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