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alistair23-linux/drivers/infiniband/hw/mthca/mthca_provider.c
Jack Morgenstein 59fef3b1e9 IB/mthca: Fix max_srq_sge returned by ib_query_device for Tavor devices 
The driver allocates SRQ WQEs size with a power of 2 size both for
Tavor and for memfree. For Tavor, however, the hardware only requires
the WQE size to be a multiple of 16, not a power of 2, and the max
number of scatter-gather allowed is reported accordingly by the
firmware (and this is the value currently returned by
ib_query_device() and ibv_query_device()).

If the max number of scatter/gather entries reported by the FW is used
when creating an SRQ, the creation will fail for Tavor, since the
required WQE size will be increased to the next power of 2, which
turns out to be larger than the device permitted max WQE size (which
is not a power of 2).

This patch reduces the reported SRQ max wqe size so that it can be used
successfully in creating an SRQ on Tavor HCAs.

Signed-off-by: Jack Morgenstein <jackm@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-04-12 11:42:30 -07:00

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/*
* Copyright (c) 2004, 2005 Topspin Communications. All rights reserved.
* Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
* Copyright (c) 2005, 2006 Cisco Systems. All rights reserved.
* Copyright (c) 2005 Mellanox Technologies. All rights reserved.
* Copyright (c) 2004 Voltaire, 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
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* 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.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* $Id: mthca_provider.c 4859 2006-01-09 21:55:10Z roland $
*/
#include <rdma/ib_smi.h>
#include <rdma/ib_user_verbs.h>
#include <linux/mm.h>
#include "mthca_dev.h"
#include "mthca_cmd.h"
#include "mthca_user.h"
#include "mthca_memfree.h"
static void init_query_mad(struct ib_smp *mad)
{
mad->base_version = 1;
mad->mgmt_class = IB_MGMT_CLASS_SUBN_LID_ROUTED;
mad->class_version = 1;
mad->method = IB_MGMT_METHOD_GET;
}
static int mthca_query_device(struct ib_device *ibdev,
struct ib_device_attr *props)
{
struct ib_smp *in_mad = NULL;
struct ib_smp *out_mad = NULL;
int err = -ENOMEM;
struct mthca_dev* mdev = to_mdev(ibdev);
u8 status;
in_mad = kzalloc(sizeof *in_mad, GFP_KERNEL);
out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
if (!in_mad || !out_mad)
goto out;
memset(props, 0, sizeof *props);
props->fw_ver = mdev->fw_ver;
init_query_mad(in_mad);
in_mad->attr_id = IB_SMP_ATTR_NODE_INFO;
err = mthca_MAD_IFC(mdev, 1, 1,
1, NULL, NULL, in_mad, out_mad,
&status);
if (err)
goto out;
if (status) {
err = -EINVAL;
goto out;
}
props->device_cap_flags = mdev->device_cap_flags;
props->vendor_id = be32_to_cpup((__be32 *) (out_mad->data + 36)) &
0xffffff;
props->vendor_part_id = be16_to_cpup((__be16 *) (out_mad->data + 30));
props->hw_ver = be32_to_cpup((__be32 *) (out_mad->data + 32));
memcpy(&props->sys_image_guid, out_mad->data + 4, 8);
props->max_mr_size = ~0ull;
props->page_size_cap = mdev->limits.page_size_cap;
props->max_qp = mdev->limits.num_qps - mdev->limits.reserved_qps;
props->max_qp_wr = mdev->limits.max_wqes;
props->max_sge = mdev->limits.max_sg;
props->max_cq = mdev->limits.num_cqs - mdev->limits.reserved_cqs;
props->max_cqe = mdev->limits.max_cqes;
props->max_mr = mdev->limits.num_mpts - mdev->limits.reserved_mrws;
props->max_pd = mdev->limits.num_pds - mdev->limits.reserved_pds;
props->max_qp_rd_atom = 1 << mdev->qp_table.rdb_shift;
props->max_qp_init_rd_atom = mdev->limits.max_qp_init_rdma;
props->max_res_rd_atom = props->max_qp_rd_atom * props->max_qp;
props->max_srq = mdev->limits.num_srqs - mdev->limits.reserved_srqs;
props->max_srq_wr = mdev->limits.max_srq_wqes;
props->max_srq_sge = mdev->limits.max_srq_sge;
props->local_ca_ack_delay = mdev->limits.local_ca_ack_delay;
props->atomic_cap = mdev->limits.flags & DEV_LIM_FLAG_ATOMIC ?
IB_ATOMIC_HCA : IB_ATOMIC_NONE;
props->max_pkeys = mdev->limits.pkey_table_len;
props->max_mcast_grp = mdev->limits.num_mgms + mdev->limits.num_amgms;
props->max_mcast_qp_attach = MTHCA_QP_PER_MGM;
props->max_total_mcast_qp_attach = props->max_mcast_qp_attach *
props->max_mcast_grp;
err = 0;
out:
kfree(in_mad);
kfree(out_mad);
return err;
}
static int mthca_query_port(struct ib_device *ibdev,
u8 port, struct ib_port_attr *props)
{
struct ib_smp *in_mad = NULL;
struct ib_smp *out_mad = NULL;
int err = -ENOMEM;
u8 status;
in_mad = kzalloc(sizeof *in_mad, GFP_KERNEL);
out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
if (!in_mad || !out_mad)
goto out;
memset(props, 0, sizeof *props);
init_query_mad(in_mad);
in_mad->attr_id = IB_SMP_ATTR_PORT_INFO;
in_mad->attr_mod = cpu_to_be32(port);
err = mthca_MAD_IFC(to_mdev(ibdev), 1, 1,
port, NULL, NULL, in_mad, out_mad,
&status);
if (err)
goto out;
if (status) {
err = -EINVAL;
goto out;
}
props->lid = be16_to_cpup((__be16 *) (out_mad->data + 16));
props->lmc = out_mad->data[34] & 0x7;
props->sm_lid = be16_to_cpup((__be16 *) (out_mad->data + 18));
props->sm_sl = out_mad->data[36] & 0xf;
props->state = out_mad->data[32] & 0xf;
props->phys_state = out_mad->data[33] >> 4;
props->port_cap_flags = be32_to_cpup((__be32 *) (out_mad->data + 20));
props->gid_tbl_len = to_mdev(ibdev)->limits.gid_table_len;
props->max_msg_sz = 0x80000000;
props->pkey_tbl_len = to_mdev(ibdev)->limits.pkey_table_len;
props->bad_pkey_cntr = be16_to_cpup((__be16 *) (out_mad->data + 46));
props->qkey_viol_cntr = be16_to_cpup((__be16 *) (out_mad->data + 48));
props->active_width = out_mad->data[31] & 0xf;
props->active_speed = out_mad->data[35] >> 4;
props->max_mtu = out_mad->data[41] & 0xf;
props->active_mtu = out_mad->data[36] >> 4;
props->subnet_timeout = out_mad->data[51] & 0x1f;
out:
kfree(in_mad);
kfree(out_mad);
return err;
}
static int mthca_modify_device(struct ib_device *ibdev,
int mask,
struct ib_device_modify *props)
{
if (mask & ~IB_DEVICE_MODIFY_NODE_DESC)
return -EOPNOTSUPP;
if (mask & IB_DEVICE_MODIFY_NODE_DESC) {
if (mutex_lock_interruptible(&to_mdev(ibdev)->cap_mask_mutex))
return -ERESTARTSYS;
memcpy(ibdev->node_desc, props->node_desc, 64);
mutex_unlock(&to_mdev(ibdev)->cap_mask_mutex);
}
return 0;
}
static int mthca_modify_port(struct ib_device *ibdev,
u8 port, int port_modify_mask,
struct ib_port_modify *props)
{
struct mthca_set_ib_param set_ib;
struct ib_port_attr attr;
int err;
u8 status;
if (mutex_lock_interruptible(&to_mdev(ibdev)->cap_mask_mutex))
return -ERESTARTSYS;
err = mthca_query_port(ibdev, port, &attr);
if (err)
goto out;
set_ib.set_si_guid = 0;
set_ib.reset_qkey_viol = !!(port_modify_mask & IB_PORT_RESET_QKEY_CNTR);
set_ib.cap_mask = (attr.port_cap_flags | props->set_port_cap_mask) &
~props->clr_port_cap_mask;
err = mthca_SET_IB(to_mdev(ibdev), &set_ib, port, &status);
if (err)
goto out;
if (status) {
err = -EINVAL;
goto out;
}
out:
mutex_unlock(&to_mdev(ibdev)->cap_mask_mutex);
return err;
}
static int mthca_query_pkey(struct ib_device *ibdev,
u8 port, u16 index, u16 *pkey)
{
struct ib_smp *in_mad = NULL;
struct ib_smp *out_mad = NULL;
int err = -ENOMEM;
u8 status;
in_mad = kzalloc(sizeof *in_mad, GFP_KERNEL);
out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
if (!in_mad || !out_mad)
goto out;
init_query_mad(in_mad);
in_mad->attr_id = IB_SMP_ATTR_PKEY_TABLE;
in_mad->attr_mod = cpu_to_be32(index / 32);
err = mthca_MAD_IFC(to_mdev(ibdev), 1, 1,
port, NULL, NULL, in_mad, out_mad,
&status);
if (err)
goto out;
if (status) {
err = -EINVAL;
goto out;
}
*pkey = be16_to_cpu(((__be16 *) out_mad->data)[index % 32]);
out:
kfree(in_mad);
kfree(out_mad);
return err;
}
static int mthca_query_gid(struct ib_device *ibdev, u8 port,
int index, union ib_gid *gid)
{
struct ib_smp *in_mad = NULL;
struct ib_smp *out_mad = NULL;
int err = -ENOMEM;
u8 status;
in_mad = kzalloc(sizeof *in_mad, GFP_KERNEL);
out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
if (!in_mad || !out_mad)
goto out;
init_query_mad(in_mad);
in_mad->attr_id = IB_SMP_ATTR_PORT_INFO;
in_mad->attr_mod = cpu_to_be32(port);
err = mthca_MAD_IFC(to_mdev(ibdev), 1, 1,
port, NULL, NULL, in_mad, out_mad,
&status);
if (err)
goto out;
if (status) {
err = -EINVAL;
goto out;
}
memcpy(gid->raw, out_mad->data + 8, 8);
init_query_mad(in_mad);
in_mad->attr_id = IB_SMP_ATTR_GUID_INFO;
in_mad->attr_mod = cpu_to_be32(index / 8);
err = mthca_MAD_IFC(to_mdev(ibdev), 1, 1,
port, NULL, NULL, in_mad, out_mad,
&status);
if (err)
goto out;
if (status) {
err = -EINVAL;
goto out;
}
memcpy(gid->raw + 8, out_mad->data + (index % 8) * 16, 8);
out:
kfree(in_mad);
kfree(out_mad);
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 int mthca_mmap_uar(struct ib_ucontext *context,
struct vm_area_struct *vma)
{
if (vma->vm_end - vma->vm_start != PAGE_SIZE)
return -EINVAL;
vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
if (io_remap_pfn_range(vma, vma->vm_start,
to_mucontext(context)->uar.pfn,
PAGE_SIZE, vma->vm_page_prot))
return -EAGAIN;
return 0;
}
static struct ib_pd *mthca_alloc_pd(struct ib_device *ibdev,
struct ib_ucontext *context,
struct ib_udata *udata)
{
struct mthca_pd *pd;
int err;
pd = kmalloc(sizeof *pd, GFP_KERNEL);
if (!pd)
return ERR_PTR(-ENOMEM);
err = mthca_pd_alloc(to_mdev(ibdev), !context, pd);
if (err) {
kfree(pd);
return ERR_PTR(err);
}
if (context) {
if (ib_copy_to_udata(udata, &pd->pd_num, sizeof (__u32))) {
mthca_pd_free(to_mdev(ibdev), pd);
kfree(pd);
return ERR_PTR(-EFAULT);
}
}
return &pd->ibpd;
}
static int mthca_dealloc_pd(struct ib_pd *pd)
{
mthca_pd_free(to_mdev(pd->device), to_mpd(pd));
kfree(pd);
return 0;
}
static struct ib_ah *mthca_ah_create(struct ib_pd *pd,
struct ib_ah_attr *ah_attr)
{
int err;
struct mthca_ah *ah;
ah = kmalloc(sizeof *ah, GFP_ATOMIC);
if (!ah)
return ERR_PTR(-ENOMEM);
err = mthca_create_ah(to_mdev(pd->device), to_mpd(pd), ah_attr, ah);
if (err) {
kfree(ah);
return ERR_PTR(err);
}
return &ah->ibah;
}
static int mthca_ah_destroy(struct ib_ah *ah)
{
mthca_destroy_ah(to_mdev(ah->device), to_mah(ah));
kfree(ah);
return 0;
}
static struct ib_srq *mthca_create_srq(struct ib_pd *pd,
struct ib_srq_init_attr *init_attr,
struct ib_udata *udata)
{
struct mthca_create_srq ucmd;
struct mthca_ucontext *context = NULL;
struct mthca_srq *srq;
int err;
srq = kmalloc(sizeof *srq, GFP_KERNEL);
if (!srq)
return ERR_PTR(-ENOMEM);
if (pd->uobject) {
context = to_mucontext(pd->uobject->context);
if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd)) {
err = -EFAULT;
goto err_free;
}
err = mthca_map_user_db(to_mdev(pd->device), &context->uar,
context->db_tab, ucmd.db_index,
ucmd.db_page);
if (err)
goto err_free;
srq->mr.ibmr.lkey = ucmd.lkey;
srq->db_index = ucmd.db_index;
}
err = mthca_alloc_srq(to_mdev(pd->device), to_mpd(pd),
&init_attr->attr, srq);
if (err && pd->uobject)
mthca_unmap_user_db(to_mdev(pd->device), &context->uar,
context->db_tab, ucmd.db_index);
if (err)
goto err_free;
if (context && ib_copy_to_udata(udata, &srq->srqn, sizeof (__u32))) {
mthca_free_srq(to_mdev(pd->device), srq);
err = -EFAULT;
goto err_free;
}
return &srq->ibsrq;
err_free:
kfree(srq);
return ERR_PTR(err);
}
static int mthca_destroy_srq(struct ib_srq *srq)
{
struct mthca_ucontext *context;
if (srq->uobject) {
context = to_mucontext(srq->uobject->context);
mthca_unmap_user_db(to_mdev(srq->device), &context->uar,
context->db_tab, to_msrq(srq)->db_index);
}
mthca_free_srq(to_mdev(srq->device), to_msrq(srq));
kfree(srq);
return 0;
}
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;
switch (init_attr->qp_type) {
case IB_QPT_RC:
case IB_QPT_UC:
case IB_QPT_UD:
{
struct mthca_ucontext *context;
qp = kmalloc(sizeof *qp, GFP_KERNEL);
if (!qp)
return ERR_PTR(-ENOMEM);
if (pd->uobject) {
context = to_mucontext(pd->uobject->context);
if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd)) {
kfree(qp);
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,
&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->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->cap,
qp->ibqp.qp_num, init_attr->port_num,
to_msqp(qp));
break;
}
default:
/* Don't support raw QPs */
return ERR_PTR(-ENOSYS);
}
if (err) {
kfree(qp);
return ERR_PTR(err);
}
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;
init_attr->cap.max_inline_data = qp->max_inline_data;
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;
}
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 (entries < 1 || entries > to_mdev(ibdev)->limits.max_cqes)
return ERR_PTR(-EINVAL);
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) {
err = -ENOMEM;
goto err_unmap_arm;
}
if (context) {
cq->buf.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,
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;
}
cq->resize_buf = NULL;
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_alloc_resize_buf(struct mthca_dev *dev, struct mthca_cq *cq,
int entries)
{
int ret;
spin_lock_irq(&cq->lock);
if (cq->resize_buf) {
ret = -EBUSY;
goto unlock;
}
cq->resize_buf = kmalloc(sizeof *cq->resize_buf, GFP_ATOMIC);
if (!cq->resize_buf) {
ret = -ENOMEM;
goto unlock;
}
cq->resize_buf->state = CQ_RESIZE_ALLOC;
ret = 0;
unlock:
spin_unlock_irq(&cq->lock);
if (ret)
return ret;
ret = mthca_alloc_cq_buf(dev, &cq->resize_buf->buf, entries);
if (ret) {
spin_lock_irq(&cq->lock);
kfree(cq->resize_buf);
cq->resize_buf = NULL;
spin_unlock_irq(&cq->lock);
return ret;
}
cq->resize_buf->cqe = entries - 1;
spin_lock_irq(&cq->lock);
cq->resize_buf->state = CQ_RESIZE_READY;
spin_unlock_irq(&cq->lock);
return 0;
}
static int mthca_resize_cq(struct ib_cq *ibcq, int entries, struct ib_udata *udata)
{
struct mthca_dev *dev = to_mdev(ibcq->device);
struct mthca_cq *cq = to_mcq(ibcq);
struct mthca_resize_cq ucmd;
u32 lkey;
u8 status;
int ret;
if (entries < 1 || entries > dev->limits.max_cqes)
return -EINVAL;
entries = roundup_pow_of_two(entries + 1);
if (entries == ibcq->cqe + 1)
return 0;
if (cq->is_kernel) {
ret = mthca_alloc_resize_buf(dev, cq, entries);
if (ret)
return ret;
lkey = cq->resize_buf->buf.mr.ibmr.lkey;
} else {
if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd))
return -EFAULT;
lkey = ucmd.lkey;
}
ret = mthca_RESIZE_CQ(dev, cq->cqn, lkey, long_log2(entries), &status);
if (status)
ret = -EINVAL;
if (ret) {
if (cq->resize_buf) {
mthca_free_cq_buf(dev, &cq->resize_buf->buf,
cq->resize_buf->cqe);
kfree(cq->resize_buf);
spin_lock_irq(&cq->lock);
cq->resize_buf = NULL;
spin_unlock_irq(&cq->lock);
}
return ret;
}
if (cq->is_kernel) {
struct mthca_cq_buf tbuf;
int tcqe;
spin_lock_irq(&cq->lock);
if (cq->resize_buf->state == CQ_RESIZE_READY) {
mthca_cq_resize_copy_cqes(cq);
tbuf = cq->buf;
tcqe = cq->ibcq.cqe;
cq->buf = cq->resize_buf->buf;
cq->ibcq.cqe = cq->resize_buf->cqe;
} else {
tbuf = cq->resize_buf->buf;
tcqe = cq->resize_buf->cqe;
}
kfree(cq->resize_buf);
cq->resize_buf = NULL;
spin_unlock_irq(&cq->lock);
mthca_free_cq_buf(dev, &tbuf, tcqe);
} else
ibcq->cqe = entries - 1;
return 0;
}
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);
return 0;
}
static inline u32 convert_access(int acc)
{
return (acc & IB_ACCESS_REMOTE_ATOMIC ? MTHCA_MPT_FLAG_ATOMIC : 0) |
(acc & IB_ACCESS_REMOTE_WRITE ? MTHCA_MPT_FLAG_REMOTE_WRITE : 0) |
(acc & IB_ACCESS_REMOTE_READ ? MTHCA_MPT_FLAG_REMOTE_READ : 0) |
(acc & IB_ACCESS_LOCAL_WRITE ? MTHCA_MPT_FLAG_LOCAL_WRITE : 0) |
MTHCA_MPT_FLAG_LOCAL_READ;
}
static struct ib_mr *mthca_get_dma_mr(struct ib_pd *pd, int acc)
{
struct mthca_mr *mr;
int err;
mr = kmalloc(sizeof *mr, GFP_KERNEL);
if (!mr)
return ERR_PTR(-ENOMEM);
err = mthca_mr_alloc_notrans(to_mdev(pd->device),
to_mpd(pd)->pd_num,
convert_access(acc), mr);
if (err) {
kfree(mr);
return ERR_PTR(err);
}
return &mr->ibmr;
}
static struct ib_mr *mthca_reg_phys_mr(struct ib_pd *pd,
struct ib_phys_buf *buffer_list,
int num_phys_buf,
int acc,
u64 *iova_start)
{
struct mthca_mr *mr;
u64 *page_list;
u64 total_size;
u64 mask;
int shift;
int npages;
int err;
int i, j, n;
/* First check that we have enough alignment */
if ((*iova_start & ~PAGE_MASK) != (buffer_list[0].addr & ~PAGE_MASK))
return ERR_PTR(-EINVAL);
mask = 0;
total_size = 0;
for (i = 0; i < num_phys_buf; ++i) {
if (i != 0)
mask |= buffer_list[i].addr;
if (i != num_phys_buf - 1)
mask |= buffer_list[i].addr + buffer_list[i].size;
total_size += buffer_list[i].size;
}
if (mask & ~PAGE_MASK)
return ERR_PTR(-EINVAL);
/* Find largest page shift we can use to cover buffers */
for (shift = PAGE_SHIFT; shift < 31; ++shift)
if (num_phys_buf > 1) {
if ((1ULL << shift) & mask)
break;
} else {
if (1ULL << shift >=
buffer_list[0].size +
(buffer_list[0].addr & ((1ULL << shift) - 1)))
break;
}
buffer_list[0].size += buffer_list[0].addr & ((1ULL << shift) - 1);
buffer_list[0].addr &= ~0ull << shift;
mr = kmalloc(sizeof *mr, GFP_KERNEL);
if (!mr)
return ERR_PTR(-ENOMEM);
npages = 0;
for (i = 0; i < num_phys_buf; ++i)
npages += (buffer_list[i].size + (1ULL << shift) - 1) >> shift;
if (!npages)
return &mr->ibmr;
page_list = kmalloc(npages * sizeof *page_list, GFP_KERNEL);
if (!page_list) {
kfree(mr);
return ERR_PTR(-ENOMEM);
}
n = 0;
for (i = 0; i < num_phys_buf; ++i)
for (j = 0;
j < (buffer_list[i].size + (1ULL << shift) - 1) >> shift;
++j)
page_list[n++] = buffer_list[i].addr + ((u64) j << shift);
mthca_dbg(to_mdev(pd->device), "Registering memory at %llx (iova %llx) "
"in PD %x; shift %d, npages %d.\n",
(unsigned long long) buffer_list[0].addr,
(unsigned long long) *iova_start,
to_mpd(pd)->pd_num,
shift, npages);
err = mthca_mr_alloc_phys(to_mdev(pd->device),
to_mpd(pd)->pd_num,
page_list, shift, npages,
*iova_start, total_size,
convert_access(acc), mr);
if (err) {
kfree(page_list);
kfree(mr);
return ERR_PTR(err);
}
kfree(page_list);
return &mr->ibmr;
}
static struct ib_mr *mthca_reg_user_mr(struct ib_pd *pd, struct ib_umem *region,
int acc, struct ib_udata *udata)
{
struct mthca_dev *dev = to_mdev(pd->device);
struct ib_umem_chunk *chunk;
struct mthca_mr *mr;
u64 *pages;
int shift, n, len;
int i, j, k;
int err = 0;
shift = ffs(region->page_size) - 1;
mr = kmalloc(sizeof *mr, GFP_KERNEL);
if (!mr)
return ERR_PTR(-ENOMEM);
n = 0;
list_for_each_entry(chunk, &region->chunk_list, list)
n += chunk->nents;
mr->mtt = mthca_alloc_mtt(dev, n);
if (IS_ERR(mr->mtt)) {
err = PTR_ERR(mr->mtt);
goto err;
}
pages = (u64 *) __get_free_page(GFP_KERNEL);
if (!pages) {
err = -ENOMEM;
goto err_mtt;
}
i = n = 0;
list_for_each_entry(chunk, &region->chunk_list, list)
for (j = 0; j < chunk->nmap; ++j) {
len = sg_dma_len(&chunk->page_list[j]) >> shift;
for (k = 0; k < len; ++k) {
pages[i++] = sg_dma_address(&chunk->page_list[j]) +
region->page_size * k;
/*
* Be friendly to WRITE_MTT command
* and leave two empty slots for the
* index and reserved fields of the
* mailbox.
*/
if (i == PAGE_SIZE / sizeof (u64) - 2) {
err = mthca_write_mtt(dev, mr->mtt,
n, pages, i);
if (err)
goto mtt_done;
n += i;
i = 0;
}
}
}
if (i)
err = mthca_write_mtt(dev, mr->mtt, n, pages, i);
mtt_done:
free_page((unsigned long) pages);
if (err)
goto err_mtt;
err = mthca_mr_alloc(dev, to_mpd(pd)->pd_num, shift, region->virt_base,
region->length, convert_access(acc), mr);
if (err)
goto err_mtt;
return &mr->ibmr;
err_mtt:
mthca_free_mtt(dev, mr->mtt);
err:
kfree(mr);
return ERR_PTR(err);
}
static int mthca_dereg_mr(struct ib_mr *mr)
{
struct mthca_mr *mmr = to_mmr(mr);
mthca_free_mr(to_mdev(mr->device), mmr);
kfree(mmr);
return 0;
}
static struct ib_fmr *mthca_alloc_fmr(struct ib_pd *pd, int mr_access_flags,
struct ib_fmr_attr *fmr_attr)
{
struct mthca_fmr *fmr;
int err;
fmr = kmalloc(sizeof *fmr, GFP_KERNEL);
if (!fmr)
return ERR_PTR(-ENOMEM);
memcpy(&fmr->attr, fmr_attr, sizeof *fmr_attr);
err = mthca_fmr_alloc(to_mdev(pd->device), to_mpd(pd)->pd_num,
convert_access(mr_access_flags), fmr);
if (err) {
kfree(fmr);
return ERR_PTR(err);
}
return &fmr->ibmr;
}
static int mthca_dealloc_fmr(struct ib_fmr *fmr)
{
struct mthca_fmr *mfmr = to_mfmr(fmr);
int err;
err = mthca_free_fmr(to_mdev(fmr->device), mfmr);
if (err)
return err;
kfree(mfmr);
return 0;
}
static int mthca_unmap_fmr(struct list_head *fmr_list)
{
struct ib_fmr *fmr;
int err;
u8 status;
struct mthca_dev *mdev = NULL;
list_for_each_entry(fmr, fmr_list, list) {
if (mdev && to_mdev(fmr->device) != mdev)
return -EINVAL;
mdev = to_mdev(fmr->device);
}
if (!mdev)
return 0;
if (mthca_is_memfree(mdev)) {
list_for_each_entry(fmr, fmr_list, list)
mthca_arbel_fmr_unmap(mdev, to_mfmr(fmr));
wmb();
} else
list_for_each_entry(fmr, fmr_list, list)
mthca_tavor_fmr_unmap(mdev, to_mfmr(fmr));
err = mthca_SYNC_TPT(mdev, &status);
if (err)
return err;
if (status)
return -EINVAL;
return 0;
}
static ssize_t show_rev(struct class_device *cdev, char *buf)
{
struct mthca_dev *dev = container_of(cdev, struct mthca_dev, ib_dev.class_dev);
return sprintf(buf, "%x\n", dev->rev_id);
}
static ssize_t show_fw_ver(struct class_device *cdev, char *buf)
{
struct mthca_dev *dev = container_of(cdev, struct mthca_dev, ib_dev.class_dev);
return sprintf(buf, "%d.%d.%d\n", (int) (dev->fw_ver >> 32),
(int) (dev->fw_ver >> 16) & 0xffff,
(int) dev->fw_ver & 0xffff);
}
static ssize_t show_hca(struct class_device *cdev, char *buf)
{
struct mthca_dev *dev = container_of(cdev, struct mthca_dev, ib_dev.class_dev);
switch (dev->pdev->device) {
case PCI_DEVICE_ID_MELLANOX_TAVOR:
return sprintf(buf, "MT23108\n");
case PCI_DEVICE_ID_MELLANOX_ARBEL_COMPAT:
return sprintf(buf, "MT25208 (MT23108 compat mode)\n");
case PCI_DEVICE_ID_MELLANOX_ARBEL:
return sprintf(buf, "MT25208\n");
case PCI_DEVICE_ID_MELLANOX_SINAI:
case PCI_DEVICE_ID_MELLANOX_SINAI_OLD:
return sprintf(buf, "MT25204\n");
default:
return sprintf(buf, "unknown\n");
}
}
static ssize_t show_board(struct class_device *cdev, char *buf)
{
struct mthca_dev *dev = container_of(cdev, struct mthca_dev, ib_dev.class_dev);
return sprintf(buf, "%.*s\n", MTHCA_BOARD_ID_LEN, dev->board_id);
}
static CLASS_DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL);
static CLASS_DEVICE_ATTR(fw_ver, S_IRUGO, show_fw_ver, NULL);
static CLASS_DEVICE_ATTR(hca_type, S_IRUGO, show_hca, NULL);
static CLASS_DEVICE_ATTR(board_id, S_IRUGO, show_board, NULL);
static struct class_device_attribute *mthca_class_attributes[] = {
&class_device_attr_hw_rev,
&class_device_attr_fw_ver,
&class_device_attr_hca_type,
&class_device_attr_board_id
};
static int mthca_init_node_data(struct mthca_dev *dev)
{
struct ib_smp *in_mad = NULL;
struct ib_smp *out_mad = NULL;
int err = -ENOMEM;
u8 status;
in_mad = kzalloc(sizeof *in_mad, GFP_KERNEL);
out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
if (!in_mad || !out_mad)
goto out;
init_query_mad(in_mad);
in_mad->attr_id = IB_SMP_ATTR_NODE_DESC;
err = mthca_MAD_IFC(dev, 1, 1,
1, NULL, NULL, in_mad, out_mad,
&status);
if (err)
goto out;
if (status) {
err = -EINVAL;
goto out;
}
memcpy(dev->ib_dev.node_desc, out_mad->data, 64);
in_mad->attr_id = IB_SMP_ATTR_NODE_INFO;
err = mthca_MAD_IFC(dev, 1, 1,
1, NULL, NULL, in_mad, out_mad,
&status);
if (err)
goto out;
if (status) {
err = -EINVAL;
goto out;
}
memcpy(&dev->ib_dev.node_guid, out_mad->data + 12, 8);
out:
kfree(in_mad);
kfree(out_mad);
return err;
}
int mthca_register_device(struct mthca_dev *dev)
{
int ret;
int i;
ret = mthca_init_node_data(dev);
if (ret)
return ret;
strlcpy(dev->ib_dev.name, "mthca%d", IB_DEVICE_NAME_MAX);
dev->ib_dev.owner = THIS_MODULE;
dev->ib_dev.uverbs_abi_ver = MTHCA_UVERBS_ABI_VERSION;
dev->ib_dev.uverbs_cmd_mask =
(1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
(1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
(1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
(1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
(1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
(1ull << IB_USER_VERBS_CMD_REG_MR) |
(1ull << IB_USER_VERBS_CMD_DEREG_MR) |
(1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
(1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
(1ull << IB_USER_VERBS_CMD_RESIZE_CQ) |
(1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
(1ull << IB_USER_VERBS_CMD_CREATE_QP) |
(1ull << IB_USER_VERBS_CMD_QUERY_QP) |
(1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
(1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
(1ull << IB_USER_VERBS_CMD_ATTACH_MCAST) |
(1ull << IB_USER_VERBS_CMD_DETACH_MCAST) |
(1ull << IB_USER_VERBS_CMD_CREATE_SRQ) |
(1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) |
(1ull << IB_USER_VERBS_CMD_QUERY_SRQ) |
(1ull << IB_USER_VERBS_CMD_DESTROY_SRQ);
dev->ib_dev.node_type = IB_NODE_CA;
dev->ib_dev.phys_port_cnt = dev->limits.num_ports;
dev->ib_dev.dma_device = &dev->pdev->dev;
dev->ib_dev.class_dev.dev = &dev->pdev->dev;
dev->ib_dev.query_device = mthca_query_device;
dev->ib_dev.query_port = mthca_query_port;
dev->ib_dev.modify_device = mthca_modify_device;
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.mmap = mthca_mmap_uar;
dev->ib_dev.alloc_pd = mthca_alloc_pd;
dev->ib_dev.dealloc_pd = mthca_dealloc_pd;
dev->ib_dev.create_ah = mthca_ah_create;
dev->ib_dev.query_ah = mthca_ah_query;
dev->ib_dev.destroy_ah = mthca_ah_destroy;
if (dev->mthca_flags & MTHCA_FLAG_SRQ) {
dev->ib_dev.create_srq = mthca_create_srq;
dev->ib_dev.modify_srq = mthca_modify_srq;
dev->ib_dev.query_srq = mthca_query_srq;
dev->ib_dev.destroy_srq = mthca_destroy_srq;
if (mthca_is_memfree(dev))
dev->ib_dev.post_srq_recv = mthca_arbel_post_srq_recv;
else
dev->ib_dev.post_srq_recv = mthca_tavor_post_srq_recv;
}
dev->ib_dev.create_qp = mthca_create_qp;
dev->ib_dev.modify_qp = mthca_modify_qp;
dev->ib_dev.query_qp = mthca_query_qp;
dev->ib_dev.destroy_qp = mthca_destroy_qp;
dev->ib_dev.create_cq = mthca_create_cq;
dev->ib_dev.resize_cq = mthca_resize_cq;
dev->ib_dev.destroy_cq = mthca_destroy_cq;
dev->ib_dev.poll_cq = mthca_poll_cq;
dev->ib_dev.get_dma_mr = mthca_get_dma_mr;
dev->ib_dev.reg_phys_mr = mthca_reg_phys_mr;
dev->ib_dev.reg_user_mr = mthca_reg_user_mr;
dev->ib_dev.dereg_mr = mthca_dereg_mr;
if (dev->mthca_flags & MTHCA_FLAG_FMR) {
dev->ib_dev.alloc_fmr = mthca_alloc_fmr;
dev->ib_dev.unmap_fmr = mthca_unmap_fmr;
dev->ib_dev.dealloc_fmr = mthca_dealloc_fmr;
if (mthca_is_memfree(dev))
dev->ib_dev.map_phys_fmr = mthca_arbel_map_phys_fmr;
else
dev->ib_dev.map_phys_fmr = mthca_tavor_map_phys_fmr;
}
dev->ib_dev.attach_mcast = mthca_multicast_attach;
dev->ib_dev.detach_mcast = mthca_multicast_detach;
dev->ib_dev.process_mad = mthca_process_mad;
if (mthca_is_memfree(dev)) {
dev->ib_dev.req_notify_cq = mthca_arbel_arm_cq;
dev->ib_dev.post_send = mthca_arbel_post_send;
dev->ib_dev.post_recv = mthca_arbel_post_receive;
} else {
dev->ib_dev.req_notify_cq = mthca_tavor_arm_cq;
dev->ib_dev.post_send = mthca_tavor_post_send;
dev->ib_dev.post_recv = mthca_tavor_post_receive;
}
mutex_init(&dev->cap_mask_mutex);
ret = ib_register_device(&dev->ib_dev);
if (ret)
return ret;
for (i = 0; i < ARRAY_SIZE(mthca_class_attributes); ++i) {
ret = class_device_create_file(&dev->ib_dev.class_dev,
mthca_class_attributes[i]);
if (ret) {
ib_unregister_device(&dev->ib_dev);
return ret;
}
}
mthca_start_catas_poll(dev);
return 0;
}
void mthca_unregister_device(struct mthca_dev *dev)
{
mthca_stop_catas_poll(dev);
ib_unregister_device(&dev->ib_dev);
}
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