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authorRoland Dreier <rolandd@cisco.com>2005-07-07 17:57:16 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2005-07-07 18:23:49 -0700
commit5e0b537c7d94efe3fea0fee8e2533c3231a8af75 (patch)
tree108ecc2bd5c9fabc86f1c51b2e77421cf78ce433 /drivers/infiniband
parent56483ec1b70221f8c9838ccc9a89b43d9de66993 (diff)
downloadop-kernel-dev-5e0b537c7d94efe3fea0fee8e2533c3231a8af75.zip
op-kernel-dev-5e0b537c7d94efe3fea0fee8e2533c3231a8af75.tar.gz
[PATCH] IB uverbs: add mthca user context support
Add support for managing userspace contexts to mthca. Signed-off-by: Roland Dreier <rolandd@cisco.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/infiniband')
-rw-r--r--drivers/infiniband/hw/mthca/mthca_provider.c58
-rw-r--r--drivers/infiniband/hw/mthca/mthca_provider.h14
2 files changed, 72 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/mthca/mthca_provider.c b/drivers/infiniband/hw/mthca/mthca_provider.c
index 0cc86f8..bfd33a4 100644
--- a/drivers/infiniband/hw/mthca/mthca_provider.c
+++ b/drivers/infiniband/hw/mthca/mthca_provider.c
@@ -1,6 +1,7 @@
/*
* 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;
diff --git a/drivers/infiniband/hw/mthca/mthca_provider.h b/drivers/infiniband/hw/mthca/mthca_provider.h
index 4d976cc..27cd43c 100644
--- a/drivers/infiniband/hw/mthca/mthca_provider.h
+++ b/drivers/infiniband/hw/mthca/mthca_provider.h
@@ -1,5 +1,6 @@
/*
* 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);
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