linux-zen-server/drivers/infiniband/sw/rdmavt/vt.c

620 lines
15 KiB
C

// SPDX-License-Identifier: GPL-2.0 or BSD-3-Clause
/*
* Copyright(c) 2016 - 2018 Intel Corporation.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/dma-mapping.h>
#include "vt.h"
#include "cq.h"
#include "trace.h"
#define RVT_UVERBS_ABI_VERSION 2
MODULE_LICENSE("Dual BSD/GPL");
MODULE_DESCRIPTION("RDMA Verbs Transport Library");
static int __init rvt_init(void)
{
int ret = rvt_driver_cq_init();
if (ret)
pr_err("Error in driver CQ init.\n");
return ret;
}
module_init(rvt_init);
static void __exit rvt_cleanup(void)
{
rvt_cq_exit();
}
module_exit(rvt_cleanup);
/**
* rvt_alloc_device - allocate rdi
* @size: how big of a structure to allocate
* @nports: number of ports to allocate array slots for
*
* Use IB core device alloc to allocate space for the rdi which is assumed to be
* inside of the ib_device. Any extra space that drivers require should be
* included in size.
*
* We also allocate a port array based on the number of ports.
*
* Return: pointer to allocated rdi
*/
struct rvt_dev_info *rvt_alloc_device(size_t size, int nports)
{
struct rvt_dev_info *rdi;
rdi = container_of(_ib_alloc_device(size), struct rvt_dev_info, ibdev);
if (!rdi)
return rdi;
rdi->ports = kcalloc(nports, sizeof(*rdi->ports), GFP_KERNEL);
if (!rdi->ports)
ib_dealloc_device(&rdi->ibdev);
return rdi;
}
EXPORT_SYMBOL(rvt_alloc_device);
/**
* rvt_dealloc_device - deallocate rdi
* @rdi: structure to free
*
* Free a structure allocated with rvt_alloc_device()
*/
void rvt_dealloc_device(struct rvt_dev_info *rdi)
{
kfree(rdi->ports);
ib_dealloc_device(&rdi->ibdev);
}
EXPORT_SYMBOL(rvt_dealloc_device);
static int rvt_query_device(struct ib_device *ibdev,
struct ib_device_attr *props,
struct ib_udata *uhw)
{
struct rvt_dev_info *rdi = ib_to_rvt(ibdev);
if (uhw->inlen || uhw->outlen)
return -EINVAL;
/*
* Return rvt_dev_info.dparms.props contents
*/
*props = rdi->dparms.props;
return 0;
}
static int rvt_get_numa_node(struct ib_device *ibdev)
{
struct rvt_dev_info *rdi = ib_to_rvt(ibdev);
return rdi->dparms.node;
}
static int rvt_modify_device(struct ib_device *device,
int device_modify_mask,
struct ib_device_modify *device_modify)
{
/*
* There is currently no need to supply this based on qib and hfi1.
* Future drivers may need to implement this though.
*/
return -EOPNOTSUPP;
}
/**
* rvt_query_port - Passes the query port call to the driver
* @ibdev: Verbs IB dev
* @port_num: port number, 1 based from ib core
* @props: structure to hold returned properties
*
* Return: 0 on success
*/
static int rvt_query_port(struct ib_device *ibdev, u32 port_num,
struct ib_port_attr *props)
{
struct rvt_dev_info *rdi = ib_to_rvt(ibdev);
struct rvt_ibport *rvp;
u32 port_index = ibport_num_to_idx(ibdev, port_num);
rvp = rdi->ports[port_index];
/* props being zeroed by the caller, avoid zeroing it here */
props->sm_lid = rvp->sm_lid;
props->sm_sl = rvp->sm_sl;
props->port_cap_flags = rvp->port_cap_flags;
props->max_msg_sz = 0x80000000;
props->pkey_tbl_len = rvt_get_npkeys(rdi);
props->bad_pkey_cntr = rvp->pkey_violations;
props->qkey_viol_cntr = rvp->qkey_violations;
props->subnet_timeout = rvp->subnet_timeout;
props->init_type_reply = 0;
/* Populate the remaining ib_port_attr elements */
return rdi->driver_f.query_port_state(rdi, port_num, props);
}
/**
* rvt_modify_port - modify port
* @ibdev: Verbs IB dev
* @port_num: Port number, 1 based from ib core
* @port_modify_mask: How to change the port
* @props: Structure to fill in
*
* Return: 0 on success
*/
static int rvt_modify_port(struct ib_device *ibdev, u32 port_num,
int port_modify_mask, struct ib_port_modify *props)
{
struct rvt_dev_info *rdi = ib_to_rvt(ibdev);
struct rvt_ibport *rvp;
int ret = 0;
u32 port_index = ibport_num_to_idx(ibdev, port_num);
rvp = rdi->ports[port_index];
if (port_modify_mask & IB_PORT_OPA_MASK_CHG) {
rvp->port_cap3_flags |= props->set_port_cap_mask;
rvp->port_cap3_flags &= ~props->clr_port_cap_mask;
} else {
rvp->port_cap_flags |= props->set_port_cap_mask;
rvp->port_cap_flags &= ~props->clr_port_cap_mask;
}
if (props->set_port_cap_mask || props->clr_port_cap_mask)
rdi->driver_f.cap_mask_chg(rdi, port_num);
if (port_modify_mask & IB_PORT_SHUTDOWN)
ret = rdi->driver_f.shut_down_port(rdi, port_num);
if (port_modify_mask & IB_PORT_RESET_QKEY_CNTR)
rvp->qkey_violations = 0;
return ret;
}
/**
* rvt_query_pkey - Return a pkey from the table at a given index
* @ibdev: Verbs IB dev
* @port_num: Port number, 1 based from ib core
* @index: Index into pkey table
* @pkey: returned pkey from the port pkey table
*
* Return: 0 on failure pkey otherwise
*/
static int rvt_query_pkey(struct ib_device *ibdev, u32 port_num, u16 index,
u16 *pkey)
{
/*
* Driver will be responsible for keeping rvt_dev_info.pkey_table up to
* date. This function will just return that value. There is no need to
* lock, if a stale value is read and sent to the user so be it there is
* no way to protect against that anyway.
*/
struct rvt_dev_info *rdi = ib_to_rvt(ibdev);
u32 port_index;
port_index = ibport_num_to_idx(ibdev, port_num);
if (index >= rvt_get_npkeys(rdi))
return -EINVAL;
*pkey = rvt_get_pkey(rdi, port_index, index);
return 0;
}
/**
* rvt_query_gid - Return a gid from the table
* @ibdev: Verbs IB dev
* @port_num: Port number, 1 based from ib core
* @guid_index: Index in table
* @gid: Gid to return
*
* Return: 0 on success
*/
static int rvt_query_gid(struct ib_device *ibdev, u32 port_num,
int guid_index, union ib_gid *gid)
{
struct rvt_dev_info *rdi;
struct rvt_ibport *rvp;
u32 port_index;
/*
* Driver is responsible for updating the guid table. Which will be used
* to craft the return value. This will work similar to how query_pkey()
* is being done.
*/
port_index = ibport_num_to_idx(ibdev, port_num);
rdi = ib_to_rvt(ibdev);
rvp = rdi->ports[port_index];
gid->global.subnet_prefix = rvp->gid_prefix;
return rdi->driver_f.get_guid_be(rdi, rvp, guid_index,
&gid->global.interface_id);
}
/**
* rvt_alloc_ucontext - Allocate a user context
* @uctx: Verbs context
* @udata: User data allocated
*/
static int rvt_alloc_ucontext(struct ib_ucontext *uctx, struct ib_udata *udata)
{
return 0;
}
/**
* rvt_dealloc_ucontext - Free a user context
* @context: Unused
*/
static void rvt_dealloc_ucontext(struct ib_ucontext *context)
{
return;
}
static int rvt_get_port_immutable(struct ib_device *ibdev, u32 port_num,
struct ib_port_immutable *immutable)
{
struct rvt_dev_info *rdi = ib_to_rvt(ibdev);
struct ib_port_attr attr;
int err;
immutable->core_cap_flags = rdi->dparms.core_cap_flags;
err = ib_query_port(ibdev, port_num, &attr);
if (err)
return err;
immutable->pkey_tbl_len = attr.pkey_tbl_len;
immutable->gid_tbl_len = attr.gid_tbl_len;
immutable->max_mad_size = rdi->dparms.max_mad_size;
return 0;
}
enum {
MISC,
QUERY_DEVICE,
MODIFY_DEVICE,
QUERY_PORT,
MODIFY_PORT,
QUERY_PKEY,
QUERY_GID,
ALLOC_UCONTEXT,
DEALLOC_UCONTEXT,
GET_PORT_IMMUTABLE,
CREATE_QP,
MODIFY_QP,
DESTROY_QP,
QUERY_QP,
POST_SEND,
POST_RECV,
POST_SRQ_RECV,
CREATE_AH,
DESTROY_AH,
MODIFY_AH,
QUERY_AH,
CREATE_SRQ,
MODIFY_SRQ,
DESTROY_SRQ,
QUERY_SRQ,
ATTACH_MCAST,
DETACH_MCAST,
GET_DMA_MR,
REG_USER_MR,
DEREG_MR,
ALLOC_MR,
MAP_MR_SG,
ALLOC_FMR,
MAP_PHYS_FMR,
UNMAP_FMR,
DEALLOC_FMR,
MMAP,
CREATE_CQ,
DESTROY_CQ,
POLL_CQ,
REQ_NOTFIY_CQ,
RESIZE_CQ,
ALLOC_PD,
DEALLOC_PD,
_VERB_IDX_MAX /* Must always be last! */
};
static const struct ib_device_ops rvt_dev_ops = {
.uverbs_abi_ver = RVT_UVERBS_ABI_VERSION,
.alloc_mr = rvt_alloc_mr,
.alloc_pd = rvt_alloc_pd,
.alloc_ucontext = rvt_alloc_ucontext,
.attach_mcast = rvt_attach_mcast,
.create_ah = rvt_create_ah,
.create_cq = rvt_create_cq,
.create_qp = rvt_create_qp,
.create_srq = rvt_create_srq,
.create_user_ah = rvt_create_ah,
.dealloc_pd = rvt_dealloc_pd,
.dealloc_ucontext = rvt_dealloc_ucontext,
.dereg_mr = rvt_dereg_mr,
.destroy_ah = rvt_destroy_ah,
.destroy_cq = rvt_destroy_cq,
.destroy_qp = rvt_destroy_qp,
.destroy_srq = rvt_destroy_srq,
.detach_mcast = rvt_detach_mcast,
.get_dma_mr = rvt_get_dma_mr,
.get_numa_node = rvt_get_numa_node,
.get_port_immutable = rvt_get_port_immutable,
.map_mr_sg = rvt_map_mr_sg,
.mmap = rvt_mmap,
.modify_ah = rvt_modify_ah,
.modify_device = rvt_modify_device,
.modify_port = rvt_modify_port,
.modify_qp = rvt_modify_qp,
.modify_srq = rvt_modify_srq,
.poll_cq = rvt_poll_cq,
.post_recv = rvt_post_recv,
.post_send = rvt_post_send,
.post_srq_recv = rvt_post_srq_recv,
.query_ah = rvt_query_ah,
.query_device = rvt_query_device,
.query_gid = rvt_query_gid,
.query_pkey = rvt_query_pkey,
.query_port = rvt_query_port,
.query_qp = rvt_query_qp,
.query_srq = rvt_query_srq,
.reg_user_mr = rvt_reg_user_mr,
.req_notify_cq = rvt_req_notify_cq,
.resize_cq = rvt_resize_cq,
INIT_RDMA_OBJ_SIZE(ib_ah, rvt_ah, ibah),
INIT_RDMA_OBJ_SIZE(ib_cq, rvt_cq, ibcq),
INIT_RDMA_OBJ_SIZE(ib_pd, rvt_pd, ibpd),
INIT_RDMA_OBJ_SIZE(ib_qp, rvt_qp, ibqp),
INIT_RDMA_OBJ_SIZE(ib_srq, rvt_srq, ibsrq),
INIT_RDMA_OBJ_SIZE(ib_ucontext, rvt_ucontext, ibucontext),
};
static noinline int check_support(struct rvt_dev_info *rdi, int verb)
{
switch (verb) {
case MISC:
/*
* These functions are not part of verbs specifically but are
* required for rdmavt to function.
*/
if ((!rdi->ibdev.ops.port_groups) ||
(!rdi->driver_f.get_pci_dev))
return -EINVAL;
break;
case MODIFY_DEVICE:
/*
* rdmavt does not support modify device currently drivers must
* provide.
*/
if (!rdi->ibdev.ops.modify_device)
return -EOPNOTSUPP;
break;
case QUERY_PORT:
if (!rdi->ibdev.ops.query_port)
if (!rdi->driver_f.query_port_state)
return -EINVAL;
break;
case MODIFY_PORT:
if (!rdi->ibdev.ops.modify_port)
if (!rdi->driver_f.cap_mask_chg ||
!rdi->driver_f.shut_down_port)
return -EINVAL;
break;
case QUERY_GID:
if (!rdi->ibdev.ops.query_gid)
if (!rdi->driver_f.get_guid_be)
return -EINVAL;
break;
case CREATE_QP:
if (!rdi->ibdev.ops.create_qp)
if (!rdi->driver_f.qp_priv_alloc ||
!rdi->driver_f.qp_priv_free ||
!rdi->driver_f.notify_qp_reset ||
!rdi->driver_f.flush_qp_waiters ||
!rdi->driver_f.stop_send_queue ||
!rdi->driver_f.quiesce_qp)
return -EINVAL;
break;
case MODIFY_QP:
if (!rdi->ibdev.ops.modify_qp)
if (!rdi->driver_f.notify_qp_reset ||
!rdi->driver_f.schedule_send ||
!rdi->driver_f.get_pmtu_from_attr ||
!rdi->driver_f.flush_qp_waiters ||
!rdi->driver_f.stop_send_queue ||
!rdi->driver_f.quiesce_qp ||
!rdi->driver_f.notify_error_qp ||
!rdi->driver_f.mtu_from_qp ||
!rdi->driver_f.mtu_to_path_mtu)
return -EINVAL;
break;
case DESTROY_QP:
if (!rdi->ibdev.ops.destroy_qp)
if (!rdi->driver_f.qp_priv_free ||
!rdi->driver_f.notify_qp_reset ||
!rdi->driver_f.flush_qp_waiters ||
!rdi->driver_f.stop_send_queue ||
!rdi->driver_f.quiesce_qp)
return -EINVAL;
break;
case POST_SEND:
if (!rdi->ibdev.ops.post_send)
if (!rdi->driver_f.schedule_send ||
!rdi->driver_f.do_send ||
!rdi->post_parms)
return -EINVAL;
break;
}
return 0;
}
/**
* rvt_register_device - register a driver
* @rdi: main dev structure for all of rdmavt operations
*
* It is up to drivers to allocate the rdi and fill in the appropriate
* information.
*
* Return: 0 on success otherwise an errno.
*/
int rvt_register_device(struct rvt_dev_info *rdi)
{
int ret = 0, i;
if (!rdi)
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);