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[PATCH] IB uverbs: add mthca user QP support

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Add support for userspace queue pairs (QPs) 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 17:57:20 -07:00 committed by Linus Torvalds
parent 74c2174e7b
commit 80c8ec2c04
3 changed files with 212 additions and 85 deletions
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2
drivers/infiniband/hw/mthca/mthca_dev.h
View file

@ -440,12 +440,14 @@ int mthca_alloc_qp(struct mthca_dev *dev,
struct mthca_cq *recv_cq,
enum ib_qp_type type,
enum ib_sig_type send_policy,
struct ib_qp_cap *cap,
struct mthca_qp *qp);
int mthca_alloc_sqp(struct mthca_dev *dev,
struct mthca_pd *pd,
struct mthca_cq *send_cq,
struct mthca_cq *recv_cq,
enum ib_sig_type send_policy,
struct ib_qp_cap *cap,
int qpn,
int port,
struct mthca_sqp *sqp);

80
drivers/infiniband/hw/mthca/mthca_provider.c
View file

@ -424,6 +424,7 @@ static struct ib_qp *mthca_create_qp(struct ib_pd *pd,
struct ib_qp_init_attr *init_attr,
struct ib_udata *udata)
{
struct mthca_create_qp ucmd;
struct mthca_qp *qp;
int err;
@ -432,41 +433,82 @@ static struct ib_qp *mthca_create_qp(struct ib_pd *pd,
case IB_QPT_UC:
case IB_QPT_UD:
{
struct mthca_ucontext *context;
qp = kmalloc(sizeof *qp, GFP_KERNEL);
if (!qp)
return ERR_PTR(-ENOMEM);
qp->sq.max = init_attr->cap.max_send_wr;
qp->rq.max = init_attr->cap.max_recv_wr;
qp->sq.max_gs = init_attr->cap.max_send_sge;
qp->rq.max_gs = init_attr->cap.max_recv_sge;
if (pd->uobject) {
context = to_mucontext(pd->uobject->context);
if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd))
return ERR_PTR(-EFAULT);
err = mthca_map_user_db(to_mdev(pd->device), &context->uar,
context->db_tab,
ucmd.sq_db_index, ucmd.sq_db_page);
if (err) {
kfree(qp);
return ERR_PTR(err);
}
err = mthca_map_user_db(to_mdev(pd->device), &context->uar,
context->db_tab,
ucmd.rq_db_index, ucmd.rq_db_page);
if (err) {
mthca_unmap_user_db(to_mdev(pd->device),
&context->uar,
context->db_tab,
ucmd.sq_db_index);
kfree(qp);
return ERR_PTR(err);
}
qp->mr.ibmr.lkey = ucmd.lkey;
qp->sq.db_index = ucmd.sq_db_index;
qp->rq.db_index = ucmd.rq_db_index;
}
err = mthca_alloc_qp(to_mdev(pd->device), to_mpd(pd),
to_mcq(init_attr->send_cq),
to_mcq(init_attr->recv_cq),
init_attr->qp_type, init_attr->sq_sig_type,
qp);
&init_attr->cap, qp);
if (err && pd->uobject) {
context = to_mucontext(pd->uobject->context);
mthca_unmap_user_db(to_mdev(pd->device),
&context->uar,
context->db_tab,
ucmd.sq_db_index);
mthca_unmap_user_db(to_mdev(pd->device),
&context->uar,
context->db_tab,
ucmd.rq_db_index);
}
qp->ibqp.qp_num = qp->qpn;
break;
}
case IB_QPT_SMI:
case IB_QPT_GSI:
{
/* Don't allow userspace to create special QPs */
if (pd->uobject)
return ERR_PTR(-EINVAL);
qp = kmalloc(sizeof (struct mthca_sqp), GFP_KERNEL);
if (!qp)
return ERR_PTR(-ENOMEM);
qp->sq.max = init_attr->cap.max_send_wr;
qp->rq.max = init_attr->cap.max_recv_wr;
qp->sq.max_gs = init_attr->cap.max_send_sge;
qp->rq.max_gs = init_attr->cap.max_recv_sge;
qp->ibqp.qp_num = init_attr->qp_type == IB_QPT_SMI ? 0 : 1;
err = mthca_alloc_sqp(to_mdev(pd->device), to_mpd(pd),
to_mcq(init_attr->send_cq),
to_mcq(init_attr->recv_cq),
init_attr->sq_sig_type,
init_attr->sq_sig_type, &init_attr->cap,
qp->ibqp.qp_num, init_attr->port_num,
to_msqp(qp));
break;
@ -481,13 +523,27 @@ static struct ib_qp *mthca_create_qp(struct ib_pd *pd,
return ERR_PTR(err);
}
init_attr->cap.max_inline_data = 0;
init_attr->cap.max_inline_data = 0;
init_attr->cap.max_send_wr = qp->sq.max;
init_attr->cap.max_recv_wr = qp->rq.max;
init_attr->cap.max_send_sge = qp->sq.max_gs;
init_attr->cap.max_recv_sge = qp->rq.max_gs;
return &qp->ibqp;
}
static int mthca_destroy_qp(struct ib_qp *qp)
{
if (qp->uobject) {
mthca_unmap_user_db(to_mdev(qp->device),
&to_mucontext(qp->uobject->context)->uar,
to_mucontext(qp->uobject->context)->db_tab,
to_mqp(qp)->sq.db_index);
mthca_unmap_user_db(to_mdev(qp->device),
&to_mucontext(qp->uobject->context)->uar,
to_mucontext(qp->uobject->context)->db_tab,
to_mqp(qp)->rq.db_index);
}
mthca_free_qp(to_mdev(qp->device), to_mqp(qp));
kfree(qp);
return 0;

215
drivers/infiniband/hw/mthca/mthca_qp.c
View file

@ -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
@ -46,7 +47,9 @@ enum {
MTHCA_MAX_DIRECT_QP_SIZE = 4 * PAGE_SIZE,
MTHCA_ACK_REQ_FREQ = 10,
MTHCA_FLIGHT_LIMIT = 9,
MTHCA_UD_HEADER_SIZE = 72 /* largest UD header possible */
MTHCA_UD_HEADER_SIZE = 72, /* largest UD header possible */
MTHCA_INLINE_HEADER_SIZE = 4, /* data segment overhead for inline */
MTHCA_INLINE_CHUNK_SIZE = 16 /* inline data segment chunk */
};
enum {
@ -689,7 +692,11 @@ int mthca_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, int attr_mask)
/* leave arbel_sched_queue as 0 */
qp_context->usr_page = cpu_to_be32(dev->driver_uar.index);
if (qp->ibqp.uobject)
qp_context->usr_page =
cpu_to_be32(to_mucontext(qp->ibqp.uobject->context)->uar.index);
else
qp_context->usr_page = cpu_to_be32(dev->driver_uar.index);
qp_context->local_qpn = cpu_to_be32(qp->qpn);
if (attr_mask & IB_QP_DEST_QPN) {
qp_context->remote_qpn = cpu_to_be32(attr->dest_qp_num);
@ -954,6 +961,15 @@ static int mthca_alloc_wqe_buf(struct mthca_dev *dev,
qp->send_wqe_offset = ALIGN(qp->rq.max << qp->rq.wqe_shift,
1 << qp->sq.wqe_shift);
/*
* If this is a userspace QP, we don't actually have to
* allocate anything. All we need is to calculate the WQE
* sizes and the send_wqe_offset, so we're done now.
*/
if (pd->ibpd.uobject)
return 0;
size = PAGE_ALIGN(qp->send_wqe_offset +
(qp->sq.max << qp->sq.wqe_shift));
@ -1053,10 +1069,32 @@ static int mthca_alloc_wqe_buf(struct mthca_dev *dev,
return err;
}
static int mthca_alloc_memfree(struct mthca_dev *dev,
static void mthca_free_wqe_buf(struct mthca_dev *dev,
struct mthca_qp *qp)
{
int ret = 0;
int i;
int size = PAGE_ALIGN(qp->send_wqe_offset +
(qp->sq.max << qp->sq.wqe_shift));
if (qp->is_direct) {
dma_free_coherent(&dev->pdev->dev, size, qp->queue.direct.buf,
pci_unmap_addr(&qp->queue.direct, mapping));
} else {
for (i = 0; i < size / PAGE_SIZE; ++i) {
dma_free_coherent(&dev->pdev->dev, PAGE_SIZE,
qp->queue.page_list[i].buf,
pci_unmap_addr(&qp->queue.page_list[i],
mapping));
}
}
kfree(qp->wrid);
}
static int mthca_map_memfree(struct mthca_dev *dev,
struct mthca_qp *qp)
{
int ret;
if (mthca_is_memfree(dev)) {
ret = mthca_table_get(dev, dev->qp_table.qp_table, qp->qpn);
@ -1067,35 +1105,15 @@ static int mthca_alloc_memfree(struct mthca_dev *dev,
if (ret)
goto err_qpc;
ret = mthca_table_get(dev, dev->qp_table.rdb_table,
qp->qpn << dev->qp_table.rdb_shift);
if (ret)
goto err_eqpc;
ret = mthca_table_get(dev, dev->qp_table.rdb_table,
qp->qpn << dev->qp_table.rdb_shift);
if (ret)
goto err_eqpc;
qp->rq.db_index = mthca_alloc_db(dev, MTHCA_DB_TYPE_RQ,
qp->qpn, &qp->rq.db);
if (qp->rq.db_index < 0) {
ret = -ENOMEM;
goto err_rdb;
}
qp->sq.db_index = mthca_alloc_db(dev, MTHCA_DB_TYPE_SQ,
qp->qpn, &qp->sq.db);
if (qp->sq.db_index < 0) {
ret = -ENOMEM;
goto err_rq_db;
}
}
return 0;
err_rq_db:
mthca_free_db(dev, MTHCA_DB_TYPE_RQ, qp->rq.db_index);
err_rdb:
mthca_table_put(dev, dev->qp_table.rdb_table,
qp->qpn << dev->qp_table.rdb_shift);
err_eqpc:
mthca_table_put(dev, dev->qp_table.eqp_table, qp->qpn);
@ -1105,6 +1123,35 @@ static int mthca_alloc_memfree(struct mthca_dev *dev,
return ret;
}
static void mthca_unmap_memfree(struct mthca_dev *dev,
struct mthca_qp *qp)
{
mthca_table_put(dev, dev->qp_table.rdb_table,
qp->qpn << dev->qp_table.rdb_shift);
mthca_table_put(dev, dev->qp_table.eqp_table, qp->qpn);
mthca_table_put(dev, dev->qp_table.qp_table, qp->qpn);
}
static int mthca_alloc_memfree(struct mthca_dev *dev,
struct mthca_qp *qp)
{
int ret = 0;
if (mthca_is_memfree(dev)) {
qp->rq.db_index = mthca_alloc_db(dev, MTHCA_DB_TYPE_RQ,
qp->qpn, &qp->rq.db);
if (qp->rq.db_index < 0)
return ret;
qp->sq.db_index = mthca_alloc_db(dev, MTHCA_DB_TYPE_SQ,
qp->qpn, &qp->sq.db);
if (qp->sq.db_index < 0)
mthca_free_db(dev, MTHCA_DB_TYPE_RQ, qp->rq.db_index);
}
return ret;
}
static void mthca_free_memfree(struct mthca_dev *dev,
struct mthca_qp *qp)
{
@ -1112,11 +1159,6 @@ static void mthca_free_memfree(struct mthca_dev *dev,
mthca_free_db(dev, MTHCA_DB_TYPE_SQ, qp->sq.db_index);
mthca_free_db(dev, MTHCA_DB_TYPE_RQ, qp->rq.db_index);
}
mthca_table_put(dev, dev->qp_table.rdb_table,
qp->qpn << dev->qp_table.rdb_shift);
mthca_table_put(dev, dev->qp_table.eqp_table, qp->qpn);
mthca_table_put(dev, dev->qp_table.qp_table, qp->qpn);
}
static void mthca_wq_init(struct mthca_wq* wq)
@ -1147,13 +1189,28 @@ static int mthca_alloc_qp_common(struct mthca_dev *dev,
mthca_wq_init(&qp->sq);
mthca_wq_init(&qp->rq);
ret = mthca_alloc_memfree(dev, qp);
ret = mthca_map_memfree(dev, qp);
if (ret)
return ret;
ret = mthca_alloc_wqe_buf(dev, pd, qp);
if (ret) {
mthca_free_memfree(dev, qp);
mthca_unmap_memfree(dev, qp);
return ret;
}
/*
* If this is a userspace QP, we're done now. The doorbells
* will be allocated and buffers will be initialized in
* userspace.
*/
if (pd->ibpd.uobject)
return 0;
ret = mthca_alloc_memfree(dev, qp);
if (ret) {
mthca_free_wqe_buf(dev, qp);
mthca_unmap_memfree(dev, qp);
return ret;
}
@ -1186,22 +1243,39 @@ static int mthca_alloc_qp_common(struct mthca_dev *dev,
return 0;
}
static void mthca_align_qp_size(struct mthca_dev *dev, struct mthca_qp *qp)
static int mthca_set_qp_size(struct mthca_dev *dev, struct ib_qp_cap *cap,
struct mthca_qp *qp)
{
int i;
/* Sanity check QP size before proceeding */
if (cap->max_send_wr > 65536 || cap->max_recv_wr > 65536 ||
cap->max_send_sge > 64 || cap->max_recv_sge > 64)
return -EINVAL;
if (!mthca_is_memfree(dev))
return;
if (mthca_is_memfree(dev)) {
qp->rq.max = cap->max_recv_wr ?
roundup_pow_of_two(cap->max_recv_wr) : 0;
qp->sq.max = cap->max_send_wr ?
roundup_pow_of_two(cap->max_send_wr) : 0;
} else {
qp->rq.max = cap->max_recv_wr;
qp->sq.max = cap->max_send_wr;
}
for (i = 0; 1 << i < qp->rq.max; ++i)
; /* nothing */
qp->rq.max_gs = cap->max_recv_sge;
qp->sq.max_gs = max_t(int, cap->max_send_sge,
ALIGN(cap->max_inline_data + MTHCA_INLINE_HEADER_SIZE,
MTHCA_INLINE_CHUNK_SIZE) /
sizeof (struct mthca_data_seg));
qp->rq.max = 1 << i;
/*
* For MLX transport we need 2 extra S/G entries:
* one for the header and one for the checksum at the end
*/
if ((qp->transport == MLX && qp->sq.max_gs + 2 > dev->limits.max_sg) ||
qp->sq.max_gs > dev->limits.max_sg || qp->rq.max_gs > dev->limits.max_sg)
return -EINVAL;
for (i = 0; 1 << i < qp->sq.max; ++i)
; /* nothing */
qp->sq.max = 1 << i;
return 0;
}
int mthca_alloc_qp(struct mthca_dev *dev,
@ -1210,11 +1284,14 @@ int mthca_alloc_qp(struct mthca_dev *dev,
struct mthca_cq *recv_cq,
enum ib_qp_type type,
enum ib_sig_type send_policy,
struct ib_qp_cap *cap,
struct mthca_qp *qp)
{
int err;
mthca_align_qp_size(dev, qp);
err = mthca_set_qp_size(dev, cap, qp);
if (err)
return err;
switch (type) {
case IB_QPT_RC: qp->transport = RC; break;
@ -1247,14 +1324,17 @@ int mthca_alloc_sqp(struct mthca_dev *dev,
struct mthca_cq *send_cq,
struct mthca_cq *recv_cq,
enum ib_sig_type send_policy,
struct ib_qp_cap *cap,
int qpn,
int port,
struct mthca_sqp *sqp)
{
int err = 0;
u32 mqpn = qpn * 2 + dev->qp_table.sqp_start + port - 1;
int err;
mthca_align_qp_size(dev, &sqp->qp);
err = mthca_set_qp_size(dev, cap, &sqp->qp);
if (err)
return err;
sqp->header_buf_size = sqp->qp.sq.max * MTHCA_UD_HEADER_SIZE;
sqp->header_buf = dma_alloc_coherent(&dev->pdev->dev, sqp->header_buf_size,
@ -1313,8 +1393,6 @@ void mthca_free_qp(struct mthca_dev *dev,
struct mthca_qp *qp)
{
u8 status;
int size;
int i;
struct mthca_cq *send_cq;
struct mthca_cq *recv_cq;
@ -1344,31 +1422,22 @@ void mthca_free_qp(struct mthca_dev *dev,
if (qp->state != IB_QPS_RESET)
mthca_MODIFY_QP(dev, MTHCA_TRANS_ANY2RST, qp->qpn, 0, NULL, 0, &status);
mthca_cq_clean(dev, to_mcq(qp->ibqp.send_cq)->cqn, qp->qpn);
if (qp->ibqp.send_cq != qp->ibqp.recv_cq)
mthca_cq_clean(dev, to_mcq(qp->ibqp.recv_cq)->cqn, qp->qpn);
/*
* If this is a userspace QP, the buffers, MR, CQs and so on
* will be cleaned up in userspace, so all we have to do is
* unref the mem-free tables and free the QPN in our table.
*/
if (!qp->ibqp.uobject) {
mthca_cq_clean(dev, to_mcq(qp->ibqp.send_cq)->cqn, qp->qpn);
if (qp->ibqp.send_cq != qp->ibqp.recv_cq)
mthca_cq_clean(dev, to_mcq(qp->ibqp.recv_cq)->cqn, qp->qpn);
mthca_free_mr(dev, &qp->mr);
size = PAGE_ALIGN(qp->send_wqe_offset +
(qp->sq.max << qp->sq.wqe_shift));
if (qp->is_direct) {
pci_free_consistent(dev->pdev, size,
qp->queue.direct.buf,
pci_unmap_addr(&qp->queue.direct, mapping));
} else {
for (i = 0; i < size / PAGE_SIZE; ++i) {
pci_free_consistent(dev->pdev, PAGE_SIZE,
qp->queue.page_list[i].buf,
pci_unmap_addr(&qp->queue.page_list[i],
mapping));
}
mthca_free_mr(dev, &qp->mr);
mthca_free_memfree(dev, qp);
mthca_free_wqe_buf(dev, qp);
}
kfree(qp->wrid);
mthca_free_memfree(dev, qp);
mthca_unmap_memfree(dev, qp);
if (is_sqp(dev, qp)) {
atomic_dec(&(to_mpd(qp->ibqp.pd)->sqp_count));