drivers/infiniband/core/uverbs_std_types_device.c

   1 // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
   2 /*
   3  * Copyright (c) 2018, Mellanox Technologies inc.  All rights reserved.
   4  */
   5
   6 #include <rdma/uverbs_std_types.h>
   7 #include "rdma_core.h"
   8 #include "uverbs.h"
   9 #include <rdma/uverbs_ioctl.h>
  10 #include <rdma/opa_addr.h>
  11
  12 /*
  13  * This ioctl method allows calling any defined write or write_ex
  14  * handler. This essentially replaces the hdr/ex_hdr system with the ioctl
  15  * marshalling, and brings the non-ex path into the same marshalling as the ex
  16  * path.
  17  */
  18 static int UVERBS_HANDLER(UVERBS_METHOD_INVOKE_WRITE)(
  19         struct uverbs_attr_bundle *attrs)
  20 {
  21         struct uverbs_api *uapi = attrs->ufile->device->uapi;
  22         const struct uverbs_api_write_method *method_elm;
  23         u32 cmd;
  24         int rc;
  25
  26         rc = uverbs_get_const(&cmd, attrs, UVERBS_ATTR_WRITE_CMD);
  27         if (rc)
  28                 return rc;
  29
  30         method_elm = uapi_get_method(uapi, cmd);
  31         if (IS_ERR(method_elm))
  32                 return PTR_ERR(method_elm);
  33
  34         uverbs_fill_udata(attrs, &attrs->ucore, UVERBS_ATTR_CORE_IN,
  35                           UVERBS_ATTR_CORE_OUT);
  36
  37         if (attrs->ucore.inlen < method_elm->req_size ||
  38             attrs->ucore.outlen < method_elm->resp_size)
  39                 return -ENOSPC;
  40
  41         return method_elm->handler(attrs);
  42 }
  43
  44 DECLARE_UVERBS_NAMED_METHOD(UVERBS_METHOD_INVOKE_WRITE,
  45                             UVERBS_ATTR_CONST_IN(UVERBS_ATTR_WRITE_CMD,
  46                                                  enum ib_uverbs_write_cmds,
  47                                                  UA_MANDATORY),
  48                             UVERBS_ATTR_PTR_IN(UVERBS_ATTR_CORE_IN,
  49                                                UVERBS_ATTR_MIN_SIZE(sizeof(u32)),
  50                                                UA_OPTIONAL),
  51                             UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_CORE_OUT,
  52                                                 UVERBS_ATTR_MIN_SIZE(0),
  53                                                 UA_OPTIONAL),
  54                             UVERBS_ATTR_UHW());
  55
  56 static uint32_t *
  57 gather_objects_handle(struct ib_uverbs_file *ufile,
  58                       const struct uverbs_api_object *uapi_object,
  59                       struct uverbs_attr_bundle *attrs,
  60                       ssize_t out_len,
  61                       u64 *total)
  62 {
  63         u64 max_count = out_len / sizeof(u32);
  64         struct ib_uobject *obj;
  65         u64 count = 0;
  66         u32 *handles;
  67
  68         /* Allocated memory that cannot page out where we gather
  69          * all object ids under a spin_lock.
  70          */
  71         handles = uverbs_zalloc(attrs, out_len);
  72         if (IS_ERR(handles))
  73                 return handles;
  74
  75         spin_lock_irq(&ufile->uobjects_lock);
  76         list_for_each_entry(obj, &ufile->uobjects, list) {
  77                 u32 obj_id = obj->id;
  78
  79                 if (obj->uapi_object != uapi_object)
  80                         continue;
  81
  82                 if (count >= max_count)
  83                         break;
  84
  85                 handles[count] = obj_id;
  86                 count++;
  87         }
  88         spin_unlock_irq(&ufile->uobjects_lock);
  89
  90         *total = count;
  91         return handles;
  92 }
  93
  94 static int UVERBS_HANDLER(UVERBS_METHOD_INFO_HANDLES)(
  95         struct uverbs_attr_bundle *attrs)
  96 {
  97         const struct uverbs_api_object *uapi_object;
  98         ssize_t out_len;
  99         u64 total = 0;
 100         u16 object_id;
 101         u32 *handles;
 102         int ret;
 103
 104         out_len = uverbs_attr_get_len(attrs, UVERBS_ATTR_INFO_HANDLES_LIST);
 105         if (out_len <= 0 || (out_len % sizeof(u32) != 0))
 106                 return -EINVAL;
 107
 108         ret = uverbs_get_const(&object_id, attrs, UVERBS_ATTR_INFO_OBJECT_ID);
 109         if (ret)
 110                 return ret;
 111
 112         uapi_object = uapi_get_object(attrs->ufile->device->uapi, object_id);
 113         if (!uapi_object)
 114                 return -EINVAL;
 115
 116         handles = gather_objects_handle(attrs->ufile, uapi_object, attrs,
 117                                         out_len, &total);
 118         if (IS_ERR(handles))
 119                 return PTR_ERR(handles);
 120
 121         ret = uverbs_copy_to(attrs, UVERBS_ATTR_INFO_HANDLES_LIST, handles,
 122                              sizeof(u32) * total);
 123         if (ret)
 124                 goto err;
 125
 126         ret = uverbs_copy_to(attrs, UVERBS_ATTR_INFO_TOTAL_HANDLES, &total,
 127                              sizeof(total));
 128 err:
 129         return ret;
 130 }
 131
 132 void copy_port_attr_to_resp(struct ib_port_attr *attr,
 133                             struct ib_uverbs_query_port_resp *resp,
 134                             struct ib_device *ib_dev, u8 port_num)
 135 {
 136         resp->state = attr->state;
 137         resp->max_mtu = attr->max_mtu;
 138         resp->active_mtu = attr->active_mtu;
 139         resp->gid_tbl_len = attr->gid_tbl_len;
 140         resp->port_cap_flags = make_port_cap_flags(attr);
 141         resp->max_msg_sz = attr->max_msg_sz;
 142         resp->bad_pkey_cntr = attr->bad_pkey_cntr;
 143         resp->qkey_viol_cntr = attr->qkey_viol_cntr;
 144         resp->pkey_tbl_len = attr->pkey_tbl_len;
 145
 146         if (rdma_is_grh_required(ib_dev, port_num))
 147                 resp->flags |= IB_UVERBS_QPF_GRH_REQUIRED;
 148
 149         if (rdma_cap_opa_ah(ib_dev, port_num)) {
 150                 resp->lid = OPA_TO_IB_UCAST_LID(attr->lid);
 151                 resp->sm_lid = OPA_TO_IB_UCAST_LID(attr->sm_lid);
 152         } else {
 153                 resp->lid = ib_lid_cpu16(attr->lid);
 154                 resp->sm_lid = ib_lid_cpu16(attr->sm_lid);
 155         }
 156
 157         resp->lmc = attr->lmc;
 158         resp->max_vl_num = attr->max_vl_num;
 159         resp->sm_sl = attr->sm_sl;
 160         resp->subnet_timeout = attr->subnet_timeout;
 161         resp->init_type_reply = attr->init_type_reply;
 162         resp->active_width = attr->active_width;
 163         resp->active_speed = attr->active_speed;
 164         resp->phys_state = attr->phys_state;
 165         resp->link_layer = rdma_port_get_link_layer(ib_dev, port_num);
 166 }
 167
 168 static int UVERBS_HANDLER(UVERBS_METHOD_QUERY_PORT)(
 169         struct uverbs_attr_bundle *attrs)
 170 {
 171         struct ib_device *ib_dev = attrs->ufile->device->ib_dev;
 172         struct ib_port_attr attr = {};
 173         struct ib_uverbs_query_port_resp_ex resp = {};
 174         int ret;
 175         u8 port_num;
 176
 177         /* FIXME: Extend the UAPI_DEF_OBJ_NEEDS_FN stuff.. */
 178         if (!ib_dev->ops.query_port)
 179                 return -EOPNOTSUPP;
 180
 181         ret = uverbs_get_const(&port_num, attrs,
 182                                UVERBS_ATTR_QUERY_PORT_PORT_NUM);
 183         if (ret)
 184                 return ret;
 185
 186         ret = ib_query_port(ib_dev, port_num, &attr);
 187         if (ret)
 188                 return ret;
 189
 190         copy_port_attr_to_resp(&attr, &resp.legacy_resp, ib_dev, port_num);
 191         resp.port_cap_flags2 = attr.port_cap_flags2;
 192
 193         return uverbs_copy_to_struct_or_zero(attrs, UVERBS_ATTR_QUERY_PORT_RESP,
 194                                              &resp, sizeof(resp));
 195 }
 196
 197 DECLARE_UVERBS_NAMED_METHOD(
 198         UVERBS_METHOD_INFO_HANDLES,
 199         /* Also includes any device specific object ids */
 200         UVERBS_ATTR_CONST_IN(UVERBS_ATTR_INFO_OBJECT_ID,
 201                              enum uverbs_default_objects, UA_MANDATORY),
 202         UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_INFO_TOTAL_HANDLES,
 203                             UVERBS_ATTR_TYPE(u32), UA_OPTIONAL),
 204         UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_INFO_HANDLES_LIST,
 205                             UVERBS_ATTR_MIN_SIZE(sizeof(u32)), UA_OPTIONAL));
 206
 207 DECLARE_UVERBS_NAMED_METHOD(
 208         UVERBS_METHOD_QUERY_PORT,
 209         UVERBS_ATTR_CONST_IN(UVERBS_ATTR_QUERY_PORT_PORT_NUM, u8, UA_MANDATORY),
 210         UVERBS_ATTR_PTR_OUT(
 211                 UVERBS_ATTR_QUERY_PORT_RESP,
 212                 UVERBS_ATTR_STRUCT(struct ib_uverbs_query_port_resp_ex,
 213                                    reserved),
 214                 UA_MANDATORY));
 215
 216 DECLARE_UVERBS_GLOBAL_METHODS(UVERBS_OBJECT_DEVICE,
 217                               &UVERBS_METHOD(UVERBS_METHOD_INVOKE_WRITE),
 218                               &UVERBS_METHOD(UVERBS_METHOD_INFO_HANDLES),
 219                               &UVERBS_METHOD(UVERBS_METHOD_QUERY_PORT));
 220
 221 const struct uapi_definition uverbs_def_obj_device[] = {
 222         UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_DEVICE),
 223         {},
 224 };