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Commit 5e0b537c authored by Roland Dreier's avatar Roland Dreier Committed by Linus Torvalds
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[PATCH] IB uverbs: add mthca user context support 



Add support for managing userspace contexts to mthca.

Signed-off-by: default avatarRoland Dreier <rolandd@cisco.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 56483ec1

drivers/infiniband/hw/mthca/mthca_provider.c

+58 −0
Original line number Diff line number Diff line 
/*

 * Copyright (c) 2004, 2005 Topspin Communications.  All rights reserved.

 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.

 * 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
@@ -37,6 +38,8 @@ 


#include "mthca_dev.h"

#include "mthca_cmd.h"

#include "mthca_user.h"

#include "mthca_memfree.h"



static int mthca_query_device(struct ib_device *ibdev,

			      struct ib_device_attr *props)
@@ -284,6 +287,59 @@ static int mthca_query_gid(struct ib_device *ibdev, u8 port, 
	return err;

}



static struct ib_ucontext *mthca_alloc_ucontext(struct ib_device *ibdev,

						struct ib_udata *udata)

{

	struct mthca_alloc_ucontext_resp uresp;

	struct mthca_ucontext           *context;

	int                              err;



	memset(&uresp, 0, sizeof uresp);



	uresp.qp_tab_size = to_mdev(ibdev)->limits.num_qps;

	if (mthca_is_memfree(to_mdev(ibdev)))

		uresp.uarc_size = to_mdev(ibdev)->uar_table.uarc_size;

	else

		uresp.uarc_size = 0;



	context = kmalloc(sizeof *context, GFP_KERNEL);

	if (!context)

		return ERR_PTR(-ENOMEM);



	err = mthca_uar_alloc(to_mdev(ibdev), &context->uar);

	if (err) {

		kfree(context);

		return ERR_PTR(err);

	}



	context->db_tab = mthca_init_user_db_tab(to_mdev(ibdev));

	if (IS_ERR(context->db_tab)) {

		err = PTR_ERR(context->db_tab);

		mthca_uar_free(to_mdev(ibdev), &context->uar);

		kfree(context);

		return ERR_PTR(err);

	}



	if (ib_copy_to_udata(udata, &uresp, sizeof uresp)) {

		mthca_cleanup_user_db_tab(to_mdev(ibdev), &context->uar, context->db_tab);

		mthca_uar_free(to_mdev(ibdev), &context->uar);

		kfree(context);

		return ERR_PTR(-EFAULT);

	}



	return &context->ibucontext;

}



static int mthca_dealloc_ucontext(struct ib_ucontext *context)

{

	mthca_cleanup_user_db_tab(to_mdev(context->device), &to_mucontext(context)->uar,

				  to_mucontext(context)->db_tab);

	mthca_uar_free(to_mdev(context->device), &to_mucontext(context)->uar);

	kfree(to_mucontext(context));



	return 0;

}



static struct ib_pd *mthca_alloc_pd(struct ib_device *ibdev,

				    struct ib_ucontext *context,

				    struct ib_udata *udata)
@@ -708,6 +764,8 @@ int mthca_register_device(struct mthca_dev *dev) 
	dev->ib_dev.modify_port          = mthca_modify_port;

	dev->ib_dev.query_pkey           = mthca_query_pkey;

	dev->ib_dev.query_gid            = mthca_query_gid;

	dev->ib_dev.alloc_ucontext       = mthca_alloc_ucontext;

	dev->ib_dev.dealloc_ucontext     = mthca_dealloc_ucontext;

	dev->ib_dev.alloc_pd             = mthca_alloc_pd;

	dev->ib_dev.dealloc_pd           = mthca_dealloc_pd;

	dev->ib_dev.create_ah            = mthca_ah_create;

drivers/infiniband/hw/mthca/mthca_provider.h

+14 −0
Original line number Diff line number Diff line 
/*

 * Copyright (c) 2004 Topspin Communications.  All rights reserved.

 * 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
@@ -54,6 +55,14 @@ struct mthca_uar { 
	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;

};



struct mthca_mtt;



struct mthca_mr {
@@ -236,6 +245,11 @@ struct mthca_sqp { 
	dma_addr_t      header_dma;

};



static inline struct mthca_ucontext *to_mucontext(struct ib_ucontext *ibucontext)

{

	return container_of(ibucontext, struct mthca_ucontext, ibucontext);

}



static inline struct mthca_fmr *to_mfmr(struct ib_fmr *ibmr)

{

	return container_of(ibmr, struct mthca_fmr, ibmr);