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), 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;
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/*
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* Check to ensure drivers have setup the required helpers for the verbs
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* they want rdmavt to handle
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*/
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for (i = 0; i < _VERB_IDX_MAX; i++)
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if (check_support(rdi, i)) {
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pr_err("Driver support req not met at %d\n", i);
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return -EINVAL;
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}
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ib_set_device_ops(&rdi->ibdev, &rvt_dev_ops);
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/* Once we get past here we can use rvt_pr macros and tracepoints */
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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);
|