[mirror_ubuntu-kernels.git] / drivers / infiniband / hw / vmw_pvrdma / pvrdma_verbs.c

/*
 * Copyright (c) 2012-2016 VMware, Inc.  All rights reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of EITHER the GNU General Public License
 * version 2 as published by the Free Software Foundation or the BSD
 * 2-Clause License. This program is distributed in the hope that it
 * will be useful, but WITHOUT ANY WARRANTY; WITHOUT EVEN THE IMPLIED
 * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License version 2 for more details at
 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.en.html.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program available in the file COPYING in the main
 * directory of this source tree.
 *
 * The BSD 2-Clause License
 *
 *     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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <asm/page.h>
#include <linux/inet.h>
#include <linux/io.h>
#include <rdma/ib_addr.h>
#include <rdma/ib_smi.h>
#include <rdma/ib_user_verbs.h>
#include <rdma/vmw_pvrdma-abi.h>

#include "pvrdma.h"

/**
 * pvrdma_query_device - query device
 * @ibdev: the device to query
 * @props: the device properties
 * @uhw: user data
 *
 * @return: 0 on success, otherwise negative errno
 */
int pvrdma_query_device(struct ib_device *ibdev,
			struct ib_device_attr *props,
			struct ib_udata *uhw)
{
	struct pvrdma_dev *dev = to_vdev(ibdev);

	if (uhw->inlen || uhw->outlen)
		return -EINVAL;

	memset(props, 0, sizeof(*props));

	props->fw_ver = dev->dsr->caps.fw_ver;
	props->sys_image_guid = dev->dsr->caps.sys_image_guid;
	props->max_mr_size = dev->dsr->caps.max_mr_size;
	props->page_size_cap = dev->dsr->caps.page_size_cap;
	props->vendor_id = dev->dsr->caps.vendor_id;
	props->vendor_part_id = dev->pdev->device;
	props->hw_ver = dev->dsr->caps.hw_ver;
	props->max_qp = dev->dsr->caps.max_qp;
	props->max_qp_wr = dev->dsr->caps.max_qp_wr;
	props->device_cap_flags = dev->dsr->caps.device_cap_flags;
	props->max_send_sge = dev->dsr->caps.max_sge;
	props->max_recv_sge = dev->dsr->caps.max_sge;
	props->max_sge_rd = PVRDMA_GET_CAP(dev, dev->dsr->caps.max_sge,
					   dev->dsr->caps.max_sge_rd);
	props->max_srq = dev->dsr->caps.max_srq;
	props->max_srq_wr = dev->dsr->caps.max_srq_wr;
	props->max_srq_sge = dev->dsr->caps.max_srq_sge;
	props->max_cq = dev->dsr->caps.max_cq;
	props->max_cqe = dev->dsr->caps.max_cqe;
	props->max_mr = dev->dsr->caps.max_mr;
	props->max_pd = dev->dsr->caps.max_pd;
	props->max_qp_rd_atom = dev->dsr->caps.max_qp_rd_atom;
	props->max_qp_init_rd_atom = dev->dsr->caps.max_qp_init_rd_atom;
	props->atomic_cap =
		dev->dsr->caps.atomic_ops &
		(PVRDMA_ATOMIC_OP_COMP_SWAP | PVRDMA_ATOMIC_OP_FETCH_ADD) ?
		IB_ATOMIC_HCA : IB_ATOMIC_NONE;
	props->masked_atomic_cap = props->atomic_cap;
	props->max_ah = dev->dsr->caps.max_ah;
	props->max_pkeys = dev->dsr->caps.max_pkeys;
	props->local_ca_ack_delay = dev->dsr->caps.local_ca_ack_delay;
	if ((dev->dsr->caps.bmme_flags & PVRDMA_BMME_FLAG_LOCAL_INV) &&
	    (dev->dsr->caps.bmme_flags & PVRDMA_BMME_FLAG_REMOTE_INV) &&
	    (dev->dsr->caps.bmme_flags & PVRDMA_BMME_FLAG_FAST_REG_WR)) {
		props->device_cap_flags |= IB_DEVICE_MEM_MGT_EXTENSIONS;
		props->max_fast_reg_page_list_len = PVRDMA_GET_CAP(dev,
				PVRDMA_MAX_FAST_REG_PAGES,
				dev->dsr->caps.max_fast_reg_page_list_len);
	}

	props->device_cap_flags |= IB_DEVICE_PORT_ACTIVE_EVENT |
				   IB_DEVICE_RC_RNR_NAK_GEN;

	return 0;
}

/**
 * pvrdma_query_port - query device port attributes
 * @ibdev: the device to query
 * @port: the port number
 * @props: the device properties
 *
 * @return: 0 on success, otherwise negative errno
 */
int pvrdma_query_port(struct ib_device *ibdev, u8 port,
		      struct ib_port_attr *props)
{
	struct pvrdma_dev *dev = to_vdev(ibdev);
	union pvrdma_cmd_req req;
	union pvrdma_cmd_resp rsp;
	struct pvrdma_cmd_query_port *cmd = &req.query_port;
	struct pvrdma_cmd_query_port_resp *resp = &rsp.query_port_resp;
	int err;

	memset(cmd, 0, sizeof(*cmd));
	cmd->hdr.cmd = PVRDMA_CMD_QUERY_PORT;
	cmd->port_num = port;

	err = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_QUERY_PORT_RESP);
	if (err < 0) {
		dev_warn(&dev->pdev->dev,
			 "could not query port, error: %d\n", err);
		return err;
	}

	/* props being zeroed by the caller, avoid zeroing it here */

	props->state = pvrdma_port_state_to_ib(resp->attrs.state);
	props->max_mtu = pvrdma_mtu_to_ib(resp->attrs.max_mtu);
	props->active_mtu = pvrdma_mtu_to_ib(resp->attrs.active_mtu);
	props->gid_tbl_len = resp->attrs.gid_tbl_len;
	props->port_cap_flags =
		pvrdma_port_cap_flags_to_ib(resp->attrs.port_cap_flags);
	props->port_cap_flags |= IB_PORT_CM_SUP;
	props->ip_gids = true;
	props->max_msg_sz = resp->attrs.max_msg_sz;
	props->bad_pkey_cntr = resp->attrs.bad_pkey_cntr;
	props->qkey_viol_cntr = resp->attrs.qkey_viol_cntr;
	props->pkey_tbl_len = resp->attrs.pkey_tbl_len;
	props->lid = resp->attrs.lid;
	props->sm_lid = resp->attrs.sm_lid;
	props->lmc = resp->attrs.lmc;
	props->max_vl_num = resp->attrs.max_vl_num;
	props->sm_sl = resp->attrs.sm_sl;
	props->subnet_timeout = resp->attrs.subnet_timeout;
	props->init_type_reply = resp->attrs.init_type_reply;
	props->active_width = pvrdma_port_width_to_ib(resp->attrs.active_width);
	props->active_speed = pvrdma_port_speed_to_ib(resp->attrs.active_speed);
	props->phys_state = resp->attrs.phys_state;

	return 0;
}

/**
 * pvrdma_query_gid - query device gid
 * @ibdev: the device to query
 * @port: the port number
 * @index: the index
 * @gid: the device gid value
 *
 * @return: 0 on success, otherwise negative errno
 */
int pvrdma_query_gid(struct ib_device *ibdev, u8 port, int index,
		     union ib_gid *gid)
{
	struct pvrdma_dev *dev = to_vdev(ibdev);

	if (index >= dev->dsr->caps.gid_tbl_len)
		return -EINVAL;

	memcpy(gid, &dev->sgid_tbl[index], sizeof(union ib_gid));

	return 0;
}

/**
 * pvrdma_query_pkey - query device port's P_Key table
 * @ibdev: the device to query
 * @port: the port number
 * @index: the index
 * @pkey: the device P_Key value
 *
 * @return: 0 on success, otherwise negative errno
 */
int pvrdma_query_pkey(struct ib_device *ibdev, u8 port, u16 index,
		      u16 *pkey)
{
	int err = 0;
	union pvrdma_cmd_req req;
	union pvrdma_cmd_resp rsp;
	struct pvrdma_cmd_query_pkey *cmd = &req.query_pkey;

	memset(cmd, 0, sizeof(*cmd));
	cmd->hdr.cmd = PVRDMA_CMD_QUERY_PKEY;
	cmd->port_num = port;
	cmd->index = index;

	err = pvrdma_cmd_post(to_vdev(ibdev), &req, &rsp,
			      PVRDMA_CMD_QUERY_PKEY_RESP);
	if (err < 0) {
		dev_warn(&to_vdev(ibdev)->pdev->dev,
			 "could not query pkey, error: %d\n", err);
		return err;
	}

	*pkey = rsp.query_pkey_resp.pkey;

	return 0;
}

enum rdma_link_layer pvrdma_port_link_layer(struct ib_device *ibdev,
					    u8 port)
{
	return IB_LINK_LAYER_ETHERNET;
}

int pvrdma_modify_device(struct ib_device *ibdev, int mask,
			 struct ib_device_modify *props)
{
	unsigned long flags;

	if (mask & ~(IB_DEVICE_MODIFY_SYS_IMAGE_GUID |
		     IB_DEVICE_MODIFY_NODE_DESC)) {
		dev_warn(&to_vdev(ibdev)->pdev->dev,
			 "unsupported device modify mask %#x\n", mask);
		return -EOPNOTSUPP;
	}

	if (mask & IB_DEVICE_MODIFY_NODE_DESC) {
		spin_lock_irqsave(&to_vdev(ibdev)->desc_lock, flags);
		memcpy(ibdev->node_desc, props->node_desc, 64);
		spin_unlock_irqrestore(&to_vdev(ibdev)->desc_lock, flags);
	}

	if (mask & IB_DEVICE_MODIFY_SYS_IMAGE_GUID) {
		mutex_lock(&to_vdev(ibdev)->port_mutex);
		to_vdev(ibdev)->sys_image_guid =
			cpu_to_be64(props->sys_image_guid);
		mutex_unlock(&to_vdev(ibdev)->port_mutex);
	}

	return 0;
}

/**
 * pvrdma_modify_port - modify device port attributes
 * @ibdev: the device to modify
 * @port: the port number
 * @mask: attributes to modify
 * @props: the device properties
 *
 * @return: 0 on success, otherwise negative errno
 */
int pvrdma_modify_port(struct ib_device *ibdev, u8 port, int mask,
		       struct ib_port_modify *props)
{
	struct ib_port_attr attr;
	struct pvrdma_dev *vdev = to_vdev(ibdev);
	int ret;

	if (mask & ~IB_PORT_SHUTDOWN) {
		dev_warn(&vdev->pdev->dev,
			 "unsupported port modify mask %#x\n", mask);
		return -EOPNOTSUPP;
	}

	mutex_lock(&vdev->port_mutex);
	ret = ib_query_port(ibdev, port, &attr);
	if (ret)
		goto out;

	vdev->port_cap_mask |= props->set_port_cap_mask;
	vdev->port_cap_mask &= ~props->clr_port_cap_mask;

	if (mask & IB_PORT_SHUTDOWN)
		vdev->ib_active = false;

out:
	mutex_unlock(&vdev->port_mutex);
	return ret;
}

/**
 * pvrdma_alloc_ucontext - allocate ucontext
 * @uctx: the uverbs countext
 * @udata: user data
 *
 * @return:  zero on success, otherwise errno.
 */
int pvrdma_alloc_ucontext(struct ib_ucontext *uctx, struct ib_udata *udata)
{
	struct ib_device *ibdev = uctx->device;
	struct pvrdma_dev *vdev = to_vdev(ibdev);
	struct pvrdma_ucontext *context = to_vucontext(uctx);
	union pvrdma_cmd_req req = {};
	union pvrdma_cmd_resp rsp = {};
	struct pvrdma_cmd_create_uc *cmd = &req.create_uc;
	struct pvrdma_cmd_create_uc_resp *resp = &rsp.create_uc_resp;
	struct pvrdma_alloc_ucontext_resp uresp = {};
	int ret;

	if (!vdev->ib_active)
		return -EAGAIN;

	context->dev = vdev;
	ret = pvrdma_uar_alloc(vdev, &context->uar);
	if (ret)
		return -ENOMEM;

	/* get ctx_handle from host */
	if (vdev->dsr_version < PVRDMA_PPN64_VERSION)
		cmd->pfn = context->uar.pfn;
	else
		cmd->pfn64 = context->uar.pfn;

	cmd->hdr.cmd = PVRDMA_CMD_CREATE_UC;
	ret = pvrdma_cmd_post(vdev, &req, &rsp, PVRDMA_CMD_CREATE_UC_RESP);
	if (ret < 0) {
		dev_warn(&vdev->pdev->dev,
			 "could not create ucontext, error: %d\n", ret);
		goto err;
	}

	context->ctx_handle = resp->ctx_handle;

	/* copy back to user */
	uresp.qp_tab_size = vdev->dsr->caps.max_qp;
	ret = ib_copy_to_udata(udata, &uresp, sizeof(uresp));
	if (ret) {
		pvrdma_uar_free(vdev, &context->uar);
		pvrdma_dealloc_ucontext(&context->ibucontext);
		return -EFAULT;
	}

	return 0;

err:
	pvrdma_uar_free(vdev, &context->uar);
	return ret;
}

/**
 * pvrdma_dealloc_ucontext - deallocate ucontext
 * @ibcontext: the ucontext
 */
void pvrdma_dealloc_ucontext(struct ib_ucontext *ibcontext)
{
	struct pvrdma_ucontext *context = to_vucontext(ibcontext);
	union pvrdma_cmd_req req = {};
	struct pvrdma_cmd_destroy_uc *cmd = &req.destroy_uc;
	int ret;

	cmd->hdr.cmd = PVRDMA_CMD_DESTROY_UC;
	cmd->ctx_handle = context->ctx_handle;

	ret = pvrdma_cmd_post(context->dev, &req, NULL, 0);
	if (ret < 0)
		dev_warn(&context->dev->pdev->dev,
			 "destroy ucontext failed, error: %d\n", ret);

	/* Free the UAR even if the device command failed */
	pvrdma_uar_free(to_vdev(ibcontext->device), &context->uar);
}

/**
 * pvrdma_mmap - create mmap region
 * @ibcontext: the user context
 * @vma: the VMA
 *
 * @return: 0 on success, otherwise errno.
 */
int pvrdma_mmap(struct ib_ucontext *ibcontext, struct vm_area_struct *vma)
{
	struct pvrdma_ucontext *context = to_vucontext(ibcontext);
	unsigned long start = vma->vm_start;
	unsigned long size = vma->vm_end - vma->vm_start;
	unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;

	dev_dbg(&context->dev->pdev->dev, "create mmap region\n");

	if ((size != PAGE_SIZE) || (offset & ~PAGE_MASK)) {
		dev_warn(&context->dev->pdev->dev,
			 "invalid params for mmap region\n");
		return -EINVAL;
	}

	/* Map UAR to kernel space, VM_LOCKED? */
	vma->vm_flags |= VM_DONTCOPY | VM_DONTEXPAND;
	vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
	if (io_remap_pfn_range(vma, start, context->uar.pfn, size,
			       vma->vm_page_prot))
		return -EAGAIN;

	return 0;
}

/**
 * pvrdma_alloc_pd - allocate protection domain
 * @ibpd: PD pointer
 * @context: user context
 * @udata: user data
 *
 * @return: the ib_pd protection domain pointer on success, otherwise errno.
 */
int pvrdma_alloc_pd(struct ib_pd *ibpd, struct ib_ucontext *context,
		    struct ib_udata *udata)
{
	struct ib_device *ibdev = ibpd->device;
	struct pvrdma_pd *pd = to_vpd(ibpd);
	struct pvrdma_dev *dev = to_vdev(ibdev);
	union pvrdma_cmd_req req = {};
	union pvrdma_cmd_resp rsp = {};
	struct pvrdma_cmd_create_pd *cmd = &req.create_pd;
	struct pvrdma_cmd_create_pd_resp *resp = &rsp.create_pd_resp;
	struct pvrdma_alloc_pd_resp pd_resp = {0};
	int ret;

	/* Check allowed max pds */
	if (!atomic_add_unless(&dev->num_pds, 1, dev->dsr->caps.max_pd))
		return -ENOMEM;

	cmd->hdr.cmd = PVRDMA_CMD_CREATE_PD;
	cmd->ctx_handle = (context) ? to_vucontext(context)->ctx_handle : 0;
	ret = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_CREATE_PD_RESP);
	if (ret < 0) {
		dev_warn(&dev->pdev->dev,
			 "failed to allocate protection domain, error: %d\n",
			 ret);
		goto err;
	}

	pd->privileged = !context;
	pd->pd_handle = resp->pd_handle;
	pd->pdn = resp->pd_handle;
	pd_resp.pdn = resp->pd_handle;

	if (context) {
		if (ib_copy_to_udata(udata, &pd_resp, sizeof(pd_resp))) {
			dev_warn(&dev->pdev->dev,
				 "failed to copy back protection domain\n");
			pvrdma_dealloc_pd(&pd->ibpd);
			return -EFAULT;
		}
	}

	/* u32 pd handle */
	return 0;

err:
	atomic_dec(&dev->num_pds);
	return ret;
}

/**
 * pvrdma_dealloc_pd - deallocate protection domain
 * @pd: the protection domain to be released
 *
 * @return: 0 on success, otherwise errno.
 */
void pvrdma_dealloc_pd(struct ib_pd *pd)
{
	struct pvrdma_dev *dev = to_vdev(pd->device);
	union pvrdma_cmd_req req = {};
	struct pvrdma_cmd_destroy_pd *cmd = &req.destroy_pd;
	int ret;

	cmd->hdr.cmd = PVRDMA_CMD_DESTROY_PD;
	cmd->pd_handle = to_vpd(pd)->pd_handle;

	ret = pvrdma_cmd_post(dev, &req, NULL, 0);
	if (ret)
		dev_warn(&dev->pdev->dev,
			 "could not dealloc protection domain, error: %d\n",
			 ret);

	atomic_dec(&dev->num_pds);
}

/**
 * pvrdma_create_ah - create an address handle
 * @pd: the protection domain
 * @ah_attr: the attributes of the AH
 * @udata: user data blob
 * @flags: create address handle flags (see enum rdma_create_ah_flags)
 *
 * @return: the ib_ah pointer on success, otherwise errno.
 */
struct ib_ah *pvrdma_create_ah(struct ib_pd *pd, struct rdma_ah_attr *ah_attr,
			       u32 flags, struct ib_udata *udata)
{
	struct pvrdma_dev *dev = to_vdev(pd->device);
	struct pvrdma_ah *ah;
	const struct ib_global_route *grh;
	u8 port_num = rdma_ah_get_port_num(ah_attr);

	if (!(rdma_ah_get_ah_flags(ah_attr) & IB_AH_GRH))
		return ERR_PTR(-EINVAL);

	grh = rdma_ah_read_grh(ah_attr);
	if ((ah_attr->type != RDMA_AH_ATTR_TYPE_ROCE)  ||
	    rdma_is_multicast_addr((struct in6_addr *)grh->dgid.raw))
		return ERR_PTR(-EINVAL);

	if (!atomic_add_unless(&dev->num_ahs, 1, dev->dsr->caps.max_ah))
		return ERR_PTR(-ENOMEM);

	ah = kzalloc(sizeof(*ah), GFP_ATOMIC);
	if (!ah) {
		atomic_dec(&dev->num_ahs);
		return ERR_PTR(-ENOMEM);
	}

	ah->av.port_pd = to_vpd(pd)->pd_handle | (port_num << 24);
	ah->av.src_path_bits = rdma_ah_get_path_bits(ah_attr);
	ah->av.src_path_bits |= 0x80;
	ah->av.gid_index = grh->sgid_index;
	ah->av.hop_limit = grh->hop_limit;
	ah->av.sl_tclass_flowlabel = (grh->traffic_class << 20) |
				      grh->flow_label;
	memcpy(ah->av.dgid, grh->dgid.raw, 16);
	memcpy(ah->av.dmac, ah_attr->roce.dmac, ETH_ALEN);

	ah->ibah.device = pd->device;
	ah->ibah.pd = pd;
	ah->ibah.uobject = NULL;

	return &ah->ibah;
}

/**
 * pvrdma_destroy_ah - destroy an address handle
 * @ah: the address handle to destroyed
 * @flags: destroy address handle flags (see enum rdma_destroy_ah_flags)
 *
 * @return: 0 on success.
 */
int pvrdma_destroy_ah(struct ib_ah *ah, u32 flags)
{
	struct pvrdma_dev *dev = to_vdev(ah->device);

	kfree(to_vah(ah));
	atomic_dec(&dev->num_ahs);

	return 0;
}
Commit	Line	Data
29c8d9eb AR	1	/*
	2	* Copyright (c) 2012-2016 VMware, Inc. All rights reserved.
	3	*
	4	* This program is free software; you can redistribute it and/or
	5	* modify it under the terms of EITHER the GNU General Public License
	6	* version 2 as published by the Free Software Foundation or the BSD
	7	* 2-Clause License. This program is distributed in the hope that it
	8	* will be useful, but WITHOUT ANY WARRANTY; WITHOUT EVEN THE IMPLIED
	9	* WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
	10	* See the GNU General Public License version 2 for more details at
	11	* http://www.gnu.org/licenses/old-licenses/gpl-2.0.en.html.
	12	*
	13	* You should have received a copy of the GNU General Public License
	14	* along with this program available in the file COPYING in the main
	15	* directory of this source tree.
	16	*
	17	* The BSD 2-Clause License
	18	*
	19	* Redistribution and use in source and binary forms, with or
	20	* without modification, are permitted provided that the following
	21	* conditions are met:
	22	*
	23	* - Redistributions of source code must retain the above
	24	* copyright notice, this list of conditions and the following
	25	* disclaimer.
	26	*
	27	* - Redistributions in binary form must reproduce the above
	28	* copyright notice, this list of conditions and the following
	29	* disclaimer in the documentation and/or other materials
	30	* provided with the distribution.
	31	*
	32	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	33	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	34	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
	35	* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
	36	* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
	37	* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
	38	* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
	39	* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	40	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
	41	* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
	42	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
	43	* OF THE POSSIBILITY OF SUCH DAMAGE.
	44	*/
	45
	46	#include <asm/page.h>
	47	#include <linux/inet.h>
	48	#include <linux/io.h>
	49	#include <rdma/ib_addr.h>
	50	#include <rdma/ib_smi.h>
	51	#include <rdma/ib_user_verbs.h>
	52	#include <rdma/vmw_pvrdma-abi.h>
	53
	54	#include "pvrdma.h"
	55
	56	/**
	57	* pvrdma_query_device - query device
	58	* @ibdev: the device to query
	59	* @props: the device properties
	60	* @uhw: user data
	61	*
	62	* @return: 0 on success, otherwise negative errno
	63	*/
	64	int pvrdma_query_device(struct ib_device *ibdev,
65	struct ib_device_attr *props,
66	struct ib_udata *uhw)
67	{
68	struct pvrdma_dev *dev = to_vdev(ibdev);
69
70	if (uhw->inlen \|\| uhw->outlen)
71	return -EINVAL;
72
73	memset(props, 0, sizeof(*props));
74
75	props->fw_ver = dev->dsr->caps.fw_ver;
76	props->sys_image_guid = dev->dsr->caps.sys_image_guid;
77	props->max_mr_size = dev->dsr->caps.max_mr_size;
78	props->page_size_cap = dev->dsr->caps.page_size_cap;
79	props->vendor_id = dev->dsr->caps.vendor_id;
80	props->vendor_part_id = dev->pdev->device;
81	props->hw_ver = dev->dsr->caps.hw_ver;
82	props->max_qp = dev->dsr->caps.max_qp;
83	props->max_qp_wr = dev->dsr->caps.max_qp_wr;
84	props->device_cap_flags = dev->dsr->caps.device_cap_flags;
33023fb8 SW	85	props->max_send_sge = dev->dsr->caps.max_sge;
33023fb8 SW	86	props->max_recv_sge = dev->dsr->caps.max_sge;
a31a2a3b AR	87	props->max_sge_rd = PVRDMA_GET_CAP(dev, dev->dsr->caps.max_sge,
a31a2a3b AR	88	dev->dsr->caps.max_sge_rd);
8b10ba78 BT	89	props->max_srq = dev->dsr->caps.max_srq;
	90	props->max_srq_wr = dev->dsr->caps.max_srq_wr;
	91	props->max_srq_sge = dev->dsr->caps.max_srq_sge;
29c8d9eb AR	92	props->max_cq = dev->dsr->caps.max_cq;
	93	props->max_cqe = dev->dsr->caps.max_cqe;
	94	props->max_mr = dev->dsr->caps.max_mr;
	95	props->max_pd = dev->dsr->caps.max_pd;
	96	props->max_qp_rd_atom = dev->dsr->caps.max_qp_rd_atom;
	97	props->max_qp_init_rd_atom = dev->dsr->caps.max_qp_init_rd_atom;
	98	props->atomic_cap =
	99	dev->dsr->caps.atomic_ops &
	100	(PVRDMA_ATOMIC_OP_COMP_SWAP \| PVRDMA_ATOMIC_OP_FETCH_ADD) ?
	101	IB_ATOMIC_HCA : IB_ATOMIC_NONE;
	102	props->masked_atomic_cap = props->atomic_cap;
	103	props->max_ah = dev->dsr->caps.max_ah;
	104	props->max_pkeys = dev->dsr->caps.max_pkeys;
	105	props->local_ca_ack_delay = dev->dsr->caps.local_ca_ack_delay;
	106	if ((dev->dsr->caps.bmme_flags & PVRDMA_BMME_FLAG_LOCAL_INV) &&
	107	(dev->dsr->caps.bmme_flags & PVRDMA_BMME_FLAG_REMOTE_INV) &&
	108	(dev->dsr->caps.bmme_flags & PVRDMA_BMME_FLAG_FAST_REG_WR)) {
	109	props->device_cap_flags \|= IB_DEVICE_MEM_MGT_EXTENSIONS;
a31a2a3b AR	110	props->max_fast_reg_page_list_len = PVRDMA_GET_CAP(dev,
	111	PVRDMA_MAX_FAST_REG_PAGES,
	112	dev->dsr->caps.max_fast_reg_page_list_len);
29c8d9eb AR	113	}
29c8d9eb AR	114
a31a2a3b AR	115	props->device_cap_flags \|= IB_DEVICE_PORT_ACTIVE_EVENT \|
	116	IB_DEVICE_RC_RNR_NAK_GEN;
	117
29c8d9eb AR	118	return 0;
	119	}
	120
	121	/**
	122	* pvrdma_query_port - query device port attributes
	123	* @ibdev: the device to query
	124	* @port: the port number
	125	* @props: the device properties
	126	*
	127	* @return: 0 on success, otherwise negative errno
	128	*/
	129	int pvrdma_query_port(struct ib_device *ibdev, u8 port,
	130	struct ib_port_attr *props)
	131	{
	132	struct pvrdma_dev *dev = to_vdev(ibdev);
	133	union pvrdma_cmd_req req;
	134	union pvrdma_cmd_resp rsp;
	135	struct pvrdma_cmd_query_port *cmd = &req.query_port;
	136	struct pvrdma_cmd_query_port_resp *resp = &rsp.query_port_resp;
	137	int err;
	138
	139	memset(cmd, 0, sizeof(*cmd));
	140	cmd->hdr.cmd = PVRDMA_CMD_QUERY_PORT;
	141	cmd->port_num = port;
	142
	143	err = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_QUERY_PORT_RESP);
	144	if (err < 0) {
	145	dev_warn(&dev->pdev->dev,
	146	"could not query port, error: %d\n", err);
	147	return err;
	148	}
	149
c4550c63	150	/* props being zeroed by the caller, avoid zeroing it here */
29c8d9eb AR	151
	152	props->state = pvrdma_port_state_to_ib(resp->attrs.state);
	153	props->max_mtu = pvrdma_mtu_to_ib(resp->attrs.max_mtu);
	154	props->active_mtu = pvrdma_mtu_to_ib(resp->attrs.active_mtu);
	155	props->gid_tbl_len = resp->attrs.gid_tbl_len;
	156	props->port_cap_flags =
	157	pvrdma_port_cap_flags_to_ib(resp->attrs.port_cap_flags);
2f944c0f JG	158	props->port_cap_flags \|= IB_PORT_CM_SUP;
2f944c0f JG	159	props->ip_gids = true;
29c8d9eb AR	160	props->max_msg_sz = resp->attrs.max_msg_sz;
	161	props->bad_pkey_cntr = resp->attrs.bad_pkey_cntr;
	162	props->qkey_viol_cntr = resp->attrs.qkey_viol_cntr;
	163	props->pkey_tbl_len = resp->attrs.pkey_tbl_len;
	164	props->lid = resp->attrs.lid;
	165	props->sm_lid = resp->attrs.sm_lid;
	166	props->lmc = resp->attrs.lmc;
	167	props->max_vl_num = resp->attrs.max_vl_num;
	168	props->sm_sl = resp->attrs.sm_sl;
	169	props->subnet_timeout = resp->attrs.subnet_timeout;
	170	props->init_type_reply = resp->attrs.init_type_reply;
	171	props->active_width = pvrdma_port_width_to_ib(resp->attrs.active_width);
	172	props->active_speed = pvrdma_port_speed_to_ib(resp->attrs.active_speed);
	173	props->phys_state = resp->attrs.phys_state;
	174
	175	return 0;
	176	}
	177
	178	/**
	179	* pvrdma_query_gid - query device gid
	180	* @ibdev: the device to query
	181	* @port: the port number
	182	* @index: the index
	183	* @gid: the device gid value
	184	*
	185	* @return: 0 on success, otherwise negative errno
	186	*/
	187	int pvrdma_query_gid(struct ib_device *ibdev, u8 port, int index,
	188	union ib_gid *gid)
	189	{
	190	struct pvrdma_dev *dev = to_vdev(ibdev);
	191
	192	if (index >= dev->dsr->caps.gid_tbl_len)
	193	return -EINVAL;
	194
	195	memcpy(gid, &dev->sgid_tbl[index], sizeof(union ib_gid));
	196
	197	return 0;
	198	}
	199
	200	/**
	201	* pvrdma_query_pkey - query device port's P_Key table
	202	* @ibdev: the device to query
	203	* @port: the port number
	204	* @index: the index
	205	* @pkey: the device P_Key value
	206	*
	207	* @return: 0 on success, otherwise negative errno
	208	*/
	209	int pvrdma_query_pkey(struct ib_device *ibdev, u8 port, u16 index,
	210	u16 *pkey)
	211	{
	212	int err = 0;
	213	union pvrdma_cmd_req req;
	214	union pvrdma_cmd_resp rsp;
	215	struct pvrdma_cmd_query_pkey *cmd = &req.query_pkey;
	216
	217	memset(cmd, 0, sizeof(*cmd));
	218	cmd->hdr.cmd = PVRDMA_CMD_QUERY_PKEY;
	219	cmd->port_num = port;
	220	cmd->index = index;
	221
	222	err = pvrdma_cmd_post(to_vdev(ibdev), &req, &rsp,
	223	PVRDMA_CMD_QUERY_PKEY_RESP);
224	if (err < 0) {
225	dev_warn(&to_vdev(ibdev)->pdev->dev,
226	"could not query pkey, error: %d\n", err);
227	return err;
228	}
229
230	*pkey = rsp.query_pkey_resp.pkey;
231
232	return 0;
233	}
234
235	enum rdma_link_layer pvrdma_port_link_layer(struct ib_device *ibdev,
236	u8 port)
237	{
238	return IB_LINK_LAYER_ETHERNET;
239	}
240
241	int pvrdma_modify_device(struct ib_device *ibdev, int mask,
242	struct ib_device_modify *props)
243	{
244	unsigned long flags;
245
246	if (mask & ~(IB_DEVICE_MODIFY_SYS_IMAGE_GUID \|
247	IB_DEVICE_MODIFY_NODE_DESC)) {
248	dev_warn(&to_vdev(ibdev)->pdev->dev,
249	"unsupported device modify mask %#x\n", mask);
250	return -EOPNOTSUPP;
251	}
252
253	if (mask & IB_DEVICE_MODIFY_NODE_DESC) {
254	spin_lock_irqsave(&to_vdev(ibdev)->desc_lock, flags);
255	memcpy(ibdev->node_desc, props->node_desc, 64);
256	spin_unlock_irqrestore(&to_vdev(ibdev)->desc_lock, flags);
257	}
258
259	if (mask & IB_DEVICE_MODIFY_SYS_IMAGE_GUID) {
260	mutex_lock(&to_vdev(ibdev)->port_mutex);
261	to_vdev(ibdev)->sys_image_guid =
262	cpu_to_be64(props->sys_image_guid);
263	mutex_unlock(&to_vdev(ibdev)->port_mutex);
264	}
265
266	return 0;
267	}
268
269	/**
270	* pvrdma_modify_port - modify device port attributes
271	* @ibdev: the device to modify
272	* @port: the port number
273	* @mask: attributes to modify
274	* @props: the device properties
275	*
276	* @return: 0 on success, otherwise negative errno
277	*/
278	int pvrdma_modify_port(struct ib_device *ibdev, u8 port, int mask,
279	struct ib_port_modify *props)
280	{
281	struct ib_port_attr attr;
282	struct pvrdma_dev *vdev = to_vdev(ibdev);
283	int ret;
284
285	if (mask & ~IB_PORT_SHUTDOWN) {
286	dev_warn(&vdev->pdev->dev,
287	"unsupported port modify mask %#x\n", mask);
288	return -EOPNOTSUPP;
289	}
290
291	mutex_lock(&vdev->port_mutex);
c4550c63	292	ret = ib_query_port(ibdev, port, &attr);
29c8d9eb AR	293	if (ret)
	294	goto out;
	295
	296	vdev->port_cap_mask \|= props->set_port_cap_mask;
	297	vdev->port_cap_mask &= ~props->clr_port_cap_mask;
	298
	299	if (mask & IB_PORT_SHUTDOWN)
	300	vdev->ib_active = false;
	301
	302	out:
	303	mutex_unlock(&vdev->port_mutex);
	304	return ret;
	305	}
	306
	307	/**
	308	* pvrdma_alloc_ucontext - allocate ucontext
a2a074ef	309	* @uctx: the uverbs countext
29c8d9eb AR	310	* @udata: user data
29c8d9eb AR	311	*
a2a074ef	312	* @return: zero on success, otherwise errno.
29c8d9eb	313	*/
a2a074ef	314	int pvrdma_alloc_ucontext(struct ib_ucontext uctx, struct ib_udata udata)
29c8d9eb	315	{
a2a074ef	316	struct ib_device *ibdev = uctx->device;
29c8d9eb	317	struct pvrdma_dev *vdev = to_vdev(ibdev);
a2a074ef LR	318	struct pvrdma_ucontext *context = to_vucontext(uctx);
	319	union pvrdma_cmd_req req = {};
	320	union pvrdma_cmd_resp rsp = {};
29c8d9eb AR	321	struct pvrdma_cmd_create_uc *cmd = &req.create_uc;
29c8d9eb AR	322	struct pvrdma_cmd_create_uc_resp *resp = &rsp.create_uc_resp;
a2a074ef	323	struct pvrdma_alloc_ucontext_resp uresp = {};
29c8d9eb	324	int ret;
29c8d9eb AR	325
29c8d9eb AR	326	if (!vdev->ib_active)
a2a074ef	327	return -EAGAIN;
29c8d9eb AR	328
	329	context->dev = vdev;
	330	ret = pvrdma_uar_alloc(vdev, &context->uar);
a2a074ef LR	331	if (ret)
a2a074ef LR	332	return -ENOMEM;
29c8d9eb AR	333
29c8d9eb AR	334	/* get ctx_handle from host */
8aa04ad3 AR	335	if (vdev->dsr_version < PVRDMA_PPN64_VERSION)
	336	cmd->pfn = context->uar.pfn;
	337	else
	338	cmd->pfn64 = context->uar.pfn;
	339
29c8d9eb AR	340	cmd->hdr.cmd = PVRDMA_CMD_CREATE_UC;
	341	ret = pvrdma_cmd_post(vdev, &req, &rsp, PVRDMA_CMD_CREATE_UC_RESP);
	342	if (ret < 0) {
	343	dev_warn(&vdev->pdev->dev,
	344	"could not create ucontext, error: %d\n", ret);
29c8d9eb AR	345	goto err;
	346	}
	347
	348	context->ctx_handle = resp->ctx_handle;
	349
	350	/* copy back to user */
	351	uresp.qp_tab_size = vdev->dsr->caps.max_qp;
	352	ret = ib_copy_to_udata(udata, &uresp, sizeof(uresp));
	353	if (ret) {
	354	pvrdma_uar_free(vdev, &context->uar);
29c8d9eb	355	pvrdma_dealloc_ucontext(&context->ibucontext);
a2a074ef	356	return -EFAULT;
29c8d9eb AR	357	}
29c8d9eb AR	358
a2a074ef	359	return 0;
29c8d9eb AR	360
	361	err:
	362	pvrdma_uar_free(vdev, &context->uar);
a2a074ef	363	return ret;
29c8d9eb AR	364	}
	365
	366	/**
	367	* pvrdma_dealloc_ucontext - deallocate ucontext
	368	* @ibcontext: the ucontext
29c8d9eb	369	*/
a2a074ef	370	void pvrdma_dealloc_ucontext(struct ib_ucontext *ibcontext)
29c8d9eb AR	371	{
29c8d9eb AR	372	struct pvrdma_ucontext *context = to_vucontext(ibcontext);
a2a074ef	373	union pvrdma_cmd_req req = {};
29c8d9eb AR	374	struct pvrdma_cmd_destroy_uc *cmd = &req.destroy_uc;
	375	int ret;
	376
29c8d9eb AR	377	cmd->hdr.cmd = PVRDMA_CMD_DESTROY_UC;
	378	cmd->ctx_handle = context->ctx_handle;
	379
	380	ret = pvrdma_cmd_post(context->dev, &req, NULL, 0);
	381	if (ret < 0)
	382	dev_warn(&context->dev->pdev->dev,
	383	"destroy ucontext failed, error: %d\n", ret);
	384
	385	/* Free the UAR even if the device command failed */
	386	pvrdma_uar_free(to_vdev(ibcontext->device), &context->uar);
29c8d9eb AR	387	}
	388
	389	/**
	390	* pvrdma_mmap - create mmap region
	391	* @ibcontext: the user context
	392	* @vma: the VMA
	393	*
	394	* @return: 0 on success, otherwise errno.
	395	*/
	396	int pvrdma_mmap(struct ib_ucontext ibcontext, struct vm_area_struct vma)
	397	{
	398	struct pvrdma_ucontext *context = to_vucontext(ibcontext);
	399	unsigned long start = vma->vm_start;
	400	unsigned long size = vma->vm_end - vma->vm_start;
	401	unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
	402
	403	dev_dbg(&context->dev->pdev->dev, "create mmap region\n");
	404
	405	if ((size != PAGE_SIZE) \|\| (offset & ~PAGE_MASK)) {
	406	dev_warn(&context->dev->pdev->dev,
	407	"invalid params for mmap region\n");
	408	return -EINVAL;
	409	}
	410
	411	/* Map UAR to kernel space, VM_LOCKED? */
	412	vma->vm_flags \|= VM_DONTCOPY \| VM_DONTEXPAND;
	413	vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
	414	if (io_remap_pfn_range(vma, start, context->uar.pfn, size,
	415	vma->vm_page_prot))
	416	return -EAGAIN;
	417
	418	return 0;
	419	}
	420
	421	/**
	422	* pvrdma_alloc_pd - allocate protection domain
21a428a0	423	* @ibpd: PD pointer
29c8d9eb AR	424	* @context: user context
	425	* @udata: user data
	426	*
	427	* @return: the ib_pd protection domain pointer on success, otherwise errno.
	428	*/
21a428a0 LR	429	int pvrdma_alloc_pd(struct ib_pd ibpd, struct ib_ucontext context,
21a428a0 LR	430	struct ib_udata *udata)
29c8d9eb	431	{
21a428a0 LR	432	struct ib_device *ibdev = ibpd->device;
21a428a0 LR	433	struct pvrdma_pd *pd = to_vpd(ibpd);
29c8d9eb	434	struct pvrdma_dev *dev = to_vdev(ibdev);
21a428a0 LR	435	union pvrdma_cmd_req req = {};
21a428a0 LR	436	union pvrdma_cmd_resp rsp = {};
29c8d9eb AR	437	struct pvrdma_cmd_create_pd *cmd = &req.create_pd;
29c8d9eb AR	438	struct pvrdma_cmd_create_pd_resp *resp = &rsp.create_pd_resp;
1f5a6c47	439	struct pvrdma_alloc_pd_resp pd_resp = {0};
29c8d9eb	440	int ret;
29c8d9eb AR	441
	442	/* Check allowed max pds */
	443	if (!atomic_add_unless(&dev->num_pds, 1, dev->dsr->caps.max_pd))
21a428a0	444	return -ENOMEM;
29c8d9eb	445
29c8d9eb AR	446	cmd->hdr.cmd = PVRDMA_CMD_CREATE_PD;
	447	cmd->ctx_handle = (context) ? to_vucontext(context)->ctx_handle : 0;
	448	ret = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_CREATE_PD_RESP);
	449	if (ret < 0) {
	450	dev_warn(&dev->pdev->dev,
	451	"failed to allocate protection domain, error: %d\n",
	452	ret);
21a428a0	453	goto err;
29c8d9eb AR	454	}
	455
	456	pd->privileged = !context;
	457	pd->pd_handle = resp->pd_handle;
	458	pd->pdn = resp->pd_handle;
1f5a6c47	459	pd_resp.pdn = resp->pd_handle;
29c8d9eb AR	460
29c8d9eb AR	461	if (context) {
1f5a6c47	462	if (ib_copy_to_udata(udata, &pd_resp, sizeof(pd_resp))) {
29c8d9eb AR	463	dev_warn(&dev->pdev->dev,
	464	"failed to copy back protection domain\n");
	465	pvrdma_dealloc_pd(&pd->ibpd);
21a428a0	466	return -EFAULT;
29c8d9eb AR	467	}
	468	}
	469
	470	/* u32 pd handle */
21a428a0	471	return 0;
29c8d9eb	472
29c8d9eb AR	473	err:
29c8d9eb AR	474	atomic_dec(&dev->num_pds);
21a428a0	475	return ret;
29c8d9eb AR	476	}
	477
	478	/**
	479	* pvrdma_dealloc_pd - deallocate protection domain
	480	* @pd: the protection domain to be released
	481	*
	482	* @return: 0 on success, otherwise errno.
	483	*/
21a428a0	484	void pvrdma_dealloc_pd(struct ib_pd *pd)
29c8d9eb AR	485	{
29c8d9eb AR	486	struct pvrdma_dev *dev = to_vdev(pd->device);
21a428a0	487	union pvrdma_cmd_req req = {};
29c8d9eb AR	488	struct pvrdma_cmd_destroy_pd *cmd = &req.destroy_pd;
	489	int ret;
	490
29c8d9eb AR	491	cmd->hdr.cmd = PVRDMA_CMD_DESTROY_PD;
	492	cmd->pd_handle = to_vpd(pd)->pd_handle;
	493
	494	ret = pvrdma_cmd_post(dev, &req, NULL, 0);
	495	if (ret)
	496	dev_warn(&dev->pdev->dev,
	497	"could not dealloc protection domain, error: %d\n",
	498	ret);
	499
29c8d9eb	500	atomic_dec(&dev->num_pds);
29c8d9eb AR	501	}
	502
	503	/**
	504	* pvrdma_create_ah - create an address handle
	505	* @pd: the protection domain
	506	* @ah_attr: the attributes of the AH
	507	* @udata: user data blob
b090c4e3	508	* @flags: create address handle flags (see enum rdma_create_ah_flags)
29c8d9eb AR	509	*
	510	* @return: the ib_ah pointer on success, otherwise errno.
	511	*/
90898850	512	struct ib_ah pvrdma_create_ah(struct ib_pd pd, struct rdma_ah_attr *ah_attr,
b090c4e3	513	u32 flags, struct ib_udata *udata)
29c8d9eb AR	514	{
	515	struct pvrdma_dev *dev = to_vdev(pd->device);
	516	struct pvrdma_ah *ah;
d8966fcd DC	517	const struct ib_global_route *grh;
d8966fcd DC	518	u8 port_num = rdma_ah_get_port_num(ah_attr);
29c8d9eb	519
d8966fcd	520	if (!(rdma_ah_get_ah_flags(ah_attr) & IB_AH_GRH))
29c8d9eb	521	return ERR_PTR(-EINVAL);
29c8d9eb	522
44c58487 DC	523	grh = rdma_ah_read_grh(ah_attr);
44c58487 DC	524	if ((ah_attr->type != RDMA_AH_ATTR_TYPE_ROCE) \|\|
d8966fcd	525	rdma_is_multicast_addr((struct in6_addr *)grh->dgid.raw))
29c8d9eb AR	526	return ERR_PTR(-EINVAL);
	527
	528	if (!atomic_add_unless(&dev->num_ahs, 1, dev->dsr->caps.max_ah))
	529	return ERR_PTR(-ENOMEM);
	530
a276a4d9	531	ah = kzalloc(sizeof(*ah), GFP_ATOMIC);
29c8d9eb AR	532	if (!ah) {
	533	atomic_dec(&dev->num_ahs);
	534	return ERR_PTR(-ENOMEM);
	535	}
	536
d8966fcd DC	537	ah->av.port_pd = to_vpd(pd)->pd_handle \| (port_num << 24);
d8966fcd DC	538	ah->av.src_path_bits = rdma_ah_get_path_bits(ah_attr);
29c8d9eb	539	ah->av.src_path_bits \|= 0x80;
d8966fcd DC	540	ah->av.gid_index = grh->sgid_index;
	541	ah->av.hop_limit = grh->hop_limit;
	542	ah->av.sl_tclass_flowlabel = (grh->traffic_class << 20) \|
	543	grh->flow_label;
	544	memcpy(ah->av.dgid, grh->dgid.raw, 16);
44c58487	545	memcpy(ah->av.dmac, ah_attr->roce.dmac, ETH_ALEN);
29c8d9eb AR	546
	547	ah->ibah.device = pd->device;
	548	ah->ibah.pd = pd;
	549	ah->ibah.uobject = NULL;
	550
	551	return &ah->ibah;
	552	}
	553
	554	/**
	555	* pvrdma_destroy_ah - destroy an address handle
	556	* @ah: the address handle to destroyed
2553ba21	557	* @flags: destroy address handle flags (see enum rdma_destroy_ah_flags)
29c8d9eb AR	558	*
	559	* @return: 0 on success.
	560	*/
2553ba21	561	int pvrdma_destroy_ah(struct ib_ah *ah, u32 flags)
29c8d9eb AR	562	{
	563	struct pvrdma_dev *dev = to_vdev(ah->device);
	564
	565	kfree(to_vah(ah));
	566	atomic_dec(&dev->num_ahs);
	567
	568	return 0;
	569	}