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Commit 2a055eb7 authored by Dennis Dalessandro's avatar Dennis Dalessandro Committed by Doug Ledford
Browse files

IB/rdmavt: Add memory region stubs 



Adds the function stubs for allocating, and registering memory regions, as
well as deregistering them.

Reviewed-by: default avatarMike Marciniszyn <mike.marciniszyn@intel.com>
Reviewed-by: default avatarIra Weiny <ira.weiny@intel.com>
Signed-off-by: default avatarDennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
parent 4c1e4972

drivers/infiniband/sw/rdmavt/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -7,4 +7,4 @@ 
#

obj-$(CONFIG_INFINIBAND_RDMAVT) += rdmavt.o



rdmavt-y := vt.o ah.o dma.o pd.o qp.o
 
rdmavt-y := vt.o ah.o dma.o mr.o pd.o qp.o

drivers/infiniband/sw/rdmavt/mr.c

0 → 100644
+165 −0
Original line number Diff line number Diff line 
/*

 * Copyright(c) 2015 Intel Corporation.

 *

 * This file is provided under a dual BSD/GPLv2 license.  When using or

 * redistributing this file, you may do so under either license.

 *

 * GPL LICENSE SUMMARY

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of version 2 of the GNU General Public License as

 * published by the Free Software Foundation.

 *

 * This program is distributed in the hope that it will be useful, but

 * WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * General Public License for more details.

 *

 * BSD LICENSE

 *

 * 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.

 *  - Neither the name of Intel Corporation nor the names of its

 *    contributors may be used to endorse or promote products derived

 *    from this software without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 *

 */



#include <linux/slab.h>

#include "mr.h"



/**

 * rvt_get_dma_mr - get a DMA memory region

 * @pd: protection domain for this memory region

 * @acc: access flags

 *

 * Returns the memory region on success, otherwise returns an errno.

 * Note that all DMA addresses should be created via the

 * struct ib_dma_mapping_ops functions (see dma.c).

 */

struct ib_mr *rvt_get_dma_mr(struct ib_pd *pd, int acc)

{

	/*

	 * Alloc mr and init it.

	 * Alloc lkey.

	 */

	return ERR_PTR(-EOPNOTSUPP);

}



/**

 * rvt_reg_user_mr - register a userspace memory region

 * @pd: protection domain for this memory region

 * @start: starting userspace address

 * @length: length of region to register

 * @mr_access_flags: access flags for this memory region

 * @udata: unused by the driver

 *

 * Returns the memory region on success, otherwise returns an errno.

 */

struct ib_mr *rvt_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,

			      u64 virt_addr, int mr_access_flags,

			      struct ib_udata *udata)

{

	return ERR_PTR(-EOPNOTSUPP);

}



/**

 * rvt_dereg_mr - unregister and free a memory region

 * @ibmr: the memory region to free

 *

 * Returns 0 on success.

 *

 * Note that this is called to free MRs created by rvt_get_dma_mr()

 * or rvt_reg_user_mr().

 */

int rvt_dereg_mr(struct ib_mr *ibmr)

{

	return -EOPNOTSUPP;

}



/**

 * rvt_alloc_mr - Allocate a memory region usable with the

 * @pd: protection domain for this memory region

 * @mr_type: mem region type

 * @max_num_sg: Max number of segments allowed

 *

 * Return the memory region on success, otherwise return an errno.

 */

struct ib_mr *rvt_alloc_mr(struct ib_pd *pd,

			   enum ib_mr_type mr_type,

			   u32 max_num_sg)

{

	return ERR_PTR(-EOPNOTSUPP);

}



/**

 * rvt_alloc_fmr - allocate a fast memory region

 * @pd: the protection domain for this memory region

 * @mr_access_flags: access flags for this memory region

 * @fmr_attr: fast memory region attributes

 *

 * Returns the memory region on success, otherwise returns an errno.

 */

struct ib_fmr *rvt_alloc_fmr(struct ib_pd *pd, int mr_access_flags,

			     struct ib_fmr_attr *fmr_attr)

{

	return ERR_PTR(-EOPNOTSUPP);

}



/**

 * rvt_map_phys_fmr - set up a fast memory region

 * @ibmfr: the fast memory region to set up

 * @page_list: the list of pages to associate with the fast memory region

 * @list_len: the number of pages to associate with the fast memory region

 * @iova: the virtual address of the start of the fast memory region

 *

 * This may be called from interrupt context.

 */



int rvt_map_phys_fmr(struct ib_fmr *ibfmr, u64 *page_list,

		     int list_len, u64 iova)

{

	return -EOPNOTSUPP;

}



/**

 * rvt_unmap_fmr - unmap fast memory regions

 * @fmr_list: the list of fast memory regions to unmap

 *

 * Returns 0 on success.

 */

int rvt_unmap_fmr(struct list_head *fmr_list)

{

	return -EOPNOTSUPP;

}



/**

 * rvt_dealloc_fmr - deallocate a fast memory region

 * @ibfmr: the fast memory region to deallocate

 *

 * Returns 0 on success.

 */

int rvt_dealloc_fmr(struct ib_fmr *ibfmr)

{

	return -EOPNOTSUPP;

}

drivers/infiniband/sw/rdmavt/mr.h

0 → 100644
+69 −0
Original line number Diff line number Diff line 
#ifndef DEF_RVTMR_H

#define DEF_RVTMR_H



/*

 * Copyright(c) 2015 Intel Corporation.

 *

 * This file is provided under a dual BSD/GPLv2 license.  When using or

 * redistributing this file, you may do so under either license.

 *

 * GPL LICENSE SUMMARY

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of version 2 of the GNU General Public License as

 * published by the Free Software Foundation.

 *

 * This program is distributed in the hope that it will be useful, but

 * WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * General Public License for more details.

 *

 * BSD LICENSE

 *

 * 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.

 *  - Neither the name of Intel Corporation nor the names of its

 *    contributors may be used to endorse or promote products derived

 *    from this software without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 *

 */



#include <rdma/rdma_vt.h>



/* Mem Regions */

struct ib_mr *rvt_get_dma_mr(struct ib_pd *pd, int acc);

struct ib_mr *rvt_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,

			      u64 virt_addr, int mr_access_flags,

			      struct ib_udata *udata);

int rvt_dereg_mr(struct ib_mr *ibmr);

struct ib_mr *rvt_alloc_mr(struct ib_pd *pd,

			   enum ib_mr_type mr_type,

			   u32 max_num_sg);

struct ib_fmr *rvt_alloc_fmr(struct ib_pd *pd, int mr_access_flags,

			     struct ib_fmr_attr *fmr_attr);

int rvt_map_phys_fmr(struct ib_fmr *ibfmr, u64 *page_list,

		     int list_len, u64 iova);

int rvt_unmap_fmr(struct list_head *fmr_list);

int rvt_dealloc_fmr(struct ib_fmr *ibfmr);



#endif          /* DEF_RVTMR_H */

drivers/infiniband/sw/rdmavt/vt.c

+10 −0
Original line number Diff line number Diff line
@@ -232,6 +232,16 @@ int rvt_register_device(struct rvt_dev_info *rdi) 
	CHECK_DRIVER_OVERRIDE(rdi, modify_ah);

	CHECK_DRIVER_OVERRIDE(rdi, query_ah);



	/* Mem Region */

	CHECK_DRIVER_OVERRIDE(rdi, get_dma_mr);

	CHECK_DRIVER_OVERRIDE(rdi, reg_user_mr);

	CHECK_DRIVER_OVERRIDE(rdi, dereg_mr);

	CHECK_DRIVER_OVERRIDE(rdi, alloc_mr);

	CHECK_DRIVER_OVERRIDE(rdi, alloc_fmr);

	CHECK_DRIVER_OVERRIDE(rdi, map_phys_fmr);

	CHECK_DRIVER_OVERRIDE(rdi, unmap_fmr);

	CHECK_DRIVER_OVERRIDE(rdi, dealloc_fmr);



	/* DMA Operations */

	rdi->ibdev.dma_ops =

		rdi->ibdev.dma_ops ? : &rvt_default_dma_mapping_ops;

drivers/infiniband/sw/rdmavt/vt.h

+1 −0
Original line number Diff line number Diff line
@@ -53,5 +53,6 @@ 
#include "pd.h"

#include "qp.h"

#include "ah.h"

#include "mr.h"



#endif          /* DEF_RDMAVT_H */