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[PATCH] IB uverbs: add mthca user CQ support

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Add support for userspace completion queues (CQs) 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>
This commit is contained in:
Roland Dreier 2005-07-07 17:57:19 -07:00 committed by Linus Torvalds
parent 24d4281be0
commit 74c2174e7b
4 changed files with 110 additions and 37 deletions
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76
drivers/infiniband/hw/mthca/mthca_cq.c
View file

@ -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, Inc. 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
@ -742,6 +743,7 @@ static int mthca_alloc_cq_buf(struct mthca_dev *dev, int size,
}
int mthca_init_cq(struct mthca_dev *dev, int nent,
struct mthca_ucontext *ctx, u32 pdn,
struct mthca_cq *cq)
{
int size = nent * MTHCA_CQ_ENTRY_SIZE;
@ -753,30 +755,33 @@ int mthca_init_cq(struct mthca_dev *dev, int nent,
might_sleep();
cq->ibcq.cqe = nent - 1;
cq->ibcq.cqe = nent - 1;
cq->is_kernel = !ctx;
cq->cqn = mthca_alloc(&dev->cq_table.alloc);
if (cq->cqn == -1)
return -ENOMEM;
if (mthca_is_memfree(dev)) {
cq->arm_sn = 1;
err = mthca_table_get(dev, dev->cq_table.table, cq->cqn);
if (err)
goto err_out;
err = -ENOMEM;
if (cq->is_kernel) {
cq->arm_sn = 1;
cq->set_ci_db_index = mthca_alloc_db(dev, MTHCA_DB_TYPE_CQ_SET_CI,
cq->cqn, &cq->set_ci_db);
if (cq->set_ci_db_index < 0)
goto err_out_icm;
err = -ENOMEM;
cq->arm_db_index = mthca_alloc_db(dev, MTHCA_DB_TYPE_CQ_ARM,
cq->cqn, &cq->arm_db);
if (cq->arm_db_index < 0)
goto err_out_ci;
cq->set_ci_db_index = mthca_alloc_db(dev, MTHCA_DB_TYPE_CQ_SET_CI,
cq->cqn, &cq->set_ci_db);
if (cq->set_ci_db_index < 0)
goto err_out_icm;
cq->arm_db_index = mthca_alloc_db(dev, MTHCA_DB_TYPE_CQ_ARM,
cq->cqn, &cq->arm_db);
if (cq->arm_db_index < 0)
goto err_out_ci;
}
}
mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL);
@ -785,12 +790,14 @@ int mthca_init_cq(struct mthca_dev *dev, int nent,
cq_context = mailbox->buf;
err = mthca_alloc_cq_buf(dev, size, cq);
if (err)
goto err_out_mailbox;
if (cq->is_kernel) {
err = mthca_alloc_cq_buf(dev, size, cq);
if (err)
goto err_out_mailbox;
for (i = 0; i < nent; ++i)
set_cqe_hw(get_cqe(cq, i));
for (i = 0; i < nent; ++i)
set_cqe_hw(get_cqe(cq, i));
}
spin_lock_init(&cq->lock);
atomic_set(&cq->refcount, 1);
@ -801,11 +808,14 @@ int mthca_init_cq(struct mthca_dev *dev, int nent,
MTHCA_CQ_STATE_DISARMED |
MTHCA_CQ_FLAG_TR);
cq_context->start = cpu_to_be64(0);
cq_context->logsize_usrpage = cpu_to_be32((ffs(nent) - 1) << 24 |
dev->driver_uar.index);
cq_context->logsize_usrpage = cpu_to_be32((ffs(nent) - 1) << 24);
if (ctx)
cq_context->logsize_usrpage |= cpu_to_be32(ctx->uar.index);
else
cq_context->logsize_usrpage |= cpu_to_be32(dev->driver_uar.index);
cq_context->error_eqn = cpu_to_be32(dev->eq_table.eq[MTHCA_EQ_ASYNC].eqn);
cq_context->comp_eqn = cpu_to_be32(dev->eq_table.eq[MTHCA_EQ_COMP].eqn);
cq_context->pd = cpu_to_be32(dev->driver_pd.pd_num);
cq_context->pd = cpu_to_be32(pdn);
cq_context->lkey = cpu_to_be32(cq->mr.ibmr.lkey);
cq_context->cqn = cpu_to_be32(cq->cqn);
@ -843,18 +853,20 @@ int mthca_init_cq(struct mthca_dev *dev, int nent,
return 0;
err_out_free_mr:
mthca_free_mr(dev, &cq->mr);
mthca_free_cq_buf(dev, cq);
if (cq->is_kernel) {
mthca_free_mr(dev, &cq->mr);
mthca_free_cq_buf(dev, cq);
}
err_out_mailbox:
mthca_free_mailbox(dev, mailbox);
err_out_arm:
if (mthca_is_memfree(dev))
if (cq->is_kernel && mthca_is_memfree(dev))
mthca_free_db(dev, MTHCA_DB_TYPE_CQ_ARM, cq->arm_db_index);
err_out_ci:
if (mthca_is_memfree(dev))
if (cq->is_kernel && mthca_is_memfree(dev))
mthca_free_db(dev, MTHCA_DB_TYPE_CQ_SET_CI, cq->set_ci_db_index);
err_out_icm:
@ -892,7 +904,8 @@ void mthca_free_cq(struct mthca_dev *dev,
int j;
printk(KERN_ERR "context for CQN %x (cons index %x, next sw %d)\n",
cq->cqn, cq->cons_index, !!next_cqe_sw(cq));
cq->cqn, cq->cons_index,
cq->is_kernel ? !!next_cqe_sw(cq) : 0);
for (j = 0; j < 16; ++j)
printk(KERN_ERR "[%2x] %08x\n", j * 4, be32_to_cpu(ctx[j]));
}
@ -910,12 +923,13 @@ void mthca_free_cq(struct mthca_dev *dev,
atomic_dec(&cq->refcount);
wait_event(cq->wait, !atomic_read(&cq->refcount));
mthca_free_mr(dev, &cq->mr);
mthca_free_cq_buf(dev, cq);
if (mthca_is_memfree(dev)) {
mthca_free_db(dev, MTHCA_DB_TYPE_CQ_ARM, cq->arm_db_index);
mthca_free_db(dev, MTHCA_DB_TYPE_CQ_SET_CI, cq->set_ci_db_index);
if (cq->is_kernel) {
mthca_free_mr(dev, &cq->mr);
mthca_free_cq_buf(dev, cq);
if (mthca_is_memfree(dev)) {
mthca_free_db(dev, MTHCA_DB_TYPE_CQ_ARM, cq->arm_db_index);
mthca_free_db(dev, MTHCA_DB_TYPE_CQ_SET_CI, cq->set_ci_db_index);
}
}
mthca_table_put(dev, dev->cq_table.table, cq->cqn);

1
drivers/infiniband/hw/mthca/mthca_dev.h
View file

@ -414,6 +414,7 @@ int mthca_poll_cq(struct ib_cq *ibcq, int num_entries,
int mthca_tavor_arm_cq(struct ib_cq *cq, enum ib_cq_notify notify);
int mthca_arbel_arm_cq(struct ib_cq *cq, enum ib_cq_notify notify);
int mthca_init_cq(struct mthca_dev *dev, int nent,
struct mthca_ucontext *ctx, u32 pdn,
struct mthca_cq *cq);
void mthca_free_cq(struct mthca_dev *dev,
struct mthca_cq *cq);

69
drivers/infiniband/hw/mthca/mthca_provider.c
View file

@ -497,28 +497,85 @@ static struct ib_cq *mthca_create_cq(struct ib_device *ibdev, int entries,
struct ib_ucontext *context,
struct ib_udata *udata)
{
struct mthca_create_cq ucmd;
struct mthca_cq *cq;
int nent;
int err;
if (context) {
if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd))
return ERR_PTR(-EFAULT);
err = mthca_map_user_db(to_mdev(ibdev), &to_mucontext(context)->uar,
to_mucontext(context)->db_tab,
ucmd.set_db_index, ucmd.set_db_page);
if (err)
return ERR_PTR(err);
err = mthca_map_user_db(to_mdev(ibdev), &to_mucontext(context)->uar,
to_mucontext(context)->db_tab,
ucmd.arm_db_index, ucmd.arm_db_page);
if (err)
goto err_unmap_set;
}
cq = kmalloc(sizeof *cq, GFP_KERNEL);
if (!cq)
return ERR_PTR(-ENOMEM);
if (!cq) {
err = -ENOMEM;
goto err_unmap_arm;
}
if (context) {
cq->mr.ibmr.lkey = ucmd.lkey;
cq->set_ci_db_index = ucmd.set_db_index;
cq->arm_db_index = ucmd.arm_db_index;
}
for (nent = 1; nent <= entries; nent <<= 1)
; /* nothing */
err = mthca_init_cq(to_mdev(ibdev), nent, cq);
if (err) {
kfree(cq);
cq = ERR_PTR(err);
err = mthca_init_cq(to_mdev(ibdev), nent,
context ? to_mucontext(context) : NULL,
context ? ucmd.pdn : to_mdev(ibdev)->driver_pd.pd_num,
cq);
if (err)
goto err_free;
if (context && ib_copy_to_udata(udata, &cq->cqn, sizeof (__u32))) {
mthca_free_cq(to_mdev(ibdev), cq);
goto err_free;
}
return &cq->ibcq;
err_free:
kfree(cq);
err_unmap_arm:
if (context)
mthca_unmap_user_db(to_mdev(ibdev), &to_mucontext(context)->uar,
to_mucontext(context)->db_tab, ucmd.arm_db_index);
err_unmap_set:
if (context)
mthca_unmap_user_db(to_mdev(ibdev), &to_mucontext(context)->uar,
to_mucontext(context)->db_tab, ucmd.set_db_index);
return ERR_PTR(err);
}
static int mthca_destroy_cq(struct ib_cq *cq)
{
if (cq->uobject) {
mthca_unmap_user_db(to_mdev(cq->device),
&to_mucontext(cq->uobject->context)->uar,
to_mucontext(cq->uobject->context)->db_tab,
to_mcq(cq)->arm_db_index);
mthca_unmap_user_db(to_mdev(cq->device),
&to_mucontext(cq->uobject->context)->uar,
to_mucontext(cq->uobject->context)->db_tab,
to_mcq(cq)->set_ci_db_index);
}
mthca_free_cq(to_mdev(cq->device), to_mcq(cq));
kfree(cq);

1
drivers/infiniband/hw/mthca/mthca_provider.h
View file

@ -177,6 +177,7 @@ struct mthca_cq {
int cqn;
u32 cons_index;
int is_direct;
int is_kernel;
/* Next fields are Arbel only */
int set_ci_db_index;