include "rxe_task.h"
static inline int pkey_match(u16 key1, u16 key2)
{
return (((key1 & 0x7fff) != 0) &&
((key1 & 0x7fff) == (key2 & 0x7fff)) &&
((key1 & 0x8000) || (key2 & 0x8000))) ? 1 : 0;
}
/* Return >0 if psn_a > psn_b
* 0 if psn_a == psn_b
* <0 if psn_a < psn_b
*/
static inline int psn_compare(u32 psn_a, u32 psn_b)
{
s32 diff;
diff = (psn_a - psn_b) << 8;
return diff;
}
struct rxe_ucontext {
struct rxe_pool_entry pelem;
struct ib_ucontext ibuc;
};
struct rxe_pd {
struct rxe_pool_entry pelem;
struct ib_pd ibpd;
};
struct rxe_ah {
struct rxe_pool_entry pelem;
struct ib_ah ibah;
struct rxe_pd *pd;
struct rxe_av av;
};
struct rxe_cqe {
union {
struct ib_wc ibwc;
struct ib_uverbs_wc uibwc;
};
};
struct rxe_cq {
struct rxe_pool_entry pelem;
struct ib_cq ibcq;
struct rxe_queue *queue;
spinlock_t cq_lock;
u8 notify;
int is_user;
struct tasklet_struct comp_task;
};
enum wqe_state {
wqe_state_posted,
wqe_state_processing,
wqe_state_pending,
wqe_state_done,
wqe_state_error,
};
struct rxe_sq {
int max_wr;
int max_sge;
int max_inline;
spinlock_t sq_lock; /* guard queue */
struct rxe_queue *queue;
};
struct rxe_rq {
int max_wr;
int max_sge;
spinlock_t producer_lock; /* guard queue producer */
spinlock_t consumer_lock; /* guard queue consumer */
struct rxe_queue *queue;
};
struct rxe_srq {
struct rxe_pool_entry pelem;
struct ib_srq ibsrq;
struct rxe_pd *pd;
struct rxe_rq rq;
u32 srq_num;
int limit;
int error;
};
enum rxe_qp_state {
QP_STATE_RESET,
QP_STATE_INIT,
QP_STATE_READY,
QP_STATE_DRAIN, /* req only */
QP_STATE_DRAINED, /* req only */
QP_STATE_ERROR
};
extern char *rxe_qp_state_name[];
struct rxe_req_info {
enum rxe_qp_state state;
int wqe_index;
u32 psn;
int opcode;
atomic_t rd_atomic;
int wait_fence;
int need_rd_atomic;
int wait_psn;
int need_retry;
int noack_pkts;
struct rxe_task task;
};
struct rxe_comp_info {
u32 psn;
int opcode;
int timeout;
int timeout_retry;
u32 retry_cnt;
u32 rnr_retry;
struct rxe_task task;
};
enum rdatm_res_state {
rdatm_res_state_next,
rdatm_res_state_new,
rdatm_res_state_replay,
};
struct resp_res {
int type;
u32 first_psn;
u32 last_psn;
u32 cur_psn;
enum rdatm_res_state state;
union {
struct {
struct sk_buff *skb;
} atomic;
struct {
struct rxe_mem *mr;
u64 va_org;
u32 rkey;
u32 length;
u64 va;
u32 resid;
} read;
};
};
struct rxe_resp_info {
enum rxe_qp_state state;
u32 msn;
u32 psn;
int opcode;
int drop_msg;
int goto_error;
int sent_psn_nak;
enum ib_wc_status status;
u8 aeth_syndrome;
/* Receive only */
struct rxe_recv_wqe *wqe;
/* RDMA read / atomic only */
u64 va;
struct rxe_mem *mr;
u32 resid;
u32 rkey;
u64 atomic_orig;
/* SRQ only */
struct {
struct rxe_recv_wqe wqe;
struct ib_sge sge[RXE_MAX_SGE];
} srq_wqe;
/* Responder resources. It's a circular list where the oldest
* resource is dropped first.
*/
struct resp_res *resources;
unsigned int res_head;
unsigned int res_tail;
struct resp_res *res;
struct rxe_task task;
};
struct rxe_qp {
struct rxe_pool_entry pelem;
struct ib_qp ibqp;
struct ib_qp_attr attr;
unsigned int valid;
unsigned int mtu;
int is_user;
struct rxe_pd *pd;
struct rxe_srq *srq;
struct rxe_cq *scq;
struct rxe_cq *rcq;
enum ib_sig_type sq_sig_type;
struct rxe_sq sq;
struct rxe_rq rq;
struct socket *sk;
struct rxe_av pri_av;
struct rxe_av alt_av;
/* list of mcast groups qp has joined (for cleanup) */
struct list_head grp_list;
spinlock_t grp_lock; /* guard grp_list */
struct sk_buff_head req_pkts;
struct sk_buff_head resp_pkts;
struct sk_buff_head send_pkts;
struct rxe_req_info req;
struct rxe_comp_info comp;
struct rxe_resp_info resp;
atomic_t ssn;
atomic_t skb_out;
int need_req_skb;
/* Timer for retranmitting packet when ACKs have been lost. RC
* only. The requester sets it when it is not already
* started. The responder resets it whenever an ack is
* received.
*/
struct timer_list retrans_timer;
u64 qp_timeout_jiffies;
/* Timer for handling RNR NAKS. */
struct timer_list rnr_nak_timer;
spinlock_t state_lock; /* guard requester and completer */
};
enum rxe_mem_state {
RXE_MEM_STATE_ZOMBIE,
RXE_MEM_STATE_INVALID,
RXE_MEM_STATE_FREE,
RXE_MEM_STATE_VALID,
};
enum rxe_mem_type {
RXE_MEM_TYPE_NONE,
RXE_MEM_TYPE_DMA,
RXE_MEM_TYPE_MR,
RXE_MEM_TYPE_FMR,
RXE_MEM_TYPE_MW,
};
#define RXE_BUF_PER_MAP (PAGE_SIZE / sizeof(struct rxe_phys_buf))
struct rxe_phys_buf {
u64 addr;
u64 size;
};
struct rxe_map {
struct rxe_phys_buf buf[RXE_BUF_PER_MAP];
};
struct rxe_mem {
struct rxe_pool_entry pelem;
union {
struct ib_mr ibmr;
struct ib_mw ibmw;
};
struct rxe_pd *pd;
struct ib_umem *umem;
u32 lkey;
u32 rkey;
enum rxe_mem_state state;
enum rxe_mem_type type;
u64 va;
u64 iova;
size_t length;
u32 offset;
int access;
int page_shift;
int page_mask;
int map_shift;
int map_mask;
u32 num_buf;
u32 nbuf;
u32 max_buf;
u32 num_map;
struct rxe_map **map;
};
struct rxe_mc_grp {
struct rxe_pool_entry pelem;
spinlock_t mcg_lock; /* guard group */
struct rxe_dev *rxe;
struct list_head qp_list;
union ib_gid mgid;
int num_qp;
u32 qkey;
u16 pkey;
};
struct rxe_mc_elem {
struct rxe_pool_entry pelem;
struct list_head qp_list;
struct list_head grp_list;
struct rxe_qp *qp;
struct rxe_mc_grp *grp;
};
struct rxe_port {
struct ib_port_attr attr;
u16 *pkey_tbl;
__be64 port_guid;
__be64 subnet_prefix;
spinlock_t port_lock; /* guard port */
unsigned int mtu_cap;
/* special QPs */
u32 qp_smi_index;
u32 qp_gsi_index;
};
struct rxe_dev {
struct ib_device ib_dev;
struct ib_device_attr attr;
int max_ucontext;
int max_inline_data;
struct kref ref_cnt;
struct mutex usdev_lock;
struct net_device *ndev;
int xmit_errors;
struct rxe_pool uc_pool;
struct rxe_pool pd_pool;
struct rxe_pool ah_pool;
struct rxe_pool srq_pool;
struct rxe_pool qp_pool;
struct rxe_pool cq_pool;
struct rxe_pool mr_pool;
struct rxe_pool mw_pool;
struct rxe_pool mc_grp_pool;
struct rxe_pool mc_elem_pool;
spinlock_t pending_lock; /* guard pending_mmaps */
struct list_head pending_mmaps;
spinlock_t mmap_offset_lock; /* guard mmap_offset */
int mmap_offset;
struct rxe_port port;
struct list_head list;
};
static inline struct rxe_dev *to_rdev(struct ib_device *dev)
{
return dev ? container_of(dev, struct rxe_dev, ib_dev) : NULL;
}
static inline struct rxe_ucontext *to_ruc(struct ib_ucontext *uc)
{
return uc ? container_of(uc, struct rxe_ucontext, ibuc) : NULL;
}
static inline struct rxe_pd *to_rpd(struct ib_pd *pd)
{
return pd ? container_of(pd, struct rxe_pd, ibpd) : NULL;
}
static inline struct rxe_ah *to_rah(struct ib_ah *ah)
{
return ah ? container_of(ah, struct rxe_ah, ibah) : NULL;
}
static inline struct rxe_srq *to_rsrq(struct ib_srq *srq)
{
return srq ? container_of(srq, struct rxe_srq, ibsrq) : NULL;
}
static inline struct rxe_qp *to_rqp(struct ib_qp *qp)
{
return qp ? container_of(qp, struct rxe_qp, ibqp) : NULL;
}
static inline struct rxe_cq *to_rcq(struct ib_cq *cq)
{
return cq ? container_of(cq, struct rxe_cq, ibcq) : NULL;
}
static inline struct rxe_mem *to_rmr(struct ib_mr *mr)
{
return mr ? container_of(mr, struct rxe_mem, ibmr) : NULL;
}
static inline struct rxe_mem *to_rmw(struct ib_mw *mw)
{
return mw ? container_of(mw, struct rxe_mem, ibmw) : NULL;
}
int rxe_register_device(struct rxe_dev *rxe);
int rxe_unregister_device(struct rxe_dev *rxe);
void rxe_mc_cleanup(struct rxe_pool_entry *arg);
#endif /* RXE_VERBS_H */
