/*
* Copyright (c) 2004 Topspin Communications. All rights reserved.
* Copyright (c) 2005, 2006 Cisco Systems. All rights reserved.
* Copyright (c) 2005 Mellanox Technologies. 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 MTHCA_PROVIDER_H
#define MTHCA_PROVIDER_H
#include <rdma/ib_verbs.h>
#include <rdma/ib_pack.h>
#define MTHCA_MPT_FLAG_ATOMIC (1 << 14)
#define MTHCA_MPT_FLAG_REMOTE_WRITE (1 << 13)
#define MTHCA_MPT_FLAG_REMOTE_READ (1 << 12)
#define MTHCA_MPT_FLAG_LOCAL_WRITE (1 << 11)
#define MTHCA_MPT_FLAG_LOCAL_READ (1 << 10)
struct mthca_buf_list {
void *buf;
DEFINE_DMA_UNMAP_ADDR(mapping);
};
union mthca_buf {
struct mthca_buf_list direct;
struct mthca_buf_list *page_list;
};
struct mthca_uar {
unsigned long pfn;
int index;
};
struct mthca_user_db_table;
struct mthca_ucontext {
struct ib_ucontext ibucontext;
struct mthca_uar uar;
struct mthca_user_db_table *db_tab;
int reg_mr_warned;
};
struct mthca_mtt;
struct mthca_mr {
struct ib_mr ibmr;
struct ib_umem *umem;
struct mthca_mtt *mtt;
};
struct mthca_pd {
struct ib_pd ibpd;
u32 pd_num;
atomic_t sqp_count;
struct mthca_mr ntmr;
int privileged;
};
struct mthca_eq {
struct mthca_dev *dev;
int eqn;
u32 eqn_mask;
u32 cons_index;
u16 msi_x_vector;
u16 msi_x_entry;
int have_irq;
int nent;
struct mthca_buf_list *page_list;
struct mthca_mr mr;
char irq_name[IB_DEVICE_NAME_MAX];
};
struct mthca_av;
enum mthca_ah_type {
MTHCA_AH_ON_HCA,
MTHCA_AH_PCI_POOL,
MTHCA_AH_KMALLOC
};
struct mthca_ah {
struct ib_ah ibah;
enum mthca_ah_type type;
u32 key;
struct mthca_av *av;
dma_addr_t avdma;
};
/*
* Quick description of our CQ/QP locking scheme:
*
* We have one global lock that protects dev->cq/qp_table. Each
* struct mthca_cq/qp also has its own lock. An individual qp lock
* may be taken inside of an individual cq lock. Both cqs attached to
* a qp may be locked, with the cq with the lower cqn locked first.
* No other nesting should be done.
*
* Each struct mthca_cq/qp also has an ref count, protected by the
* corresponding table lock. The pointer from the cq/qp_table to the
* struct counts as one reference. This reference also is good for
* access through the consumer API, so modifying the CQ/QP etc doesn't
* need to take another reference. Access to a QP because of a
* completion being polled does not need a reference either.
*
* Finally, each struct mthca_cq/qp has a wait_queue_head_t for the
* destroy function to sleep on.
*
* This means that access from the consumer API requires nothing but
* taking the struct's lock.
*
* Access because of a completion event should go as follows:
* - lock cq/qp_table and look up struct
* - increment ref count in struct
* - drop cq/qp_table lock
* - lock struct, do your thing, and unlock struct
* - decrement ref count; if zero, wake up waiters
*
* To destroy a CQ/QP, we can do the following:
* - lock cq/qp_table
* - remove pointer and decrement ref count
* - unlock cq/qp_table lock
* - wait_event until ref count is zero
*
* It is the consumer's responsibilty to make sure that no QP
* operations (WQE posting or state modification) are pending when a
* QP is destroyed. Also, the consumer must make sure that calls to
* qp_modify are serialized. Similarly, the consumer is responsible
* for ensuring that no CQ resize operations are pending when a CQ
* is destroyed.
*
* Possible optimizations (wait for profile data to see if/where we
* have locks bouncing between CPUs):
* - split cq/qp table lock into n separate (cache-aligned) locks,
* indexed (say) by the page in the table
* - split QP struct lock into three (one for common info, one for the
* send queue and one for the receive queue)
*/
struct mthca_cq_buf {
union mthca_buf queue;
struct mthca_mr mr;
int is_direct;
};
struct mthca_cq_resize {
struct mthca_cq_buf buf;
int cqe;
enum {
CQ_RESIZE_ALLOC,
CQ_RESIZE_READY,
CQ_RESIZE_SWAPPED
} state;
};
struct mthca_cq {
struct ib_cq ibcq;
spinlock_t lock;
int refcount;
int cqn;
u32 cons_index;
struct mthca_cq_buf buf;
struct mthca_cq_resize *resize_buf;
int is_kernel;
/* Next fields are Arbel only */
int set_ci_db_index;
__be32 *set_ci_db;
int arm_db_index;
__be32 *arm_db;
int arm_sn;
wait_queue_head_t wait;
struct mutex mutex;
};
struct mthca_srq {
struct ib_srq ibsrq;
spinlock_t lock;
int refcount;
int srqn;
int max;
int max_gs;
int wqe_shift;
int first_free;
int last_free;
u16 counter; /* Arbel only */
int db_index; /* Arbel only */
__be32 *db; /* Arbel only */
void *last;
int is_direct;
u64 *wrid;
union mthca_buf queue;
struct mthca_mr mr;
wait_queue_head_t wait;
struct mutex mutex;
};
struct mthca_wq {
spinlock_t lock;
int max;
unsigned next_ind;
unsigned last_comp;
unsigned head;
unsigned tail;
void *last;
int max_gs;
int wqe_shift;
int db_index; /* Arbel only */
__be32 *db;
};
struct mthca_sqp {
int pkey_index;
u32 qkey;
u32 send_psn;
struct ib_ud_header ud_header;
int header_buf_size;
void *header_buf;
dma_addr_t header_dma;
};
struct mthca_qp {
struct ib_qp ibqp;
int refcount;
u32 qpn;
int is_direct;
u8 port; /* for SQP and memfree use only */
u8 alt_port; /* for memfree use only */
u8 transport;
u8 state;
u8 atomic_rd_en;
u8 resp_depth;
struct mthca_mr mr;
struct mthca_wq rq;
struct mthca_wq sq;
enum ib_sig_type sq_policy;
int send_wqe_offset;
int max_inline_data;
u64 *wrid;
union mthca_buf queue;
wait_queue_head_t wait;
struct mutex mutex;
struct mthca_sqp *sqp;
};
static inline struct mthca_ucontext *to_mucontext(struct ib_ucontext *ibucontext)
{
return container_of(ibucontext, struct mthca_ucontext, ibucontext);
}
static inline struct mthca_mr *to_mmr(struct ib_mr *ibmr)
{
return container_of(ibmr, struct mthca_mr, ibmr);
}
static inline struct mthca_pd *to_mpd(struct ib_pd *ibpd)
{
return container_of(ibpd, struct mthca_pd, ibpd);
}
static inline struct mthca_ah *to_mah(struct ib_ah *ibah)
{
return container_of(ibah, struct mthca_ah, ibah);
}
static inline struct mthca_cq *to_mcq(struct ib_cq *ibcq)
{
return container_of(ibcq, struct mthca_cq, ibcq);
}
static inline struct mthca_srq *to_msrq(struct ib_srq *ibsrq)
{
return container_of(ibsrq, struct mthca_srq, ibsrq);
}
static inline struct mthca_qp *to_mqp(struct ib_qp *ibqp)
{
return container_of(ibqp, struct mthca_qp, ibqp);
}
#endif /* MTHCA_PROVIDER_H */
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