linux/drivers/infiniband/hw/mthca/mthca_srq.c

/*
 * Copyright (c) 2005 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.
 */

#include <linux/slab.h>
#include <linux/string.h>
#include <linux/sched.h>

#include <asm/io.h>

#include <rdma/uverbs_ioctl.h>

#include "mthca_dev.h"
#include "mthca_cmd.h"
#include "mthca_memfree.h"
#include "mthca_wqe.h"

enum { … };

struct mthca_tavor_srq_context { … };

struct mthca_arbel_srq_context { … };

static void *get_wqe(struct mthca_srq *srq, int n)
{ … }

/*
 * Return a pointer to the location within a WQE that we're using as a
 * link when the WQE is in the free list.  We use the imm field
 * because in the Tavor case, posting a WQE may overwrite the next
 * segment of the previous WQE, but a receive WQE will never touch the
 * imm field.  This avoids corrupting our free list if the previous
 * WQE has already completed and been put on the free list when we
 * post the next WQE.
 */
static inline int *wqe_to_link(void *wqe)
{ … }

static void mthca_tavor_init_srq_context(struct mthca_dev *dev,
					 struct mthca_pd *pd,
					 struct mthca_srq *srq,
					 struct mthca_tavor_srq_context *context,
					 struct ib_udata *udata)
{ … }

static void mthca_arbel_init_srq_context(struct mthca_dev *dev,
					 struct mthca_pd *pd,
					 struct mthca_srq *srq,
					 struct mthca_arbel_srq_context *context,
					 struct ib_udata *udata)
{ … }

static void mthca_free_srq_buf(struct mthca_dev *dev, struct mthca_srq *srq)
{ … }

static int mthca_alloc_srq_buf(struct mthca_dev *dev, struct mthca_pd *pd,
			       struct mthca_srq *srq, struct ib_udata *udata)
{ … }

int mthca_alloc_srq(struct mthca_dev *dev, struct mthca_pd *pd,
		    struct ib_srq_attr *attr, struct mthca_srq *srq,
		    struct ib_udata *udata)
{ … }

static inline int get_srq_refcount(struct mthca_dev *dev, struct mthca_srq *srq)
{ … }

void mthca_free_srq(struct mthca_dev *dev, struct mthca_srq *srq)
{ … }

int mthca_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr,
		     enum ib_srq_attr_mask attr_mask, struct ib_udata *udata)
{ … }

int mthca_query_srq(struct ib_srq *ibsrq, struct ib_srq_attr *srq_attr)
{ … }

void mthca_srq_event(struct mthca_dev *dev, u32 srqn,
		     enum ib_event_type event_type)
{ … }

/*
 * This function must be called with IRQs disabled.
 */
void mthca_free_srq_wqe(struct mthca_srq *srq, u32 wqe_addr)
{ … }

int mthca_tavor_post_srq_recv(struct ib_srq *ibsrq, const struct ib_recv_wr *wr,
			      const struct ib_recv_wr **bad_wr)
{ … }

int mthca_arbel_post_srq_recv(struct ib_srq *ibsrq, const struct ib_recv_wr *wr,
			      const struct ib_recv_wr **bad_wr)
{ … }

int mthca_max_srq_sge(struct mthca_dev *dev)
{ … }

int mthca_init_srq_table(struct mthca_dev *dev)
{ … }

void mthca_cleanup_srq_table(struct mthca_dev *dev)
{ … }