mthca_provider.c 34.3 KB
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/*
 * Copyright (c) 2004, 2005 Topspin Communications.  All rights reserved.
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 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
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 * Copyright (c) 2005, 2006 Cisco Systems.  All rights reserved.
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 * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
 * Copyright (c) 2004 Voltaire, Inc. All rights reserved.
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 *
 * 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.
 *
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 * $Id: mthca_provider.c 4859 2006-01-09 21:55:10Z roland $
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 */

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#include <rdma/ib_smi.h>
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#include <rdma/ib_user_verbs.h>
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#include <linux/mm.h>
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#include "mthca_dev.h"
#include "mthca_cmd.h"
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#include "mthca_user.h"
#include "mthca_memfree.h"
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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;
}

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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;

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	in_mad  = kzalloc(sizeof *in_mad, GFP_KERNEL);
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	out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
	if (!in_mad || !out_mad)
		goto out;

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	memset(props, 0, sizeof *props);
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	props->fw_ver              = mdev->fw_ver;

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	init_query_mad(in_mad);
	in_mad->attr_id = IB_SMP_ATTR_NODE_INFO;
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	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;
	}

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	props->device_cap_flags    = mdev->device_cap_flags;
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	props->vendor_id           = be32_to_cpup((__be32 *) (out_mad->data + 36)) &
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		0xffffff;
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	props->vendor_part_id      = be16_to_cpup((__be16 *) (out_mad->data + 30));
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	props->hw_ver              = be32_to_cpup((__be32 *) (out_mad->data + 32));
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	memcpy(&props->sys_image_guid, out_mad->data +  4, 8);

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	props->max_mr_size         = ~0ull;
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	props->page_size_cap       = mdev->limits.page_size_cap;
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	props->max_qp              = mdev->limits.num_qps - mdev->limits.reserved_qps;
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	props->max_qp_wr           = mdev->limits.max_wqes;
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	props->max_sge             = mdev->limits.max_sg;
	props->max_cq              = mdev->limits.num_cqs - mdev->limits.reserved_cqs;
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	props->max_cqe             = mdev->limits.max_cqes;
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	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;
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	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_sg;
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	props->local_ca_ack_delay  = mdev->limits.local_ca_ack_delay;
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	props->atomic_cap          = mdev->limits.flags & DEV_LIM_FLAG_ATOMIC ?
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					IB_ATOMIC_HCA : IB_ATOMIC_NONE;
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	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;
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	props->max_total_mcast_qp_attach = props->max_mcast_qp_attach *
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					   props->max_mcast_grp;
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	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;

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	in_mad  = kzalloc(sizeof *in_mad, GFP_KERNEL);
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	out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
	if (!in_mad || !out_mad)
		goto out;

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	memset(props, 0, sizeof *props);

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	init_query_mad(in_mad);
	in_mad->attr_id  = IB_SMP_ATTR_PORT_INFO;
	in_mad->attr_mod = cpu_to_be32(port);
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	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;
	}

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	props->lid               = be16_to_cpup((__be16 *) (out_mad->data + 16));
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	props->lmc               = out_mad->data[34] & 0x7;
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	props->sm_lid            = be16_to_cpup((__be16 *) (out_mad->data + 18));
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	props->sm_sl             = out_mad->data[36] & 0xf;
	props->state             = out_mad->data[32] & 0xf;
	props->phys_state        = out_mad->data[33] >> 4;
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	props->port_cap_flags    = be32_to_cpup((__be32 *) (out_mad->data + 20));
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	props->gid_tbl_len       = to_mdev(ibdev)->limits.gid_table_len;
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	props->max_msg_sz        = 0x80000000;
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	props->pkey_tbl_len      = to_mdev(ibdev)->limits.pkey_table_len;
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	props->bad_pkey_cntr     = be16_to_cpup((__be16 *) (out_mad->data + 46));
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	props->qkey_viol_cntr    = be16_to_cpup((__be16 *) (out_mad->data + 48));
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	props->active_width      = out_mad->data[31] & 0xf;
	props->active_speed      = out_mad->data[35] >> 4;
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	props->max_mtu           = out_mad->data[41] & 0xf;
	props->active_mtu        = out_mad->data[36] >> 4;
	props->subnet_timeout    = out_mad->data[51] & 0x1f;
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 out:
	kfree(in_mad);
	kfree(out_mad);
	return err;
}

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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;
}

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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;

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	if (mutex_lock_interruptible(&to_mdev(ibdev)->cap_mask_mutex))
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		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:
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	mutex_unlock(&to_mdev(ibdev)->cap_mask_mutex);
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	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;

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	in_mad  = kzalloc(sizeof *in_mad, GFP_KERNEL);
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	out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
	if (!in_mad || !out_mad)
		goto out;

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	init_query_mad(in_mad);
	in_mad->attr_id  = IB_SMP_ATTR_PKEY_TABLE;
	in_mad->attr_mod = cpu_to_be32(index / 32);
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	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;
	}

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	*pkey = be16_to_cpu(((__be16 *) out_mad->data)[index % 32]);
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 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;

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	in_mad  = kzalloc(sizeof *in_mad, GFP_KERNEL);
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	out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
	if (!in_mad || !out_mad)
		goto out;

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	init_query_mad(in_mad);
	in_mad->attr_id  = IB_SMP_ATTR_PORT_INFO;
	in_mad->attr_mod = cpu_to_be32(port);
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	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);

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	init_query_mad(in_mad);
	in_mad->attr_id  = IB_SMP_ATTR_GUID_INFO;
	in_mad->attr_mod = cpu_to_be32(index / 8);
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	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;
}

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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;
}

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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);

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	if (io_remap_pfn_range(vma, vma->vm_start,
			       to_mucontext(context)->uar.pfn,
			       PAGE_SIZE, vma->vm_page_prot))
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		return -EAGAIN;

	return 0;
}

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static struct ib_pd *mthca_alloc_pd(struct ib_device *ibdev,
				    struct ib_ucontext *context,
				    struct ib_udata *udata)
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{
	struct mthca_pd *pd;
	int err;

	pd = kmalloc(sizeof *pd, GFP_KERNEL);
	if (!pd)
		return ERR_PTR(-ENOMEM);

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	err = mthca_pd_alloc(to_mdev(ibdev), !context, pd);
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	if (err) {
		kfree(pd);
		return ERR_PTR(err);
	}

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	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);
		}
	}

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	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;

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	ah = kmalloc(sizeof *ah, GFP_ATOMIC);
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	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;
}

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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);

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		if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd)) {
			err = -EFAULT;
			goto err_free;
		}
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		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;
}

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static struct ib_qp *mthca_create_qp(struct ib_pd *pd,
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				     struct ib_qp_init_attr *init_attr,
				     struct ib_udata *udata)
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{
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	struct mthca_create_qp ucmd;
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	struct mthca_qp *qp;
	int err;

	switch (init_attr->qp_type) {
	case IB_QPT_RC:
	case IB_QPT_UC:
	case IB_QPT_UD:
	{
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		struct mthca_ucontext *context;

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		qp = kmalloc(sizeof *qp, GFP_KERNEL);
		if (!qp)
			return ERR_PTR(-ENOMEM);

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		if (pd->uobject) {
			context = to_mucontext(pd->uobject->context);

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			if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd)) {
				kfree(qp);
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				return ERR_PTR(-EFAULT);
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			}
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			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;
		}
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		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,
578 579 580 581 582 583 584 585 586 587 588 589 590 591 592
				     &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);
		}

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		qp->ibqp.qp_num = qp->qpn;
		break;
	}
	case IB_QPT_SMI:
	case IB_QPT_GSI:
	{
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		/* Don't allow userspace to create special QPs */
		if (pd->uobject)
			return ERR_PTR(-EINVAL);

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		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),
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				      init_attr->sq_sig_type, &init_attr->cap,
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				      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);
	}

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	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;
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	init_attr->cap.max_inline_data = qp->max_inline_data;
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	return &qp->ibqp;
}

static int mthca_destroy_qp(struct ib_qp *qp)
{
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	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);
	}
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	mthca_free_qp(to_mdev(qp->device), to_mqp(qp));
	kfree(qp);
	return 0;
}

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static struct ib_cq *mthca_create_cq(struct ib_device *ibdev, int entries,
				     struct ib_ucontext *context,
				     struct ib_udata *udata)
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{
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	struct mthca_create_cq ucmd;
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	struct mthca_cq *cq;
	int nent;
	int err;

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	if (entries < 1 || entries > to_mdev(ibdev)->limits.max_cqes)
		return ERR_PTR(-EINVAL);

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	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;
	}

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	cq = kmalloc(sizeof *cq, GFP_KERNEL);
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	if (!cq) {
		err = -ENOMEM;
		goto err_unmap_arm;
	}

	if (context) {
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		cq->buf.mr.ibmr.lkey = ucmd.lkey;
		cq->set_ci_db_index  = ucmd.set_db_index;
		cq->arm_db_index     = ucmd.arm_db_index;
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	}
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	for (nent = 1; nent <= entries; nent <<= 1)
		; /* nothing */

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	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;
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	}

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	cq->resize_buf = NULL;

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	return &cq->ibcq;
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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);
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}

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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;
}

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static int mthca_destroy_cq(struct ib_cq *cq)
{
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	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);
	}
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	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) {
914 915 916 917
		if (i != 0)
			mask |= buffer_list[i].addr;
		if (i != num_phys_buf - 1)
			mask |= buffer_list[i].addr + buffer_list[i].size;
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		total_size += buffer_list[i].size;
	}

922 923 924
	if (mask & ~PAGE_MASK)
		return ERR_PTR(-EINVAL);

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	/* 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) {
978
		kfree(page_list);
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		kfree(mr);
		return ERR_PTR(err);
	}

	kfree(page_list);
	return &mr->ibmr;
}

987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067
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);
}

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static int mthca_dereg_mr(struct ib_mr *mr)
{
1070 1071 1072
	struct mthca_mr *mmr = to_mmr(mr);
	mthca_free_mr(to_mdev(mr->device), mmr);
	kfree(mmr);
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	return 0;
}

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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;

1127
	if (mthca_is_memfree(mdev)) {
1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143
		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;
}

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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);
1153
	return sprintf(buf, "%d.%d.%d\n", (int) (dev->fw_ver >> 32),
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		       (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);
1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172
	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");
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	}
}

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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);
}

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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);
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static CLASS_DEVICE_ATTR(board_id, S_IRUGO, show_board,  NULL);
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static struct class_device_attribute *mthca_class_attributes[] = {
	&class_device_attr_hw_rev,
	&class_device_attr_fw_ver,
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	&class_device_attr_hca_type,
	&class_device_attr_board_id
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};

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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);
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	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);

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	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;
}

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int mthca_register_device(struct mthca_dev *dev)
{
	int ret;
	int i;

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	ret = mthca_init_node_data(dev);
	if (ret)
		return ret;

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	strlcpy(dev->ib_dev.name, "mthca%d", IB_DEVICE_NAME_MAX);
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	dev->ib_dev.owner                = THIS_MODULE;

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	dev->ib_dev.uverbs_abi_ver	 = MTHCA_UVERBS_ABI_VERSION;
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	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)		|
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		(1ull << IB_USER_VERBS_CMD_RESIZE_CQ)		|
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		(1ull << IB_USER_VERBS_CMD_DESTROY_CQ)		|
		(1ull << IB_USER_VERBS_CMD_CREATE_QP)		|
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		(1ull << IB_USER_VERBS_CMD_QUERY_QP)		|
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		(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)		|
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		(1ull << IB_USER_VERBS_CMD_QUERY_SRQ)		|
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		(1ull << IB_USER_VERBS_CMD_DESTROY_SRQ);
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	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;
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	dev->ib_dev.modify_device        = mthca_modify_device;
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	dev->ib_dev.modify_port          = mthca_modify_port;
	dev->ib_dev.query_pkey           = mthca_query_pkey;
	dev->ib_dev.query_gid            = mthca_query_gid;
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	dev->ib_dev.alloc_ucontext       = mthca_alloc_ucontext;
	dev->ib_dev.dealloc_ucontext     = mthca_dealloc_ucontext;
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	dev->ib_dev.mmap                 = mthca_mmap_uar;
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	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.destroy_ah           = mthca_ah_destroy;
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	if (dev->mthca_flags & MTHCA_FLAG_SRQ) {
		dev->ib_dev.create_srq           = mthca_create_srq;
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		dev->ib_dev.modify_srq           = mthca_modify_srq;
		dev->ib_dev.query_srq            = mthca_query_srq;
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		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;
	}

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	dev->ib_dev.create_qp            = mthca_create_qp;
	dev->ib_dev.modify_qp            = mthca_modify_qp;
1308
	dev->ib_dev.query_qp             = mthca_query_qp;
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	dev->ib_dev.destroy_qp           = mthca_destroy_qp;
	dev->ib_dev.create_cq            = mthca_create_cq;
1311
	dev->ib_dev.resize_cq            = mthca_resize_cq;
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	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;
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	dev->ib_dev.reg_user_mr          = mthca_reg_user_mr;
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	dev->ib_dev.dereg_mr             = mthca_dereg_mr;
1318 1319 1320 1321 1322

	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;
1323
		if (mthca_is_memfree(dev))
1324 1325 1326 1327 1328
			dev->ib_dev.map_phys_fmr = mthca_arbel_map_phys_fmr;
		else
			dev->ib_dev.map_phys_fmr = mthca_tavor_map_phys_fmr;
	}

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	dev->ib_dev.attach_mcast         = mthca_multicast_attach;
	dev->ib_dev.detach_mcast         = mthca_multicast_detach;
	dev->ib_dev.process_mad          = mthca_process_mad;

1333
	if (mthca_is_memfree(dev)) {
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		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;
	}

1343
	mutex_init(&dev->cap_mask_mutex);
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	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;
		}
	}

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	mthca_start_catas_poll(dev);

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	return 0;
}

void mthca_unregister_device(struct mthca_dev *dev)
{
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	mthca_stop_catas_poll(dev);
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	ib_unregister_device(&dev->ib_dev);
}