mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
synced 2025-08-30 21:52:21 +00:00

Presently, RDMA devices are always registered within the init network namespace, even if the associated devlink device's namespace was changed via a devlink reload. This mismatch leads to discrepancies between the network namespace of the devlink device and that of the RDMA device. Therefore, extend the RDMA device allocation API to optionally take the net namespace. This isn't limited to devices that support devlink but allows all users to provide the network namespace if they need to do so. If a network namespace is provided during device allocation, it's up to the caller to make sure the namespace stays valid until ib_register_device() is called. Signed-off-by: Shay Drory <shayd@nvidia.com> Signed-off-by: Mark Bloch <mbloch@nvidia.com> Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
620 lines
15 KiB
C
620 lines
15 KiB
C
// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
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/*
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* Copyright(c) 2016 - 2018 Intel Corporation.
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/dma-mapping.h>
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#include "vt.h"
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#include "cq.h"
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#include "trace.h"
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#define RVT_UVERBS_ABI_VERSION 2
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MODULE_LICENSE("Dual BSD/GPL");
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MODULE_DESCRIPTION("RDMA Verbs Transport Library");
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static int __init rvt_init(void)
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{
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int ret = rvt_driver_cq_init();
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if (ret)
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pr_err("Error in driver CQ init.\n");
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return ret;
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}
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module_init(rvt_init);
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static void __exit rvt_cleanup(void)
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{
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rvt_cq_exit();
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}
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module_exit(rvt_cleanup);
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/**
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* rvt_alloc_device - allocate rdi
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* @size: how big of a structure to allocate
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* @nports: number of ports to allocate array slots for
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*
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* Use IB core device alloc to allocate space for the rdi which is assumed to be
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* inside of the ib_device. Any extra space that drivers require should be
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* included in size.
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*
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* We also allocate a port array based on the number of ports.
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*
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* Return: pointer to allocated rdi
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*/
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struct rvt_dev_info *rvt_alloc_device(size_t size, int nports)
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{
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struct rvt_dev_info *rdi;
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rdi = container_of(_ib_alloc_device(size, &init_net), struct rvt_dev_info, ibdev);
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if (!rdi)
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return rdi;
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rdi->ports = kcalloc(nports, sizeof(*rdi->ports), GFP_KERNEL);
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if (!rdi->ports)
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ib_dealloc_device(&rdi->ibdev);
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return rdi;
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}
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EXPORT_SYMBOL(rvt_alloc_device);
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/**
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* rvt_dealloc_device - deallocate rdi
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* @rdi: structure to free
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*
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* Free a structure allocated with rvt_alloc_device()
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*/
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void rvt_dealloc_device(struct rvt_dev_info *rdi)
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{
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kfree(rdi->ports);
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ib_dealloc_device(&rdi->ibdev);
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}
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EXPORT_SYMBOL(rvt_dealloc_device);
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static int rvt_query_device(struct ib_device *ibdev,
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struct ib_device_attr *props,
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struct ib_udata *uhw)
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{
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struct rvt_dev_info *rdi = ib_to_rvt(ibdev);
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if (uhw->inlen || uhw->outlen)
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return -EINVAL;
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/*
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* Return rvt_dev_info.dparms.props contents
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*/
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*props = rdi->dparms.props;
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return 0;
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}
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static int rvt_get_numa_node(struct ib_device *ibdev)
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{
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struct rvt_dev_info *rdi = ib_to_rvt(ibdev);
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return rdi->dparms.node;
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}
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static int rvt_modify_device(struct ib_device *device,
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int device_modify_mask,
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struct ib_device_modify *device_modify)
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{
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/*
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* There is currently no need to supply this based on qib and hfi1.
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* Future drivers may need to implement this though.
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*/
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return -EOPNOTSUPP;
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}
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/**
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* rvt_query_port - Passes the query port call to the driver
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* @ibdev: Verbs IB dev
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* @port_num: port number, 1 based from ib core
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* @props: structure to hold returned properties
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*
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* Return: 0 on success
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*/
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static int rvt_query_port(struct ib_device *ibdev, u32 port_num,
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struct ib_port_attr *props)
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{
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struct rvt_dev_info *rdi = ib_to_rvt(ibdev);
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struct rvt_ibport *rvp;
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u32 port_index = ibport_num_to_idx(ibdev, port_num);
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rvp = rdi->ports[port_index];
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/* props being zeroed by the caller, avoid zeroing it here */
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props->sm_lid = rvp->sm_lid;
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props->sm_sl = rvp->sm_sl;
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props->port_cap_flags = rvp->port_cap_flags;
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props->max_msg_sz = 0x80000000;
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props->pkey_tbl_len = rvt_get_npkeys(rdi);
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props->bad_pkey_cntr = rvp->pkey_violations;
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props->qkey_viol_cntr = rvp->qkey_violations;
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props->subnet_timeout = rvp->subnet_timeout;
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props->init_type_reply = 0;
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/* Populate the remaining ib_port_attr elements */
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return rdi->driver_f.query_port_state(rdi, port_num, props);
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}
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/**
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* rvt_modify_port - modify port
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* @ibdev: Verbs IB dev
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* @port_num: Port number, 1 based from ib core
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* @port_modify_mask: How to change the port
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* @props: Structure to fill in
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*
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* Return: 0 on success
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*/
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static int rvt_modify_port(struct ib_device *ibdev, u32 port_num,
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int port_modify_mask, struct ib_port_modify *props)
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{
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struct rvt_dev_info *rdi = ib_to_rvt(ibdev);
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struct rvt_ibport *rvp;
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int ret = 0;
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u32 port_index = ibport_num_to_idx(ibdev, port_num);
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rvp = rdi->ports[port_index];
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if (port_modify_mask & IB_PORT_OPA_MASK_CHG) {
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rvp->port_cap3_flags |= props->set_port_cap_mask;
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rvp->port_cap3_flags &= ~props->clr_port_cap_mask;
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} else {
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rvp->port_cap_flags |= props->set_port_cap_mask;
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rvp->port_cap_flags &= ~props->clr_port_cap_mask;
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}
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if (props->set_port_cap_mask || props->clr_port_cap_mask)
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rdi->driver_f.cap_mask_chg(rdi, port_num);
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if (port_modify_mask & IB_PORT_SHUTDOWN)
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ret = rdi->driver_f.shut_down_port(rdi, port_num);
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if (port_modify_mask & IB_PORT_RESET_QKEY_CNTR)
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rvp->qkey_violations = 0;
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return ret;
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}
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/**
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* rvt_query_pkey - Return a pkey from the table at a given index
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* @ibdev: Verbs IB dev
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* @port_num: Port number, 1 based from ib core
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* @index: Index into pkey table
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* @pkey: returned pkey from the port pkey table
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*
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* Return: 0 on failure pkey otherwise
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*/
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static int rvt_query_pkey(struct ib_device *ibdev, u32 port_num, u16 index,
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u16 *pkey)
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{
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/*
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* Driver will be responsible for keeping rvt_dev_info.pkey_table up to
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* date. This function will just return that value. There is no need to
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* lock, if a stale value is read and sent to the user so be it there is
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* no way to protect against that anyway.
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*/
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struct rvt_dev_info *rdi = ib_to_rvt(ibdev);
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u32 port_index;
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port_index = ibport_num_to_idx(ibdev, port_num);
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if (index >= rvt_get_npkeys(rdi))
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return -EINVAL;
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*pkey = rvt_get_pkey(rdi, port_index, index);
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return 0;
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}
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/**
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* rvt_query_gid - Return a gid from the table
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* @ibdev: Verbs IB dev
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* @port_num: Port number, 1 based from ib core
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* @guid_index: Index in table
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* @gid: Gid to return
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*
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* Return: 0 on success
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*/
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static int rvt_query_gid(struct ib_device *ibdev, u32 port_num,
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int guid_index, union ib_gid *gid)
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{
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struct rvt_dev_info *rdi;
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struct rvt_ibport *rvp;
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u32 port_index;
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/*
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* Driver is responsible for updating the guid table. Which will be used
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* to craft the return value. This will work similar to how query_pkey()
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* is being done.
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*/
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port_index = ibport_num_to_idx(ibdev, port_num);
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rdi = ib_to_rvt(ibdev);
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rvp = rdi->ports[port_index];
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gid->global.subnet_prefix = rvp->gid_prefix;
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return rdi->driver_f.get_guid_be(rdi, rvp, guid_index,
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&gid->global.interface_id);
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}
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/**
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* rvt_alloc_ucontext - Allocate a user context
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* @uctx: Verbs context
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* @udata: User data allocated
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*/
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static int rvt_alloc_ucontext(struct ib_ucontext *uctx, struct ib_udata *udata)
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{
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return 0;
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}
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/**
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* rvt_dealloc_ucontext - Free a user context
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* @context: Unused
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*/
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static void rvt_dealloc_ucontext(struct ib_ucontext *context)
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{
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return;
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}
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static int rvt_get_port_immutable(struct ib_device *ibdev, u32 port_num,
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struct ib_port_immutable *immutable)
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{
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struct rvt_dev_info *rdi = ib_to_rvt(ibdev);
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struct ib_port_attr attr;
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int err;
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immutable->core_cap_flags = rdi->dparms.core_cap_flags;
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err = ib_query_port(ibdev, port_num, &attr);
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if (err)
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return err;
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immutable->pkey_tbl_len = attr.pkey_tbl_len;
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immutable->gid_tbl_len = attr.gid_tbl_len;
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immutable->max_mad_size = rdi->dparms.max_mad_size;
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return 0;
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}
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enum {
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MISC,
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QUERY_DEVICE,
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MODIFY_DEVICE,
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QUERY_PORT,
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MODIFY_PORT,
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QUERY_PKEY,
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QUERY_GID,
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ALLOC_UCONTEXT,
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DEALLOC_UCONTEXT,
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GET_PORT_IMMUTABLE,
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CREATE_QP,
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MODIFY_QP,
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DESTROY_QP,
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QUERY_QP,
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POST_SEND,
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POST_RECV,
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POST_SRQ_RECV,
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CREATE_AH,
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DESTROY_AH,
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MODIFY_AH,
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QUERY_AH,
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CREATE_SRQ,
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MODIFY_SRQ,
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DESTROY_SRQ,
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QUERY_SRQ,
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ATTACH_MCAST,
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DETACH_MCAST,
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GET_DMA_MR,
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REG_USER_MR,
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DEREG_MR,
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ALLOC_MR,
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MAP_MR_SG,
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ALLOC_FMR,
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MAP_PHYS_FMR,
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UNMAP_FMR,
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DEALLOC_FMR,
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MMAP,
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CREATE_CQ,
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DESTROY_CQ,
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POLL_CQ,
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REQ_NOTFIY_CQ,
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RESIZE_CQ,
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ALLOC_PD,
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DEALLOC_PD,
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_VERB_IDX_MAX /* Must always be last! */
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};
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static const struct ib_device_ops rvt_dev_ops = {
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.uverbs_abi_ver = RVT_UVERBS_ABI_VERSION,
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.alloc_mr = rvt_alloc_mr,
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.alloc_pd = rvt_alloc_pd,
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.alloc_ucontext = rvt_alloc_ucontext,
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.attach_mcast = rvt_attach_mcast,
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.create_ah = rvt_create_ah,
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.create_cq = rvt_create_cq,
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.create_qp = rvt_create_qp,
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.create_srq = rvt_create_srq,
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.create_user_ah = rvt_create_ah,
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.dealloc_pd = rvt_dealloc_pd,
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.dealloc_ucontext = rvt_dealloc_ucontext,
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.dereg_mr = rvt_dereg_mr,
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.destroy_ah = rvt_destroy_ah,
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.destroy_cq = rvt_destroy_cq,
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.destroy_qp = rvt_destroy_qp,
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.destroy_srq = rvt_destroy_srq,
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.detach_mcast = rvt_detach_mcast,
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.get_dma_mr = rvt_get_dma_mr,
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.get_numa_node = rvt_get_numa_node,
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.get_port_immutable = rvt_get_port_immutable,
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.map_mr_sg = rvt_map_mr_sg,
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.mmap = rvt_mmap,
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.modify_ah = rvt_modify_ah,
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.modify_device = rvt_modify_device,
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.modify_port = rvt_modify_port,
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.modify_qp = rvt_modify_qp,
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.modify_srq = rvt_modify_srq,
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.poll_cq = rvt_poll_cq,
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.post_recv = rvt_post_recv,
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.post_send = rvt_post_send,
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.post_srq_recv = rvt_post_srq_recv,
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.query_ah = rvt_query_ah,
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.query_device = rvt_query_device,
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.query_gid = rvt_query_gid,
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.query_pkey = rvt_query_pkey,
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.query_port = rvt_query_port,
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.query_qp = rvt_query_qp,
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.query_srq = rvt_query_srq,
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.reg_user_mr = rvt_reg_user_mr,
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.req_notify_cq = rvt_req_notify_cq,
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.resize_cq = rvt_resize_cq,
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INIT_RDMA_OBJ_SIZE(ib_ah, rvt_ah, ibah),
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INIT_RDMA_OBJ_SIZE(ib_cq, rvt_cq, ibcq),
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INIT_RDMA_OBJ_SIZE(ib_pd, rvt_pd, ibpd),
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INIT_RDMA_OBJ_SIZE(ib_qp, rvt_qp, ibqp),
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INIT_RDMA_OBJ_SIZE(ib_srq, rvt_srq, ibsrq),
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INIT_RDMA_OBJ_SIZE(ib_ucontext, rvt_ucontext, ibucontext),
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};
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static noinline int check_support(struct rvt_dev_info *rdi, int verb)
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{
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switch (verb) {
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case MISC:
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/*
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* These functions are not part of verbs specifically but are
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* required for rdmavt to function.
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*/
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if ((!rdi->ibdev.ops.port_groups) ||
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(!rdi->driver_f.get_pci_dev))
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return -EINVAL;
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break;
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case MODIFY_DEVICE:
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/*
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* rdmavt does not support modify device currently drivers must
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* provide.
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*/
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if (!rdi->ibdev.ops.modify_device)
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return -EOPNOTSUPP;
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break;
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case QUERY_PORT:
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if (!rdi->ibdev.ops.query_port)
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if (!rdi->driver_f.query_port_state)
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return -EINVAL;
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break;
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case MODIFY_PORT:
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if (!rdi->ibdev.ops.modify_port)
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if (!rdi->driver_f.cap_mask_chg ||
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!rdi->driver_f.shut_down_port)
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return -EINVAL;
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break;
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case QUERY_GID:
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if (!rdi->ibdev.ops.query_gid)
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if (!rdi->driver_f.get_guid_be)
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return -EINVAL;
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break;
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case CREATE_QP:
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if (!rdi->ibdev.ops.create_qp)
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if (!rdi->driver_f.qp_priv_alloc ||
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!rdi->driver_f.qp_priv_free ||
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!rdi->driver_f.notify_qp_reset ||
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!rdi->driver_f.flush_qp_waiters ||
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!rdi->driver_f.stop_send_queue ||
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!rdi->driver_f.quiesce_qp)
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return -EINVAL;
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break;
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case MODIFY_QP:
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if (!rdi->ibdev.ops.modify_qp)
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if (!rdi->driver_f.notify_qp_reset ||
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!rdi->driver_f.schedule_send ||
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!rdi->driver_f.get_pmtu_from_attr ||
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!rdi->driver_f.flush_qp_waiters ||
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!rdi->driver_f.stop_send_queue ||
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!rdi->driver_f.quiesce_qp ||
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!rdi->driver_f.notify_error_qp ||
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!rdi->driver_f.mtu_from_qp ||
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!rdi->driver_f.mtu_to_path_mtu)
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return -EINVAL;
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break;
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case DESTROY_QP:
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if (!rdi->ibdev.ops.destroy_qp)
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if (!rdi->driver_f.qp_priv_free ||
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!rdi->driver_f.notify_qp_reset ||
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!rdi->driver_f.flush_qp_waiters ||
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!rdi->driver_f.stop_send_queue ||
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!rdi->driver_f.quiesce_qp)
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return -EINVAL;
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break;
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case POST_SEND:
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if (!rdi->ibdev.ops.post_send)
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if (!rdi->driver_f.schedule_send ||
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!rdi->driver_f.do_send ||
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!rdi->post_parms)
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return -EINVAL;
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break;
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}
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return 0;
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}
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/**
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* rvt_register_device - register a driver
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* @rdi: main dev structure for all of rdmavt operations
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*
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* It is up to drivers to allocate the rdi and fill in the appropriate
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* information.
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*
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* Return: 0 on success otherwise an errno.
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*/
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int rvt_register_device(struct rvt_dev_info *rdi)
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{
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int ret = 0, i;
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if (!rdi)
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return -EINVAL;
|
|
|
|
/*
|
|
* Check to ensure drivers have setup the required helpers for the verbs
|
|
* they want rdmavt to handle
|
|
*/
|
|
for (i = 0; i < _VERB_IDX_MAX; i++)
|
|
if (check_support(rdi, i)) {
|
|
pr_err("Driver support req not met at %d\n", i);
|
|
return -EINVAL;
|
|
}
|
|
|
|
ib_set_device_ops(&rdi->ibdev, &rvt_dev_ops);
|
|
|
|
/* Once we get past here we can use rvt_pr macros and tracepoints */
|
|
trace_rvt_dbg(rdi, "Driver attempting registration");
|
|
rvt_mmap_init(rdi);
|
|
|
|
/* Queue Pairs */
|
|
ret = rvt_driver_qp_init(rdi);
|
|
if (ret) {
|
|
pr_err("Error in driver QP init.\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Address Handle */
|
|
spin_lock_init(&rdi->n_ahs_lock);
|
|
rdi->n_ahs_allocated = 0;
|
|
|
|
/* Shared Receive Queue */
|
|
rvt_driver_srq_init(rdi);
|
|
|
|
/* Multicast */
|
|
rvt_driver_mcast_init(rdi);
|
|
|
|
/* Mem Region */
|
|
ret = rvt_driver_mr_init(rdi);
|
|
if (ret) {
|
|
pr_err("Error in driver MR init.\n");
|
|
goto bail_no_mr;
|
|
}
|
|
|
|
/* Memory Working Set Size */
|
|
ret = rvt_wss_init(rdi);
|
|
if (ret) {
|
|
rvt_pr_err(rdi, "Error in WSS init.\n");
|
|
goto bail_mr;
|
|
}
|
|
|
|
/* Completion queues */
|
|
spin_lock_init(&rdi->n_cqs_lock);
|
|
|
|
/* Protection Domain */
|
|
spin_lock_init(&rdi->n_pds_lock);
|
|
rdi->n_pds_allocated = 0;
|
|
|
|
/*
|
|
* There are some things which could be set by underlying drivers but
|
|
* really should be up to rdmavt to set. For instance drivers can't know
|
|
* exactly which functions rdmavt supports, nor do they know the ABI
|
|
* version, so we do all of this sort of stuff here.
|
|
*/
|
|
rdi->ibdev.uverbs_cmd_mask |=
|
|
(1ull << IB_USER_VERBS_CMD_POLL_CQ) |
|
|
(1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ) |
|
|
(1ull << IB_USER_VERBS_CMD_POST_SEND) |
|
|
(1ull << IB_USER_VERBS_CMD_POST_RECV) |
|
|
(1ull << IB_USER_VERBS_CMD_POST_SRQ_RECV);
|
|
rdi->ibdev.node_type = RDMA_NODE_IB_CA;
|
|
if (!rdi->ibdev.num_comp_vectors)
|
|
rdi->ibdev.num_comp_vectors = 1;
|
|
|
|
/* We are now good to announce we exist */
|
|
ret = ib_register_device(&rdi->ibdev, dev_name(&rdi->ibdev.dev), NULL);
|
|
if (ret) {
|
|
rvt_pr_err(rdi, "Failed to register driver with ib core.\n");
|
|
goto bail_wss;
|
|
}
|
|
|
|
rvt_create_mad_agents(rdi);
|
|
|
|
rvt_pr_info(rdi, "Registration with rdmavt done.\n");
|
|
return ret;
|
|
|
|
bail_wss:
|
|
rvt_wss_exit(rdi);
|
|
bail_mr:
|
|
rvt_mr_exit(rdi);
|
|
|
|
bail_no_mr:
|
|
rvt_qp_exit(rdi);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(rvt_register_device);
|
|
|
|
/**
|
|
* rvt_unregister_device - remove a driver
|
|
* @rdi: rvt dev struct
|
|
*/
|
|
void rvt_unregister_device(struct rvt_dev_info *rdi)
|
|
{
|
|
trace_rvt_dbg(rdi, "Driver is unregistering.");
|
|
if (!rdi)
|
|
return;
|
|
|
|
rvt_free_mad_agents(rdi);
|
|
|
|
ib_unregister_device(&rdi->ibdev);
|
|
rvt_wss_exit(rdi);
|
|
rvt_mr_exit(rdi);
|
|
rvt_qp_exit(rdi);
|
|
}
|
|
EXPORT_SYMBOL(rvt_unregister_device);
|
|
|
|
/**
|
|
* rvt_init_port - init internal data for driver port
|
|
* @rdi: rvt_dev_info struct
|
|
* @port: rvt port
|
|
* @port_index: 0 based index of ports, different from IB core port num
|
|
* @pkey_table: pkey_table for @port
|
|
*
|
|
* Keep track of a list of ports. No need to have a detach port.
|
|
* They persist until the driver goes away.
|
|
*
|
|
* Return: always 0
|
|
*/
|
|
int rvt_init_port(struct rvt_dev_info *rdi, struct rvt_ibport *port,
|
|
int port_index, u16 *pkey_table)
|
|
{
|
|
|
|
rdi->ports[port_index] = port;
|
|
rdi->ports[port_index]->pkey_table = pkey_table;
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(rvt_init_port);
|