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freebsd-src/sys/dev/mthca/mthca_provider.c
Hans Petter Selasky b633e08c70 ibcore: Kernel space update based on Linux 5.7-rc1. 
Overview:

This is the first stage of a RDMA stack upgrade introducing kernel
changes only based on Linux 5.7-rc1.

This patch is based on about four main areas of work:
- Update of the IB uobjects system:
  - The memory holding so-called AH, CQ, PD, SRQ and UCONTEXT objects
    is now managed by ibcore. This also require some changes in the
    kernel verbs API. The updated verbs changes are typically about
    initialize and deinitialize objects, and remove allocation and
    free of memory.

- Update of the uverbs IOCTL framework:
  - The parsing and handling of user-space commands has been
    completely refactored to integrate with the updated IB uobjects
    system.

- Various changes and updates to the generic uverbs interfaces in
  device drivers including the new uAPI surface.

- The mlx5_ib_devx.c in mlx5ib and related mlx5 core changes.

Dependencies:

- The mlx4ib driver code has been updated with the minimum changes
needed.

- The mlx5ib driver code has been updated with the minimum changes
needed including DV support.

Compatibility:

- All user-space facing APIs are backwards compatible after this
  change.

- All kernel-space facing RDMA APIs are backwards compatible after
  this change, with exception of ib_create_ah() and ib_destroy_ah()
  which takes a new flag.

- The "ib_device_ops" structure exist, but only contains the driver ID
  and some structure sizes.

Differences from Linux:

- Infiniband drivers must use the INIT_IB_DEVICE_OPS() macro to set
  the sizes needed for allocating various IB objects, when adding
  IB device instances.

Security:

- PRIV_NET_RAW is needed to use raw ethernet transmit features.
- PRIV_DRIVER is needed to use other privileged operations.

Based on upstream Linux, Torvalds (5.7-rc1):
8632e9b5645bbc2331d21d892b0d6961c1a08429

MFC after:	1 week
Reviewed by:	kib
Differential Revision:	https://reviews.freebsd.org/D31149
Sponsored by:	NVIDIA Networking
2021-07-28 13:28:29 +02:00

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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.
*/
#include <rdma/ib_smi.h>
#include <rdma/ib_umem.h>
#include <rdma/ib_user_verbs.h>
#include <rdma/uverbs_ioctl.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/mm.h>
#include <linux/fs.h>
#include "mthca_dev.h"
#include "mthca_cmd.h"
#include <rdma/mthca-abi.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_udata *uhw)
{
struct ib_smp *in_mad = NULL;
struct ib_smp *out_mad = NULL;
int err = -ENOMEM;
struct mthca_dev *mdev = to_mdev(ibdev);
if (uhw->inlen || uhw->outlen)
return -EINVAL;
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);
if (err)
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_sge_rd = props->max_sge;
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;
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);
if (err)
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,
IB_DEVICE_NODE_DESC_MAX);
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;
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);
if (err)
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;
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);
if (err)
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;
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);
if (err)
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);
if (err)
goto out;
memcpy(gid->raw + 8, out_mad->data + (index % 8) * 8, 8);
out:
kfree(in_mad);
kfree(out_mad);
return err;
}
static int mthca_alloc_ucontext(struct ib_ucontext *uctx,
struct ib_udata *udata)
{
struct ib_device *ibdev = uctx->device;
struct mthca_alloc_ucontext_resp uresp = {};
struct mthca_ucontext *context = to_mucontext(uctx);
int err;
if (!(to_mdev(ibdev)->active))
return -EAGAIN;
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;
err = mthca_uar_alloc(to_mdev(ibdev), &context->uar);
if (err)
return 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);
return 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);
return -EFAULT;
}
context->reg_mr_warned = 0;
return 0;
}
static void 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);
}
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 int mthca_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
{
struct ib_device *ibdev = ibpd->device;
struct mthca_pd *pd = to_mpd(ibpd);
int err;
err = mthca_pd_alloc(to_mdev(ibdev), !udata, pd);
if (err)
return err;
if (udata) {
if (ib_copy_to_udata(udata, &pd->pd_num, sizeof (__u32))) {
mthca_pd_free(to_mdev(ibdev), pd);
return -EFAULT;
}
}
return 0;
}
static void mthca_dealloc_pd(struct ib_pd *pd, struct ib_udata *udata)
{
mthca_pd_free(to_mdev(pd->device), to_mpd(pd));
}
static int mthca_ah_create(struct ib_ah *ibah,
struct ib_ah_attr *init_attr, u32 flags,
struct ib_udata *udata)
{
struct mthca_ah *ah = to_mah(ibah);
return mthca_create_ah(to_mdev(ibah->device), to_mpd(ibah->pd),
init_attr, ah);
}
static void mthca_ah_destroy(struct ib_ah *ah, u32 flags)
{
mthca_destroy_ah(to_mdev(ah->device), to_mah(ah));
}
static int mthca_create_srq(struct ib_srq *ibsrq,
struct ib_srq_init_attr *init_attr,
struct ib_udata *udata)
{
struct mthca_create_srq ucmd;
struct mthca_ucontext *context = rdma_udata_to_drv_context(
udata, struct mthca_ucontext, ibucontext);
struct mthca_srq *srq = to_msrq(ibsrq);
int err;
if (init_attr->srq_type != IB_SRQT_BASIC)
return -EOPNOTSUPP;
if (udata) {
if (ib_copy_from_udata(&ucmd, udata, sizeof(ucmd)))
return -EFAULT;
err = mthca_map_user_db(to_mdev(ibsrq->device), &context->uar,
context->db_tab, ucmd.db_index,
ucmd.db_page);
if (err)
return err;
srq->mr.ibmr.lkey = ucmd.lkey;
srq->db_index = ucmd.db_index;
}
err = mthca_alloc_srq(to_mdev(ibsrq->device), to_mpd(ibsrq->pd),
&init_attr->attr, srq, udata);
if (err && udata)
mthca_unmap_user_db(to_mdev(ibsrq->device), &context->uar,
context->db_tab, ucmd.db_index);
if (err)
return err;
if (context && ib_copy_to_udata(udata, &srq->srqn, sizeof(__u32))) {
mthca_free_srq(to_mdev(ibsrq->device), srq);
return -EFAULT;
}
return 0;
}
static void mthca_destroy_srq(struct ib_srq *srq, struct ib_udata *udata)
{
if (udata) {
struct mthca_ucontext *context =
rdma_udata_to_drv_context(
udata,
struct mthca_ucontext,
ibucontext);
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));
}
static struct ib_qp *mthca_create_qp(struct ib_pd *pd,
struct ib_qp_init_attr *init_attr,
struct ib_udata *udata)
{
struct mthca_ucontext *context = rdma_udata_to_drv_context(
udata, struct mthca_ucontext, ibucontext);
struct mthca_create_qp ucmd;
struct mthca_qp *qp;
int err;
if (init_attr->create_flags)
return ERR_PTR(-EINVAL);
switch (init_attr->qp_type) {
case IB_QPT_RC:
case IB_QPT_UC:
case IB_QPT_UD:
{
qp = kzalloc(sizeof(*qp), GFP_KERNEL);
if (!qp)
return ERR_PTR(-ENOMEM);
if (udata) {
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, udata);
if (err && udata) {
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:
{
qp = kzalloc(sizeof(*qp), 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), udata);
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, struct ib_udata *udata)
{
if (udata) {
struct mthca_ucontext *context =
rdma_udata_to_drv_context(
udata,
struct mthca_ucontext,
ibucontext);
mthca_unmap_user_db(to_mdev(qp->device),
&context->uar,
context->db_tab,
to_mqp(qp)->sq.db_index);
mthca_unmap_user_db(to_mdev(qp->device),
&context->uar,
context->db_tab,
to_mqp(qp)->rq.db_index);
}
mthca_free_qp(to_mdev(qp->device), to_mqp(qp));
kfree(to_mqp(qp));
return 0;
}
static int mthca_create_cq(struct ib_cq *ibcq,
const struct ib_cq_init_attr *attr,
struct ib_udata *udata)
{
struct ib_device *ibdev = ibcq->device;
int entries = attr->cqe;
struct mthca_create_cq ucmd;
struct mthca_cq *cq;
int nent;
int err;
struct mthca_ucontext *context = rdma_udata_to_drv_context(
udata, struct mthca_ucontext, ibucontext);
if (attr->flags)
return -EOPNOTSUPP;
if (entries < 1 || entries > to_mdev(ibdev)->limits.max_cqes)
return -EINVAL;
if (udata) {
if (ib_copy_from_udata(&ucmd, udata, sizeof(ucmd)))
return -EFAULT;
err = mthca_map_user_db(to_mdev(ibdev), &context->uar,
context->db_tab, ucmd.set_db_index,
ucmd.set_db_page);
if (err)
return err;
err = mthca_map_user_db(to_mdev(ibdev), &context->uar,
context->db_tab, ucmd.arm_db_index,
ucmd.arm_db_page);
if (err)
goto err_unmap_set;
}
cq = to_mcq(ibcq);
if (udata) {
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,
udata ? ucmd.pdn : to_mdev(ibdev)->driver_pd.pd_num,
cq);
if (err)
goto err_unmap_arm;
if (udata && ib_copy_to_udata(udata, &cq->cqn, sizeof(__u32))) {
mthca_free_cq(to_mdev(ibdev), cq);
err = -EFAULT;
goto err_unmap_arm;
}
cq->resize_buf = NULL;
return 0;
err_unmap_arm:
if (udata)
mthca_unmap_user_db(to_mdev(ibdev), &context->uar,
context->db_tab, ucmd.arm_db_index);
err_unmap_set:
if (udata)
mthca_unmap_user_db(to_mdev(ibdev), &context->uar,
context->db_tab, ucmd.set_db_index);
return 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;
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));
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 void mthca_destroy_cq(struct ib_cq *cq, struct ib_udata *udata)
{
if (udata) {
struct mthca_ucontext *context =
rdma_udata_to_drv_context(
udata,
struct mthca_ucontext,
ibucontext);
mthca_unmap_user_db(to_mdev(cq->device),
&context->uar,
context->db_tab,
to_mcq(cq)->arm_db_index);
mthca_unmap_user_db(to_mdev(cq->device),
&context->uar,
context->db_tab,
to_mcq(cq)->set_ci_db_index);
}
mthca_free_cq(to_mdev(cq->device), to_mcq(cq));
}
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_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 scatterlist *sg;
struct mthca_mr *mr;
struct mthca_reg_mr ucmd;
u64 *pages;
int shift, n, len;
int i, k, entry;
int err = 0;
int write_mtt_size;
if (udata->inlen - sizeof (struct ib_uverbs_cmd_hdr) < sizeof ucmd) {
if (!to_mucontext(pd->uobject->context)->reg_mr_warned) {
mthca_warn(dev, "Process '%s' did not pass in MR attrs.\n",
current->comm);
mthca_warn(dev, " Update libmthca to fix this.\n");
}
++to_mucontext(pd->uobject->context)->reg_mr_warned;
ucmd.mr_attrs = 0;
} else if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd))
return ERR_PTR(-EFAULT);
mr = kmalloc(sizeof *mr, GFP_KERNEL);
if (!mr)
return ERR_PTR(-ENOMEM);
mr->umem = ib_umem_get(pd->uobject->context, start, length, acc,
ucmd.mr_attrs & MTHCA_MR_DMASYNC);
if (IS_ERR(mr->umem)) {
err = PTR_ERR(mr->umem);
goto err;
}
shift = ffs(mr->umem->page_size) - 1;
n = mr->umem->nmap;
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));
for_each_sg(mr->umem->sg_head.sgl, sg, mr->umem->nmap, entry) {
len = sg_dma_len(sg) >> shift;
for (k = 0; k < len; ++k) {
pages[i++] = sg_dma_address(sg) +
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 ib_udata *udata)
{
struct mthca_mr *mmr = to_mmr(mr);
mthca_free_mr(to_mdev(mr->device), mmr);
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;
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);
return err;
}
static ssize_t show_rev(struct device *device, struct device_attribute *attr,
char *buf)
{
struct mthca_dev *dev =
container_of(device, struct mthca_dev, ib_dev.dev);
return sprintf(buf, "%x\n", dev->rev_id);
}
static ssize_t show_hca(struct device *device, struct device_attribute *attr,
char *buf)
{
struct mthca_dev *dev =
container_of(device, struct mthca_dev, ib_dev.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 device *device, struct device_attribute *attr,
char *buf)
{
struct mthca_dev *dev =
container_of(device, struct mthca_dev, ib_dev.dev);
return sprintf(buf, "%.*s\n", MTHCA_BOARD_ID_LEN, dev->board_id);
}
static DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL);
static DEVICE_ATTR(hca_type, S_IRUGO, show_hca, NULL);
static DEVICE_ATTR(board_id, S_IRUGO, show_board, NULL);
static struct device_attribute *mthca_dev_attributes[] = {
&dev_attr_hw_rev,
&dev_attr_hca_type,
&dev_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;
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);
if (err)
goto out;
memcpy(dev->ib_dev.node_desc, out_mad->data, IB_DEVICE_NODE_DESC_MAX);
in_mad->attr_id = IB_SMP_ATTR_NODE_INFO;
err = mthca_MAD_IFC(dev, 1, 1,
1, NULL, NULL, in_mad, out_mad);
if (err)
goto out;
if (mthca_is_memfree(dev))
dev->rev_id = be32_to_cpup((__be32 *) (out_mad->data + 32));
memcpy(&dev->ib_dev.node_guid, out_mad->data + 12, 8);
out:
kfree(in_mad);
kfree(out_mad);
return err;
}
static int mthca_port_immutable(struct ib_device *ibdev, u8 port_num,
struct ib_port_immutable *immutable)
{
struct ib_port_attr attr;
int err;
err = mthca_query_port(ibdev, port_num, &attr);
if (err)
return err;
immutable->pkey_tbl_len = attr.pkey_tbl_len;
immutable->gid_tbl_len = attr.gid_tbl_len;
immutable->core_cap_flags = RDMA_CORE_PORT_IBA_IB;
immutable->max_mad_size = IB_MGMT_MAD_SIZE;
return 0;
}
static void get_dev_fw_str(struct ib_device *device, char *str,
size_t str_len)
{
struct mthca_dev *dev =
container_of(device, struct mthca_dev, ib_dev);
snprintf(str, str_len, "%d.%d.%d",
(int) (dev->fw_ver >> 32),
(int) (dev->fw_ver >> 16) & 0xffff,
(int) dev->fw_ver & 0xffff);
}
int mthca_register_device(struct mthca_dev *dev)
{
int ret;
int i;
ret = mthca_init_node_data(dev);
if (ret)
return ret;
#define mthca_ib_ah mthca_ah
#define mthca_ib_cq mthca_cq
#define mthca_ib_pd mthca_pd
#define mthca_ib_qp mthca_qp
#define mthca_ib_srq mthca_srq
#define mthca_ib_ucontext mthca_ucontext
INIT_IB_DEVICE_OPS(&dev->ib_dev.ops, mthca, MTHCA);
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_user_mr = mthca_reg_user_mr;
dev->ib_dev.dereg_mr = mthca_dereg_mr;
dev->ib_dev.get_port_immutable = mthca_port_immutable;
dev->ib_dev.get_dev_fw_str = get_dev_fw_str;
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, NULL);
if (ret)
return ret;
for (i = 0; i < ARRAY_SIZE(mthca_dev_attributes); ++i) {
ret = device_create_file(&dev->ib_dev.dev,
mthca_dev_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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