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mlx4_ib.h

/*
 * Copyright (c) 2006, 2007 Cisco Systems.  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 MLX4_IB_H
#define MLX4_IB_H

#include <linux/compiler.h>
#include <linux/list.h>
#include <linux/mutex.h>

#include <rdma/ib_verbs.h>
#include <rdma/ib_umem.h>

#include <linux/mlx4/device.h>
#include <linux/mlx4/doorbell.h>

enum {
      MLX4_IB_DB_PER_PAGE     = PAGE_SIZE / 4
};

struct mlx4_ib_db_pgdir;
struct mlx4_ib_user_db_page;

struct mlx4_ib_db {
      __be32                   *db;
      union {
            struct mlx4_ib_db_pgdir        *pgdir;
            struct mlx4_ib_user_db_page    *user_page;
      }                 u;
      dma_addr_t        dma;
      int               index;
      int               order;
};

struct mlx4_ib_ucontext {
      struct ib_ucontext      ibucontext;
      struct mlx4_uar         uar;
      struct list_head  db_page_list;
      struct mutex            db_page_mutex;
};

struct mlx4_ib_pd {
      struct ib_pd            ibpd;
      u32               pdn;
};

struct mlx4_ib_cq_buf {
      struct mlx4_buf         buf;
      struct mlx4_mtt         mtt;
};

struct mlx4_ib_cq {
      struct ib_cq            ibcq;
      struct mlx4_cq          mcq;
      struct mlx4_ib_cq_buf   buf;
      struct mlx4_ib_db db;
      spinlock_t        lock;
      struct ib_umem           *umem;
};

struct mlx4_ib_mr {
      struct ib_mr            ibmr;
      struct mlx4_mr          mmr;
      struct ib_umem           *umem;
};

struct mlx4_ib_fmr {
      struct ib_fmr           ibfmr;
      struct mlx4_fmr         mfmr;
};

struct mlx4_ib_wq {
      u64                *wrid;
      spinlock_t        lock;
      int               wqe_cnt;
      int               max_post;
      int               max_gs;
      int               offset;
      int               wqe_shift;
      unsigned          head;
      unsigned          tail;
};

struct mlx4_ib_qp {
      struct ib_qp            ibqp;
      struct mlx4_qp          mqp;
      struct mlx4_buf         buf;

      struct mlx4_ib_db db;
      struct mlx4_ib_wq rq;

      u32               doorbell_qpn;
      __be32                  sq_signal_bits;
      int               sq_spare_wqes;
      struct mlx4_ib_wq sq;

      struct ib_umem           *umem;
      struct mlx4_mtt         mtt;
      int               buf_size;
      struct mutex            mutex;
      u8                port;
      u8                alt_port;
      u8                atomic_rd_en;
      u8                resp_depth;
      u8                sq_no_prefetch;
      u8                state;
};

struct mlx4_ib_srq {
      struct ib_srq           ibsrq;
      struct mlx4_srq         msrq;
      struct mlx4_buf         buf;
      struct mlx4_ib_db db;
      u64                *wrid;
      spinlock_t        lock;
      int               head;
      int               tail;
      u16               wqe_ctr;
      struct ib_umem           *umem;
      struct mlx4_mtt         mtt;
      struct mutex            mutex;
};

struct mlx4_ib_ah {
      struct ib_ah            ibah;
      struct mlx4_av          av;
};

struct mlx4_ib_dev {
      struct ib_device  ib_dev;
      struct mlx4_dev          *dev;
      void __iomem             *uar_map;

      struct list_head  pgdir_list;
      struct mutex            pgdir_mutex;

      struct mlx4_uar         priv_uar;
      u32               priv_pdn;
      MLX4_DECLARE_DOORBELL_LOCK(uar_lock);

      struct ib_mad_agent    *send_agent[MLX4_MAX_PORTS][2];
      struct ib_ah             *sm_ah[MLX4_MAX_PORTS];
      spinlock_t        sm_lock;

      struct mutex            cap_mask_mutex;
};

static inline struct mlx4_ib_dev *to_mdev(struct ib_device *ibdev)
{
      return container_of(ibdev, struct mlx4_ib_dev, ib_dev);
}

static inline struct mlx4_ib_ucontext *to_mucontext(struct ib_ucontext *ibucontext)
{
      return container_of(ibucontext, struct mlx4_ib_ucontext, ibucontext);
}

static inline struct mlx4_ib_pd *to_mpd(struct ib_pd *ibpd)
{
      return container_of(ibpd, struct mlx4_ib_pd, ibpd);
}

static inline struct mlx4_ib_cq *to_mcq(struct ib_cq *ibcq)
{
      return container_of(ibcq, struct mlx4_ib_cq, ibcq);
}

static inline struct mlx4_ib_cq *to_mibcq(struct mlx4_cq *mcq)
{
      return container_of(mcq, struct mlx4_ib_cq, mcq);
}

static inline struct mlx4_ib_mr *to_mmr(struct ib_mr *ibmr)
{
      return container_of(ibmr, struct mlx4_ib_mr, ibmr);
}

static inline struct mlx4_ib_fmr *to_mfmr(struct ib_fmr *ibfmr)
{
      return container_of(ibfmr, struct mlx4_ib_fmr, ibfmr);
}
static inline struct mlx4_ib_qp *to_mqp(struct ib_qp *ibqp)
{
      return container_of(ibqp, struct mlx4_ib_qp, ibqp);
}

static inline struct mlx4_ib_qp *to_mibqp(struct mlx4_qp *mqp)
{
      return container_of(mqp, struct mlx4_ib_qp, mqp);
}

static inline struct mlx4_ib_srq *to_msrq(struct ib_srq *ibsrq)
{
      return container_of(ibsrq, struct mlx4_ib_srq, ibsrq);
}

static inline struct mlx4_ib_srq *to_mibsrq(struct mlx4_srq *msrq)
{
      return container_of(msrq, struct mlx4_ib_srq, msrq);
}

static inline struct mlx4_ib_ah *to_mah(struct ib_ah *ibah)
{
      return container_of(ibah, struct mlx4_ib_ah, ibah);
}

int mlx4_ib_db_alloc(struct mlx4_ib_dev *dev, struct mlx4_ib_db *db, int order);
void mlx4_ib_db_free(struct mlx4_ib_dev *dev, struct mlx4_ib_db *db);
int mlx4_ib_db_map_user(struct mlx4_ib_ucontext *context, unsigned long virt,
                  struct mlx4_ib_db *db);
void mlx4_ib_db_unmap_user(struct mlx4_ib_ucontext *context, struct mlx4_ib_db *db);

struct ib_mr *mlx4_ib_get_dma_mr(struct ib_pd *pd, int acc);
int mlx4_ib_umem_write_mtt(struct mlx4_ib_dev *dev, struct mlx4_mtt *mtt,
                     struct ib_umem *umem);
struct ib_mr *mlx4_ib_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
                          u64 virt_addr, int access_flags,
                          struct ib_udata *udata);
int mlx4_ib_dereg_mr(struct ib_mr *mr);

struct ib_cq *mlx4_ib_create_cq(struct ib_device *ibdev, int entries, int vector,
                        struct ib_ucontext *context,
                        struct ib_udata *udata);
int mlx4_ib_destroy_cq(struct ib_cq *cq);
int mlx4_ib_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc);
int mlx4_ib_arm_cq(struct ib_cq *cq, enum ib_cq_notify_flags flags);
void __mlx4_ib_cq_clean(struct mlx4_ib_cq *cq, u32 qpn, struct mlx4_ib_srq *srq);
void mlx4_ib_cq_clean(struct mlx4_ib_cq *cq, u32 qpn, struct mlx4_ib_srq *srq);

struct ib_ah *mlx4_ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr);
int mlx4_ib_query_ah(struct ib_ah *ibah, struct ib_ah_attr *ah_attr);
int mlx4_ib_destroy_ah(struct ib_ah *ah);

struct ib_srq *mlx4_ib_create_srq(struct ib_pd *pd,
                          struct ib_srq_init_attr *init_attr,
                          struct ib_udata *udata);
int mlx4_ib_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr,
                   enum ib_srq_attr_mask attr_mask, struct ib_udata *udata);
int mlx4_ib_query_srq(struct ib_srq *srq, struct ib_srq_attr *srq_attr);
int mlx4_ib_destroy_srq(struct ib_srq *srq);
void mlx4_ib_free_srq_wqe(struct mlx4_ib_srq *srq, int wqe_index);
int mlx4_ib_post_srq_recv(struct ib_srq *ibsrq, struct ib_recv_wr *wr,
                    struct ib_recv_wr **bad_wr);

struct ib_qp *mlx4_ib_create_qp(struct ib_pd *pd,
                        struct ib_qp_init_attr *init_attr,
                        struct ib_udata *udata);
int mlx4_ib_destroy_qp(struct ib_qp *qp);
int mlx4_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
                  int attr_mask, struct ib_udata *udata);
int mlx4_ib_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr, int qp_attr_mask,
                 struct ib_qp_init_attr *qp_init_attr);
int mlx4_ib_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
                  struct ib_send_wr **bad_wr);
int mlx4_ib_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr,
                  struct ib_recv_wr **bad_wr);

int mlx4_MAD_IFC(struct mlx4_ib_dev *dev, int ignore_mkey, int ignore_bkey,
             int port, struct ib_wc *in_wc, struct ib_grh *in_grh,
             void *in_mad, void *response_mad);
int mlx4_ib_process_mad(struct ib_device *ibdev, int mad_flags,   u8 port_num,
                  struct ib_wc *in_wc, struct ib_grh *in_grh,
                  struct ib_mad *in_mad, struct ib_mad *out_mad);
int mlx4_ib_mad_init(struct mlx4_ib_dev *dev);
void mlx4_ib_mad_cleanup(struct mlx4_ib_dev *dev);

struct ib_fmr *mlx4_ib_fmr_alloc(struct ib_pd *pd, int mr_access_flags,
                          struct ib_fmr_attr *fmr_attr);
int mlx4_ib_map_phys_fmr(struct ib_fmr *ibfmr, u64 *page_list, int npages,
                   u64 iova);
int mlx4_ib_unmap_fmr(struct list_head *fmr_list);
int mlx4_ib_fmr_dealloc(struct ib_fmr *fmr);

static inline int mlx4_ib_ah_grh_present(struct mlx4_ib_ah *ah)
{
      return !!(ah->av.g_slid & 0x80);
}

#endif /* MLX4_IB_H */

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