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// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
/*
* Copyright (c) 2018, Mellanox Technologies inc. All rights reserved.
*/
#include <rdma/uverbs_std_types.h>
#include "rdma_core.h"
#include "uverbs.h"
#include <rdma/uverbs_ioctl.h>
#include <rdma/opa_addr.h>
/*
* This ioctl method allows calling any defined write or write_ex
* handler. This essentially replaces the hdr/ex_hdr system with the ioctl
* marshalling, and brings the non-ex path into the same marshalling as the ex
* path.
*/
static int UVERBS_HANDLER(UVERBS_METHOD_INVOKE_WRITE)(
struct uverbs_attr_bundle *attrs)
{
struct uverbs_api *uapi = attrs->ufile->device->uapi;
const struct uverbs_api_write_method *method_elm;
u32 cmd;
int rc;
rc = uverbs_get_const(&cmd, attrs, UVERBS_ATTR_WRITE_CMD);
if (rc)
return rc;
method_elm = uapi_get_method(uapi, cmd);
if (IS_ERR(method_elm))
return PTR_ERR(method_elm);
uverbs_fill_udata(attrs, &attrs->ucore, UVERBS_ATTR_CORE_IN,
UVERBS_ATTR_CORE_OUT);
if (attrs->ucore.inlen < method_elm->req_size ||
attrs->ucore.outlen < method_elm->resp_size)
return -ENOSPC;
return method_elm->handler(attrs);
}
DECLARE_UVERBS_NAMED_METHOD(UVERBS_METHOD_INVOKE_WRITE,
UVERBS_ATTR_CONST_IN(UVERBS_ATTR_WRITE_CMD,
enum ib_uverbs_write_cmds,
UA_MANDATORY),
UVERBS_ATTR_PTR_IN(UVERBS_ATTR_CORE_IN,
UVERBS_ATTR_MIN_SIZE(sizeof(u32)),
UA_OPTIONAL),
UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_CORE_OUT,
UVERBS_ATTR_MIN_SIZE(0),
UA_OPTIONAL),
UVERBS_ATTR_UHW());
static uint32_t *
gather_objects_handle(struct ib_uverbs_file *ufile,
const struct uverbs_api_object *uapi_object,
struct uverbs_attr_bundle *attrs,
ssize_t out_len,
u64 *total)
{
u64 max_count = out_len / sizeof(u32);
struct ib_uobject *obj;
u64 count = 0;
u32 *handles;
/* Allocated memory that cannot page out where we gather
* all object ids under a spin_lock.
*/
handles = uverbs_zalloc(attrs, out_len);
if (IS_ERR(handles))
return handles;
spin_lock_irq(&ufile->uobjects_lock);
list_for_each_entry(obj, &ufile->uobjects, list) {
u32 obj_id = obj->id;
if (obj->uapi_object != uapi_object)
continue;
if (count >= max_count)
break;
handles[count] = obj_id;
count++;
}
spin_unlock_irq(&ufile->uobjects_lock);
*total = count;
return handles;
}
static int UVERBS_HANDLER(UVERBS_METHOD_INFO_HANDLES)(
struct uverbs_attr_bundle *attrs)
{
const struct uverbs_api_object *uapi_object;
ssize_t out_len;
u64 total = 0;
u16 object_id;
u32 *handles;
int ret;
out_len = uverbs_attr_get_len(attrs, UVERBS_ATTR_INFO_HANDLES_LIST);
if (out_len <= 0 || (out_len % sizeof(u32) != 0))
return -EINVAL;
ret = uverbs_get_const(&object_id, attrs, UVERBS_ATTR_INFO_OBJECT_ID);
if (ret)
return ret;
uapi_object = uapi_get_object(attrs->ufile->device->uapi, object_id);
if (!uapi_object)
return -EINVAL;
handles = gather_objects_handle(attrs->ufile, uapi_object, attrs,
out_len, &total);
if (IS_ERR(handles))
return PTR_ERR(handles);
ret = uverbs_copy_to(attrs, UVERBS_ATTR_INFO_HANDLES_LIST, handles,
sizeof(u32) * total);
if (ret)
goto err;
ret = uverbs_copy_to(attrs, UVERBS_ATTR_INFO_TOTAL_HANDLES, &total,
sizeof(total));
err:
return ret;
}
void copy_port_attr_to_resp(struct ib_port_attr *attr,
struct ib_uverbs_query_port_resp *resp,
struct ib_device *ib_dev, u8 port_num)
{
resp->state = attr->state;
resp->max_mtu = attr->max_mtu;
resp->active_mtu = attr->active_mtu;
resp->gid_tbl_len = attr->gid_tbl_len;
resp->port_cap_flags = make_port_cap_flags(attr);
resp->max_msg_sz = attr->max_msg_sz;
resp->bad_pkey_cntr = attr->bad_pkey_cntr;
resp->qkey_viol_cntr = attr->qkey_viol_cntr;
resp->pkey_tbl_len = attr->pkey_tbl_len;
if (rdma_is_grh_required(ib_dev, port_num))
resp->flags |= IB_UVERBS_QPF_GRH_REQUIRED;
if (rdma_cap_opa_ah(ib_dev, port_num)) {
resp->lid = OPA_TO_IB_UCAST_LID(attr->lid);
resp->sm_lid = OPA_TO_IB_UCAST_LID(attr->sm_lid);
} else {
resp->lid = ib_lid_cpu16(attr->lid);
resp->sm_lid = ib_lid_cpu16(attr->sm_lid);
}
resp->lmc = attr->lmc;
resp->max_vl_num = attr->max_vl_num;
resp->sm_sl = attr->sm_sl;
resp->subnet_timeout = attr->subnet_timeout;
resp->init_type_reply = attr->init_type_reply;
resp->active_width = attr->active_width;
resp->active_speed = attr->active_speed;
resp->phys_state = attr->phys_state;
resp->link_layer = rdma_port_get_link_layer(ib_dev, port_num);
}
static int UVERBS_HANDLER(UVERBS_METHOD_QUERY_PORT)(
struct uverbs_attr_bundle *attrs)
{
struct ib_device *ib_dev = attrs->ufile->device->ib_dev;
struct ib_port_attr attr = {};
struct ib_uverbs_query_port_resp_ex resp = {};
int ret;
u8 port_num;
/* FIXME: Extend the UAPI_DEF_OBJ_NEEDS_FN stuff.. */
if (!ib_dev->ops.query_port)
return -EOPNOTSUPP;
ret = uverbs_get_const(&port_num, attrs,
UVERBS_ATTR_QUERY_PORT_PORT_NUM);
if (ret)
return ret;
ret = ib_query_port(ib_dev, port_num, &attr);
if (ret)
return ret;
copy_port_attr_to_resp(&attr, &resp.legacy_resp, ib_dev, port_num);
resp.port_cap_flags2 = attr.port_cap_flags2;
return uverbs_copy_to_struct_or_zero(attrs, UVERBS_ATTR_QUERY_PORT_RESP,
&resp, sizeof(resp));
}
DECLARE_UVERBS_NAMED_METHOD(
UVERBS_METHOD_INFO_HANDLES,
/* Also includes any device specific object ids */
UVERBS_ATTR_CONST_IN(UVERBS_ATTR_INFO_OBJECT_ID,
enum uverbs_default_objects, UA_MANDATORY),
UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_INFO_TOTAL_HANDLES,
UVERBS_ATTR_TYPE(u32), UA_OPTIONAL),
UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_INFO_HANDLES_LIST,
UVERBS_ATTR_MIN_SIZE(sizeof(u32)), UA_OPTIONAL));
DECLARE_UVERBS_NAMED_METHOD(
UVERBS_METHOD_QUERY_PORT,
UVERBS_ATTR_CONST_IN(UVERBS_ATTR_QUERY_PORT_PORT_NUM, u8, UA_MANDATORY),
UVERBS_ATTR_PTR_OUT(
UVERBS_ATTR_QUERY_PORT_RESP,
UVERBS_ATTR_STRUCT(struct ib_uverbs_query_port_resp_ex,
reserved),
UA_MANDATORY));
DECLARE_UVERBS_GLOBAL_METHODS(UVERBS_OBJECT_DEVICE,
&UVERBS_METHOD(UVERBS_METHOD_INVOKE_WRITE),
&UVERBS_METHOD(UVERBS_METHOD_INFO_HANDLES),
&UVERBS_METHOD(UVERBS_METHOD_QUERY_PORT));
const struct uapi_definition uverbs_def_obj_device[] = {
UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_DEVICE),
{},
};
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