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linux_dsm_epyc7002/drivers/infiniband/hw/mthca/mthca_provider.c
Roland Dreier f7c6a7b5d5 IB/uverbs: Export ib_umem_get()/ib_umem_release() to modules 
Export ib_umem_get()/ib_umem_release() and put low-level drivers in
control of when to call ib_umem_get() to pin and DMA map userspace,
rather than always calling it in ib_uverbs_reg_mr() before calling the
low-level driver's reg_user_mr method.

Also move these functions to be in the ib_core module instead of
ib_uverbs, so that driver modules using them do not depend on
ib_uverbs.

This has a number of advantages:
 - It is better design from the standpoint of making generic code a
   library that can be used or overridden by device-specific code as
   the details of specific devices dictate.
 - Drivers that do not need to pin userspace memory regions do not
   need to take the performance hit of calling ib_mem_get().  For
   example, although I have not tried to implement it in this patch,
   the ipath driver should be able to avoid pinning memory and just
   use copy_{to,from}_user() to access userspace memory regions.
 - Buffers that need special mapping treatment can be identified by
   the low-level driver.  For example, it may be possible to solve
   some Altix-specific memory ordering issues with mthca CQs in
   userspace by mapping CQ buffers with extra flags.
 - Drivers that need to pin and DMA map userspace memory for things
   other than memory regions can use ib_umem_get() directly, instead
   of hacks using extra parameters to their reg_phys_mr method.  For
   example, the mlx4 driver that is pending being merged needs to pin
   and DMA map QP and CQ buffers, but it does not need to create a
   memory key for these buffers.  So the cleanest solution is for mlx4
   to call ib_umem_get() in the create_qp and create_cq methods.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-05-08 18:00:37 -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_umem.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;
/*
* If Sinai memory key optimization is being used, then only
* the 8-bit key portion will change. For other HCAs, the
* unused index bits will also be used for FMR remapping.
*/
if (mdev->mthca_flags & MTHCA_FLAG_SINAI_OPT)
props->max_map_per_fmr = 255;
else
props->max_map_per_fmr =
(1 << (32 - ilog2(mdev->limits.num_mpts))) - 1;
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;
props->max_vl_num = out_mad->data[37] >> 4;
props->init_type_reply = out_mad->data[41] >> 4;
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) * 8, 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,
int comp_vector,
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;
mutex_lock(&cq->mutex);
entries = roundup_pow_of_two(entries + 1);
if (entries == ibcq->cqe + 1) {
ret = 0;
goto out;
}
if (cq->is_kernel) {
ret = mthca_alloc_resize_buf(dev, cq, entries);
if (ret)
goto out;
lkey = cq->resize_buf->buf.mr.ibmr.lkey;
} else {
if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd)) {
ret = -EFAULT;
goto out;
}
lkey = ucmd.lkey;
}
ret = mthca_RESIZE_CQ(dev, cq->cqn, lkey, ilog2(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);
}
goto out;
}
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;
out:
mutex_unlock(&cq->mutex);
return ret;
}
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);
}
mr->umem = NULL;
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);
mr->umem = NULL;
return &mr->ibmr;
}
static struct ib_mr *mthca_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
u64 virt, 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;
int write_mtt_size;
mr = kmalloc(sizeof *mr, GFP_KERNEL);
if (!mr)
return ERR_PTR(-ENOMEM);
mr->umem = ib_umem_get(pd->uobject->context, start, length, acc);
if (IS_ERR(mr->umem)) {
err = PTR_ERR(mr->umem);
goto err;
}
shift = ffs(mr->umem->page_size) - 1;
n = 0;
list_for_each_entry(chunk, &mr->umem->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_umem;
}
pages = (u64 *) __get_free_page(GFP_KERNEL);
if (!pages) {
err = -ENOMEM;
goto err_mtt;
}
i = n = 0;
write_mtt_size = min(mthca_write_mtt_size(dev), (int) (PAGE_SIZE / sizeof *pages));
list_for_each_entry(chunk, &mr->umem->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]) +
mr->umem->page_size * k;
/*
* Be friendly to write_mtt and pass it chunks
* of appropriate size.
*/
if (i == write_mtt_size) {
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, virt, length,
convert_access(acc), mr);
if (err)
goto err_mtt;
return &mr->ibmr;
err_mtt:
mthca_free_mtt(dev, mr->mtt);
err_umem:
ib_umem_release(mr->umem);
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);
if (mmr->umem)
ib_umem_release(mmr->umem);
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);
dev->ib_dev.node_type = RDMA_NODE_IB_CA;
dev->ib_dev.phys_port_cnt = dev->limits.num_ports;
dev->ib_dev.num_comp_vectors = 1;
dev->ib_dev.dma_device = &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;
dev->ib_dev.uverbs_cmd_mask |=
(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);
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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