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linux-sg2042/drivers/infiniband/hw/mlx5/devx.c

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// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
/*
* Copyright (c) 2018, Mellanox Technologies inc. All rights reserved.
*/
#include <rdma/ib_user_verbs.h>
#include <rdma/ib_verbs.h>
#include <rdma/uverbs_types.h>
#include <rdma/uverbs_ioctl.h>
#include <rdma/mlx5_user_ioctl_cmds.h>
#include <rdma/mlx5_user_ioctl_verbs.h>
#include <rdma/ib_umem.h>
#include <rdma/uverbs_std_types.h>
#include <linux/mlx5/driver.h>
#include <linux/mlx5/fs.h>
#include "mlx5_ib.h"
#include <linux/xarray.h>
#define UVERBS_MODULE_NAME mlx5_ib
#include <rdma/uverbs_named_ioctl.h>
static void dispatch_event_fd(struct list_head *fd_list, const void *data);
enum devx_obj_flags {
DEVX_OBJ_FLAGS_INDIRECT_MKEY = 1 << 0,
DEVX_OBJ_FLAGS_DCT = 1 << 1,
DEVX_OBJ_FLAGS_CQ = 1 << 2,
};
struct devx_async_data {
struct mlx5_ib_dev *mdev;
struct list_head list;
struct devx_async_cmd_event_file *ev_file;
struct mlx5_async_work cb_work;
u16 cmd_out_len;
/* must be last field in this structure */
struct mlx5_ib_uapi_devx_async_cmd_hdr hdr;
};
struct devx_async_event_data {
struct list_head list; /* headed in ev_file->event_list */
struct mlx5_ib_uapi_devx_async_event_hdr hdr;
};
/* first level XA value data structure */
struct devx_event {
struct xarray object_ids; /* second XA level, Key = object id */
struct list_head unaffiliated_list;
};
/* second level XA value data structure */
struct devx_obj_event {
struct rcu_head rcu;
struct list_head obj_sub_list;
};
struct devx_event_subscription {
struct list_head file_list; /* headed in ev_file->
* subscribed_events_list
*/
struct list_head xa_list; /* headed in devx_event->unaffiliated_list or
* devx_obj_event->obj_sub_list
*/
struct list_head obj_list; /* headed in devx_object */
struct list_head event_list; /* headed in ev_file->event_list or in
* temp list via subscription
*/
u8 is_cleaned:1;
u32 xa_key_level1;
u32 xa_key_level2;
struct rcu_head rcu;
u64 cookie;
struct devx_async_event_file *ev_file;
struct eventfd_ctx *eventfd;
};
struct devx_async_event_file {
struct ib_uobject uobj;
/* Head of events that are subscribed to this FD */
struct list_head subscribed_events_list;
spinlock_t lock;
wait_queue_head_t poll_wait;
struct list_head event_list;
struct mlx5_ib_dev *dev;
u8 omit_data:1;
u8 is_overflow_err:1;
u8 is_destroyed:1;
};
#define MLX5_MAX_DESTROY_INBOX_SIZE_DW MLX5_ST_SZ_DW(delete_fte_in)
struct devx_obj {
struct mlx5_ib_dev *ib_dev;
u64 obj_id;
u32 dinlen; /* destroy inbox length */
u32 dinbox[MLX5_MAX_DESTROY_INBOX_SIZE_DW];
u32 flags;
union {
struct mlx5_ib_devx_mr devx_mr;
struct mlx5_core_dct core_dct;
struct mlx5_core_cq core_cq;
u32 flow_counter_bulk_size;
};
struct list_head event_sub; /* holds devx_event_subscription entries */
};
struct devx_umem {
struct mlx5_core_dev *mdev;
struct ib_umem *umem;
u32 page_offset;
int page_shift;
int ncont;
u32 dinlen;
u32 dinbox[MLX5_ST_SZ_DW(general_obj_in_cmd_hdr)];
};
struct devx_umem_reg_cmd {
void *in;
u32 inlen;
u32 out[MLX5_ST_SZ_DW(general_obj_out_cmd_hdr)];
};
static struct mlx5_ib_ucontext *
devx_ufile2uctx(const struct uverbs_attr_bundle *attrs)
{
return to_mucontext(ib_uverbs_get_ucontext(attrs));
}
int mlx5_ib_devx_create(struct mlx5_ib_dev *dev, bool is_user)
{
u32 in[MLX5_ST_SZ_DW(create_uctx_in)] = {0};
u32 out[MLX5_ST_SZ_DW(general_obj_out_cmd_hdr)] = {0};
void *uctx;
int err;
u16 uid;
u32 cap = 0;
/* 0 means not supported */
if (!MLX5_CAP_GEN(dev->mdev, log_max_uctx))
return -EINVAL;
uctx = MLX5_ADDR_OF(create_uctx_in, in, uctx);
if (is_user && capable(CAP_NET_RAW) &&
(MLX5_CAP_GEN(dev->mdev, uctx_cap) & MLX5_UCTX_CAP_RAW_TX))
cap |= MLX5_UCTX_CAP_RAW_TX;
if (is_user && capable(CAP_SYS_RAWIO) &&
(MLX5_CAP_GEN(dev->mdev, uctx_cap) &
MLX5_UCTX_CAP_INTERNAL_DEV_RES))
cap |= MLX5_UCTX_CAP_INTERNAL_DEV_RES;
MLX5_SET(create_uctx_in, in, opcode, MLX5_CMD_OP_CREATE_UCTX);
MLX5_SET(uctx, uctx, cap, cap);
err = mlx5_cmd_exec(dev->mdev, in, sizeof(in), out, sizeof(out));
if (err)
return err;
uid = MLX5_GET(general_obj_out_cmd_hdr, out, obj_id);
return uid;
}
void mlx5_ib_devx_destroy(struct mlx5_ib_dev *dev, u16 uid)
{
u32 in[MLX5_ST_SZ_DW(destroy_uctx_in)] = {0};
u32 out[MLX5_ST_SZ_DW(general_obj_out_cmd_hdr)] = {0};
MLX5_SET(destroy_uctx_in, in, opcode, MLX5_CMD_OP_DESTROY_UCTX);
MLX5_SET(destroy_uctx_in, in, uid, uid);
mlx5_cmd_exec(dev->mdev, in, sizeof(in), out, sizeof(out));
}
bool mlx5_ib_devx_is_flow_dest(void *obj, int *dest_id, int *dest_type)
{
struct devx_obj *devx_obj = obj;
u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, devx_obj->dinbox, opcode);
switch (opcode) {
case MLX5_CMD_OP_DESTROY_TIR:
*dest_type = MLX5_FLOW_DESTINATION_TYPE_TIR;
*dest_id = MLX5_GET(general_obj_in_cmd_hdr, devx_obj->dinbox,
obj_id);
return true;
case MLX5_CMD_OP_DESTROY_FLOW_TABLE:
*dest_type = MLX5_FLOW_DESTINATION_TYPE_FLOW_TABLE;
*dest_id = MLX5_GET(destroy_flow_table_in, devx_obj->dinbox,
table_id);
return true;
default:
return false;
}
}
bool mlx5_ib_devx_is_flow_counter(void *obj, u32 offset, u32 *counter_id)
{
struct devx_obj *devx_obj = obj;
u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, devx_obj->dinbox, opcode);
if (opcode == MLX5_CMD_OP_DEALLOC_FLOW_COUNTER) {
if (offset && offset >= devx_obj->flow_counter_bulk_size)
return false;
*counter_id = MLX5_GET(dealloc_flow_counter_in,
devx_obj->dinbox,
flow_counter_id);
*counter_id += offset;
return true;
}
return false;
}
static bool is_legacy_unaffiliated_event_num(u16 event_num)
{
switch (event_num) {
case MLX5_EVENT_TYPE_PORT_CHANGE:
return true;
default:
return false;
}
}
static bool is_legacy_obj_event_num(u16 event_num)
{
switch (event_num) {
case MLX5_EVENT_TYPE_PATH_MIG:
case MLX5_EVENT_TYPE_COMM_EST:
case MLX5_EVENT_TYPE_SQ_DRAINED:
case MLX5_EVENT_TYPE_SRQ_LAST_WQE:
case MLX5_EVENT_TYPE_SRQ_RQ_LIMIT:
case MLX5_EVENT_TYPE_CQ_ERROR:
case MLX5_EVENT_TYPE_WQ_CATAS_ERROR:
case MLX5_EVENT_TYPE_PATH_MIG_FAILED:
case MLX5_EVENT_TYPE_WQ_INVAL_REQ_ERROR:
case MLX5_EVENT_TYPE_WQ_ACCESS_ERROR:
case MLX5_EVENT_TYPE_SRQ_CATAS_ERROR:
case MLX5_EVENT_TYPE_DCT_DRAINED:
case MLX5_EVENT_TYPE_COMP:
case MLX5_EVENT_TYPE_DCT_KEY_VIOLATION:
case MLX5_EVENT_TYPE_XRQ_ERROR:
return true;
default:
return false;
}
}
static u16 get_legacy_obj_type(u16 opcode)
{
switch (opcode) {
case MLX5_CMD_OP_CREATE_RQ:
return MLX5_EVENT_QUEUE_TYPE_RQ;
case MLX5_CMD_OP_CREATE_QP:
return MLX5_EVENT_QUEUE_TYPE_QP;
case MLX5_CMD_OP_CREATE_SQ:
return MLX5_EVENT_QUEUE_TYPE_SQ;
case MLX5_CMD_OP_CREATE_DCT:
return MLX5_EVENT_QUEUE_TYPE_DCT;
default:
return 0;
}
}
static u16 get_dec_obj_type(struct devx_obj *obj, u16 event_num)
{
u16 opcode;
opcode = (obj->obj_id >> 32) & 0xffff;
if (is_legacy_obj_event_num(event_num))
return get_legacy_obj_type(opcode);
switch (opcode) {
case MLX5_CMD_OP_CREATE_GENERAL_OBJECT:
return (obj->obj_id >> 48);
case MLX5_CMD_OP_CREATE_RQ:
return MLX5_OBJ_TYPE_RQ;
case MLX5_CMD_OP_CREATE_QP:
return MLX5_OBJ_TYPE_QP;
case MLX5_CMD_OP_CREATE_SQ:
return MLX5_OBJ_TYPE_SQ;
case MLX5_CMD_OP_CREATE_DCT:
return MLX5_OBJ_TYPE_DCT;
case MLX5_CMD_OP_CREATE_TIR:
return MLX5_OBJ_TYPE_TIR;
case MLX5_CMD_OP_CREATE_TIS:
return MLX5_OBJ_TYPE_TIS;
case MLX5_CMD_OP_CREATE_PSV:
return MLX5_OBJ_TYPE_PSV;
case MLX5_OBJ_TYPE_MKEY:
return MLX5_OBJ_TYPE_MKEY;
case MLX5_CMD_OP_CREATE_RMP:
return MLX5_OBJ_TYPE_RMP;
case MLX5_CMD_OP_CREATE_XRC_SRQ:
return MLX5_OBJ_TYPE_XRC_SRQ;
case MLX5_CMD_OP_CREATE_XRQ:
return MLX5_OBJ_TYPE_XRQ;
case MLX5_CMD_OP_CREATE_RQT:
return MLX5_OBJ_TYPE_RQT;
case MLX5_CMD_OP_ALLOC_FLOW_COUNTER:
return MLX5_OBJ_TYPE_FLOW_COUNTER;
case MLX5_CMD_OP_CREATE_CQ:
return MLX5_OBJ_TYPE_CQ;
default:
return 0;
}
}
static u16 get_event_obj_type(unsigned long event_type, struct mlx5_eqe *eqe)
{
switch (event_type) {
case MLX5_EVENT_TYPE_WQ_CATAS_ERROR:
case MLX5_EVENT_TYPE_WQ_ACCESS_ERROR:
case MLX5_EVENT_TYPE_WQ_INVAL_REQ_ERROR:
case MLX5_EVENT_TYPE_SRQ_LAST_WQE:
case MLX5_EVENT_TYPE_PATH_MIG:
case MLX5_EVENT_TYPE_PATH_MIG_FAILED:
case MLX5_EVENT_TYPE_COMM_EST:
case MLX5_EVENT_TYPE_SQ_DRAINED:
case MLX5_EVENT_TYPE_SRQ_RQ_LIMIT:
case MLX5_EVENT_TYPE_SRQ_CATAS_ERROR:
return eqe->data.qp_srq.type;
case MLX5_EVENT_TYPE_CQ_ERROR:
case MLX5_EVENT_TYPE_XRQ_ERROR:
return 0;
case MLX5_EVENT_TYPE_DCT_DRAINED:
case MLX5_EVENT_TYPE_DCT_KEY_VIOLATION:
return MLX5_EVENT_QUEUE_TYPE_DCT;
default:
return MLX5_GET(affiliated_event_header, &eqe->data, obj_type);
}
}
static u32 get_dec_obj_id(u64 obj_id)
{
return (obj_id & 0xffffffff);
}
/*
* As the obj_id in the firmware is not globally unique the object type
* must be considered upon checking for a valid object id.
* For that the opcode of the creator command is encoded as part of the obj_id.
*/
static u64 get_enc_obj_id(u32 opcode, u32 obj_id)
{
return ((u64)opcode << 32) | obj_id;
}
static u64 devx_get_obj_id(const void *in)
{
u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode);
u64 obj_id;
switch (opcode) {
case MLX5_CMD_OP_MODIFY_GENERAL_OBJECT:
case MLX5_CMD_OP_QUERY_GENERAL_OBJECT:
obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_GENERAL_OBJECT |
MLX5_GET(general_obj_in_cmd_hdr, in,
obj_type) << 16,
MLX5_GET(general_obj_in_cmd_hdr, in,
obj_id));
break;
case MLX5_CMD_OP_QUERY_MKEY:
obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_MKEY,
MLX5_GET(query_mkey_in, in,
mkey_index));
break;
case MLX5_CMD_OP_QUERY_CQ:
obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_CQ,
MLX5_GET(query_cq_in, in, cqn));
break;
case MLX5_CMD_OP_MODIFY_CQ:
obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_CQ,
MLX5_GET(modify_cq_in, in, cqn));
break;
case MLX5_CMD_OP_QUERY_SQ:
obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_SQ,
MLX5_GET(query_sq_in, in, sqn));
break;
case MLX5_CMD_OP_MODIFY_SQ:
obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_SQ,
MLX5_GET(modify_sq_in, in, sqn));
break;
case MLX5_CMD_OP_QUERY_RQ:
obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_RQ,
MLX5_GET(query_rq_in, in, rqn));
break;
case MLX5_CMD_OP_MODIFY_RQ:
obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_RQ,
MLX5_GET(modify_rq_in, in, rqn));
break;
case MLX5_CMD_OP_QUERY_RMP:
obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_RMP,
MLX5_GET(query_rmp_in, in, rmpn));
break;
case MLX5_CMD_OP_MODIFY_RMP:
obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_RMP,
MLX5_GET(modify_rmp_in, in, rmpn));
break;
case MLX5_CMD_OP_QUERY_RQT:
obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_RQT,
MLX5_GET(query_rqt_in, in, rqtn));
break;
case MLX5_CMD_OP_MODIFY_RQT:
obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_RQT,
MLX5_GET(modify_rqt_in, in, rqtn));
break;
case MLX5_CMD_OP_QUERY_TIR:
obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_TIR,
MLX5_GET(query_tir_in, in, tirn));
break;
case MLX5_CMD_OP_MODIFY_TIR:
obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_TIR,
MLX5_GET(modify_tir_in, in, tirn));
break;
case MLX5_CMD_OP_QUERY_TIS:
obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_TIS,
MLX5_GET(query_tis_in, in, tisn));
break;
case MLX5_CMD_OP_MODIFY_TIS:
obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_TIS,
MLX5_GET(modify_tis_in, in, tisn));
break;
case MLX5_CMD_OP_QUERY_FLOW_TABLE:
obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_FLOW_TABLE,
MLX5_GET(query_flow_table_in, in,
table_id));
break;
case MLX5_CMD_OP_MODIFY_FLOW_TABLE:
obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_FLOW_TABLE,
MLX5_GET(modify_flow_table_in, in,
table_id));
break;
case MLX5_CMD_OP_QUERY_FLOW_GROUP:
obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_FLOW_GROUP,
MLX5_GET(query_flow_group_in, in,
group_id));
break;
case MLX5_CMD_OP_QUERY_FLOW_TABLE_ENTRY:
obj_id = get_enc_obj_id(MLX5_CMD_OP_SET_FLOW_TABLE_ENTRY,
MLX5_GET(query_fte_in, in,
flow_index));
break;
case MLX5_CMD_OP_SET_FLOW_TABLE_ENTRY:
obj_id = get_enc_obj_id(MLX5_CMD_OP_SET_FLOW_TABLE_ENTRY,
MLX5_GET(set_fte_in, in, flow_index));
break;
case MLX5_CMD_OP_QUERY_Q_COUNTER:
obj_id = get_enc_obj_id(MLX5_CMD_OP_ALLOC_Q_COUNTER,
MLX5_GET(query_q_counter_in, in,
counter_set_id));
break;
case MLX5_CMD_OP_QUERY_FLOW_COUNTER:
obj_id = get_enc_obj_id(MLX5_CMD_OP_ALLOC_FLOW_COUNTER,
MLX5_GET(query_flow_counter_in, in,
flow_counter_id));
break;
case MLX5_CMD_OP_QUERY_MODIFY_HEADER_CONTEXT:
obj_id = get_enc_obj_id(MLX5_CMD_OP_ALLOC_MODIFY_HEADER_CONTEXT,
MLX5_GET(general_obj_in_cmd_hdr, in,
obj_id));
break;
case MLX5_CMD_OP_QUERY_SCHEDULING_ELEMENT:
obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_SCHEDULING_ELEMENT,
MLX5_GET(query_scheduling_element_in,
in, scheduling_element_id));
break;
case MLX5_CMD_OP_MODIFY_SCHEDULING_ELEMENT:
obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_SCHEDULING_ELEMENT,
MLX5_GET(modify_scheduling_element_in,
in, scheduling_element_id));
break;
case MLX5_CMD_OP_ADD_VXLAN_UDP_DPORT:
obj_id = get_enc_obj_id(MLX5_CMD_OP_ADD_VXLAN_UDP_DPORT,
MLX5_GET(add_vxlan_udp_dport_in, in,
vxlan_udp_port));
break;
case MLX5_CMD_OP_QUERY_L2_TABLE_ENTRY:
obj_id = get_enc_obj_id(MLX5_CMD_OP_SET_L2_TABLE_ENTRY,
MLX5_GET(query_l2_table_entry_in, in,
table_index));
break;
case MLX5_CMD_OP_SET_L2_TABLE_ENTRY:
obj_id = get_enc_obj_id(MLX5_CMD_OP_SET_L2_TABLE_ENTRY,
MLX5_GET(set_l2_table_entry_in, in,
table_index));
break;
case MLX5_CMD_OP_QUERY_QP:
obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_QP,
MLX5_GET(query_qp_in, in, qpn));
break;
case MLX5_CMD_OP_RST2INIT_QP:
obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_QP,
MLX5_GET(rst2init_qp_in, in, qpn));
break;
case MLX5_CMD_OP_INIT2RTR_QP:
obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_QP,
MLX5_GET(init2rtr_qp_in, in, qpn));
break;
case MLX5_CMD_OP_RTR2RTS_QP:
obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_QP,
MLX5_GET(rtr2rts_qp_in, in, qpn));
break;
case MLX5_CMD_OP_RTS2RTS_QP:
obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_QP,
MLX5_GET(rts2rts_qp_in, in, qpn));
break;
case MLX5_CMD_OP_SQERR2RTS_QP:
obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_QP,
MLX5_GET(sqerr2rts_qp_in, in, qpn));
break;
case MLX5_CMD_OP_2ERR_QP:
obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_QP,
MLX5_GET(qp_2err_in, in, qpn));
break;
case MLX5_CMD_OP_2RST_QP:
obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_QP,
MLX5_GET(qp_2rst_in, in, qpn));
break;
case MLX5_CMD_OP_QUERY_DCT:
obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_DCT,
MLX5_GET(query_dct_in, in, dctn));
break;
case MLX5_CMD_OP_QUERY_XRQ:
case MLX5_CMD_OP_QUERY_XRQ_DC_PARAMS_ENTRY:
case MLX5_CMD_OP_QUERY_XRQ_ERROR_PARAMS:
obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_XRQ,
MLX5_GET(query_xrq_in, in, xrqn));
break;
case MLX5_CMD_OP_QUERY_XRC_SRQ:
obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_XRC_SRQ,
MLX5_GET(query_xrc_srq_in, in,
xrc_srqn));
break;
case MLX5_CMD_OP_ARM_XRC_SRQ:
obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_XRC_SRQ,
MLX5_GET(arm_xrc_srq_in, in, xrc_srqn));
break;
case MLX5_CMD_OP_QUERY_SRQ:
obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_SRQ,
MLX5_GET(query_srq_in, in, srqn));
break;
case MLX5_CMD_OP_ARM_RQ:
obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_RQ,
MLX5_GET(arm_rq_in, in, srq_number));
break;
case MLX5_CMD_OP_ARM_DCT_FOR_KEY_VIOLATION:
obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_DCT,
MLX5_GET(drain_dct_in, in, dctn));
break;
case MLX5_CMD_OP_ARM_XRQ:
case MLX5_CMD_OP_SET_XRQ_DC_PARAMS_ENTRY:
case MLX5_CMD_OP_RELEASE_XRQ_ERROR:
case MLX5_CMD_OP_MODIFY_XRQ:
obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_XRQ,
MLX5_GET(arm_xrq_in, in, xrqn));
break;
case MLX5_CMD_OP_QUERY_PACKET_REFORMAT_CONTEXT:
obj_id = get_enc_obj_id
(MLX5_CMD_OP_ALLOC_PACKET_REFORMAT_CONTEXT,
MLX5_GET(query_packet_reformat_context_in,
in, packet_reformat_id));
break;
default:
obj_id = 0;
}
return obj_id;
}
static bool devx_is_valid_obj_id(struct uverbs_attr_bundle *attrs,
struct ib_uobject *uobj, const void *in)
{
struct mlx5_ib_dev *dev = mlx5_udata_to_mdev(&attrs->driver_udata);
u64 obj_id = devx_get_obj_id(in);
if (!obj_id)
return false;
switch (uobj_get_object_id(uobj)) {
case UVERBS_OBJECT_CQ:
return get_enc_obj_id(MLX5_CMD_OP_CREATE_CQ,
to_mcq(uobj->object)->mcq.cqn) ==
obj_id;
case UVERBS_OBJECT_SRQ:
{
struct mlx5_core_srq *srq = &(to_msrq(uobj->object)->msrq);
u16 opcode;
switch (srq->common.res) {
case MLX5_RES_XSRQ:
opcode = MLX5_CMD_OP_CREATE_XRC_SRQ;
break;
case MLX5_RES_XRQ:
opcode = MLX5_CMD_OP_CREATE_XRQ;
break;
default:
if (!dev->mdev->issi)
opcode = MLX5_CMD_OP_CREATE_SRQ;
else
opcode = MLX5_CMD_OP_CREATE_RMP;
}
return get_enc_obj_id(opcode,
to_msrq(uobj->object)->msrq.srqn) ==
obj_id;
}
case UVERBS_OBJECT_QP:
{
struct mlx5_ib_qp *qp = to_mqp(uobj->object);
enum ib_qp_type qp_type = qp->ibqp.qp_type;
if (qp_type == IB_QPT_RAW_PACKET ||
(qp->flags & MLX5_IB_QP_UNDERLAY)) {
struct mlx5_ib_raw_packet_qp *raw_packet_qp =
&qp->raw_packet_qp;
struct mlx5_ib_rq *rq = &raw_packet_qp->rq;
struct mlx5_ib_sq *sq = &raw_packet_qp->sq;
return (get_enc_obj_id(MLX5_CMD_OP_CREATE_RQ,
rq->base.mqp.qpn) == obj_id ||
get_enc_obj_id(MLX5_CMD_OP_CREATE_SQ,
sq->base.mqp.qpn) == obj_id ||
get_enc_obj_id(MLX5_CMD_OP_CREATE_TIR,
rq->tirn) == obj_id ||
get_enc_obj_id(MLX5_CMD_OP_CREATE_TIS,
sq->tisn) == obj_id);
}
if (qp_type == MLX5_IB_QPT_DCT)
return get_enc_obj_id(MLX5_CMD_OP_CREATE_DCT,
qp->dct.mdct.mqp.qpn) == obj_id;
return get_enc_obj_id(MLX5_CMD_OP_CREATE_QP,
qp->ibqp.qp_num) == obj_id;
}
case UVERBS_OBJECT_WQ:
return get_enc_obj_id(MLX5_CMD_OP_CREATE_RQ,
to_mrwq(uobj->object)->core_qp.qpn) ==
obj_id;
case UVERBS_OBJECT_RWQ_IND_TBL:
return get_enc_obj_id(MLX5_CMD_OP_CREATE_RQT,
to_mrwq_ind_table(uobj->object)->rqtn) ==
obj_id;
case MLX5_IB_OBJECT_DEVX_OBJ:
return ((struct devx_obj *)uobj->object)->obj_id == obj_id;
default:
return false;
}
}
static void devx_set_umem_valid(const void *in)
{
u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode);
switch (opcode) {
case MLX5_CMD_OP_CREATE_MKEY:
MLX5_SET(create_mkey_in, in, mkey_umem_valid, 1);
break;
case MLX5_CMD_OP_CREATE_CQ:
{
void *cqc;
MLX5_SET(create_cq_in, in, cq_umem_valid, 1);
cqc = MLX5_ADDR_OF(create_cq_in, in, cq_context);
MLX5_SET(cqc, cqc, dbr_umem_valid, 1);
break;
}
case MLX5_CMD_OP_CREATE_QP:
{
void *qpc;
qpc = MLX5_ADDR_OF(create_qp_in, in, qpc);
MLX5_SET(qpc, qpc, dbr_umem_valid, 1);
MLX5_SET(create_qp_in, in, wq_umem_valid, 1);
break;
}
case MLX5_CMD_OP_CREATE_RQ:
{
void *rqc, *wq;
rqc = MLX5_ADDR_OF(create_rq_in, in, ctx);
wq = MLX5_ADDR_OF(rqc, rqc, wq);
MLX5_SET(wq, wq, dbr_umem_valid, 1);
MLX5_SET(wq, wq, wq_umem_valid, 1);
break;
}
case MLX5_CMD_OP_CREATE_SQ:
{
void *sqc, *wq;
sqc = MLX5_ADDR_OF(create_sq_in, in, ctx);
wq = MLX5_ADDR_OF(sqc, sqc, wq);
MLX5_SET(wq, wq, dbr_umem_valid, 1);
MLX5_SET(wq, wq, wq_umem_valid, 1);
break;
}
case MLX5_CMD_OP_MODIFY_CQ:
MLX5_SET(modify_cq_in, in, cq_umem_valid, 1);
break;
case MLX5_CMD_OP_CREATE_RMP:
{
void *rmpc, *wq;
rmpc = MLX5_ADDR_OF(create_rmp_in, in, ctx);
wq = MLX5_ADDR_OF(rmpc, rmpc, wq);
MLX5_SET(wq, wq, dbr_umem_valid, 1);
MLX5_SET(wq, wq, wq_umem_valid, 1);
break;
}
case MLX5_CMD_OP_CREATE_XRQ:
{
void *xrqc, *wq;
xrqc = MLX5_ADDR_OF(create_xrq_in, in, xrq_context);
wq = MLX5_ADDR_OF(xrqc, xrqc, wq);
MLX5_SET(wq, wq, dbr_umem_valid, 1);
MLX5_SET(wq, wq, wq_umem_valid, 1);
break;
}
case MLX5_CMD_OP_CREATE_XRC_SRQ:
{
void *xrc_srqc;
MLX5_SET(create_xrc_srq_in, in, xrc_srq_umem_valid, 1);
xrc_srqc = MLX5_ADDR_OF(create_xrc_srq_in, in,
xrc_srq_context_entry);
MLX5_SET(xrc_srqc, xrc_srqc, dbr_umem_valid, 1);
break;
}
default:
return;
}
}
static bool devx_is_obj_create_cmd(const void *in, u16 *opcode)
{
*opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode);
switch (*opcode) {
case MLX5_CMD_OP_CREATE_GENERAL_OBJECT:
case MLX5_CMD_OP_CREATE_MKEY:
case MLX5_CMD_OP_CREATE_CQ:
case MLX5_CMD_OP_ALLOC_PD:
case MLX5_CMD_OP_ALLOC_TRANSPORT_DOMAIN:
case MLX5_CMD_OP_CREATE_RMP:
case MLX5_CMD_OP_CREATE_SQ:
case MLX5_CMD_OP_CREATE_RQ:
case MLX5_CMD_OP_CREATE_RQT:
case MLX5_CMD_OP_CREATE_TIR:
case MLX5_CMD_OP_CREATE_TIS:
case MLX5_CMD_OP_ALLOC_Q_COUNTER:
case MLX5_CMD_OP_CREATE_FLOW_TABLE:
case MLX5_CMD_OP_CREATE_FLOW_GROUP:
case MLX5_CMD_OP_ALLOC_FLOW_COUNTER:
case MLX5_CMD_OP_ALLOC_PACKET_REFORMAT_CONTEXT:
case MLX5_CMD_OP_ALLOC_MODIFY_HEADER_CONTEXT:
case MLX5_CMD_OP_CREATE_SCHEDULING_ELEMENT:
case MLX5_CMD_OP_ADD_VXLAN_UDP_DPORT:
case MLX5_CMD_OP_SET_L2_TABLE_ENTRY:
case MLX5_CMD_OP_CREATE_QP:
case MLX5_CMD_OP_CREATE_SRQ:
case MLX5_CMD_OP_CREATE_XRC_SRQ:
case MLX5_CMD_OP_CREATE_DCT:
case MLX5_CMD_OP_CREATE_XRQ:
case MLX5_CMD_OP_ATTACH_TO_MCG:
case MLX5_CMD_OP_ALLOC_XRCD:
return true;
case MLX5_CMD_OP_SET_FLOW_TABLE_ENTRY:
{
u16 op_mod = MLX5_GET(set_fte_in, in, op_mod);
if (op_mod == 0)
return true;
return false;
}
case MLX5_CMD_OP_CREATE_PSV:
{
u8 num_psv = MLX5_GET(create_psv_in, in, num_psv);
if (num_psv == 1)
return true;
return false;
}
default:
return false;
}
}
static bool devx_is_obj_modify_cmd(const void *in)
{
u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode);
switch (opcode) {
case MLX5_CMD_OP_MODIFY_GENERAL_OBJECT:
case MLX5_CMD_OP_MODIFY_CQ:
case MLX5_CMD_OP_MODIFY_RMP:
case MLX5_CMD_OP_MODIFY_SQ:
case MLX5_CMD_OP_MODIFY_RQ:
case MLX5_CMD_OP_MODIFY_RQT:
case MLX5_CMD_OP_MODIFY_TIR:
case MLX5_CMD_OP_MODIFY_TIS:
case MLX5_CMD_OP_MODIFY_FLOW_TABLE:
case MLX5_CMD_OP_MODIFY_SCHEDULING_ELEMENT:
case MLX5_CMD_OP_ADD_VXLAN_UDP_DPORT:
case MLX5_CMD_OP_SET_L2_TABLE_ENTRY:
case MLX5_CMD_OP_RST2INIT_QP:
case MLX5_CMD_OP_INIT2RTR_QP:
case MLX5_CMD_OP_RTR2RTS_QP:
case MLX5_CMD_OP_RTS2RTS_QP:
case MLX5_CMD_OP_SQERR2RTS_QP:
case MLX5_CMD_OP_2ERR_QP:
case MLX5_CMD_OP_2RST_QP:
case MLX5_CMD_OP_ARM_XRC_SRQ:
case MLX5_CMD_OP_ARM_RQ:
case MLX5_CMD_OP_ARM_DCT_FOR_KEY_VIOLATION:
case MLX5_CMD_OP_ARM_XRQ:
case MLX5_CMD_OP_SET_XRQ_DC_PARAMS_ENTRY:
case MLX5_CMD_OP_RELEASE_XRQ_ERROR:
case MLX5_CMD_OP_MODIFY_XRQ:
return true;
case MLX5_CMD_OP_SET_FLOW_TABLE_ENTRY:
{
u16 op_mod = MLX5_GET(set_fte_in, in, op_mod);
if (op_mod == 1)
return true;
return false;
}
default:
return false;
}
}
static bool devx_is_obj_query_cmd(const void *in)
{
u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode);
switch (opcode) {
case MLX5_CMD_OP_QUERY_GENERAL_OBJECT:
case MLX5_CMD_OP_QUERY_MKEY:
case MLX5_CMD_OP_QUERY_CQ:
case MLX5_CMD_OP_QUERY_RMP:
case MLX5_CMD_OP_QUERY_SQ:
case MLX5_CMD_OP_QUERY_RQ:
case MLX5_CMD_OP_QUERY_RQT:
case MLX5_CMD_OP_QUERY_TIR:
case MLX5_CMD_OP_QUERY_TIS:
case MLX5_CMD_OP_QUERY_Q_COUNTER:
case MLX5_CMD_OP_QUERY_FLOW_TABLE:
case MLX5_CMD_OP_QUERY_FLOW_GROUP:
case MLX5_CMD_OP_QUERY_FLOW_TABLE_ENTRY:
case MLX5_CMD_OP_QUERY_FLOW_COUNTER:
case MLX5_CMD_OP_QUERY_MODIFY_HEADER_CONTEXT:
case MLX5_CMD_OP_QUERY_SCHEDULING_ELEMENT:
case MLX5_CMD_OP_QUERY_L2_TABLE_ENTRY:
case MLX5_CMD_OP_QUERY_QP:
case MLX5_CMD_OP_QUERY_SRQ:
case MLX5_CMD_OP_QUERY_XRC_SRQ:
case MLX5_CMD_OP_QUERY_DCT:
case MLX5_CMD_OP_QUERY_XRQ:
case MLX5_CMD_OP_QUERY_XRQ_DC_PARAMS_ENTRY:
case MLX5_CMD_OP_QUERY_XRQ_ERROR_PARAMS:
case MLX5_CMD_OP_QUERY_PACKET_REFORMAT_CONTEXT:
return true;
default:
return false;
}
}
static bool devx_is_whitelist_cmd(void *in)
{
u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode);
switch (opcode) {
case MLX5_CMD_OP_QUERY_HCA_CAP:
case MLX5_CMD_OP_QUERY_HCA_VPORT_CONTEXT:
case MLX5_CMD_OP_QUERY_ESW_VPORT_CONTEXT:
return true;
default:
return false;
}
}
static int devx_get_uid(struct mlx5_ib_ucontext *c, void *cmd_in)
{
if (devx_is_whitelist_cmd(cmd_in)) {
struct mlx5_ib_dev *dev;
if (c->devx_uid)
return c->devx_uid;
dev = to_mdev(c->ibucontext.device);
if (dev->devx_whitelist_uid)
return dev->devx_whitelist_uid;
return -EOPNOTSUPP;
}
if (!c->devx_uid)
return -EINVAL;
return c->devx_uid;
}
static bool devx_is_general_cmd(void *in, struct mlx5_ib_dev *dev)
{
u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode);
/* Pass all cmds for vhca_tunnel as general, tracking is done in FW */
if ((MLX5_CAP_GEN_64(dev->mdev, vhca_tunnel_commands) &&
MLX5_GET(general_obj_in_cmd_hdr, in, vhca_tunnel_id)) ||
(opcode >= MLX5_CMD_OP_GENERAL_START &&
opcode < MLX5_CMD_OP_GENERAL_END))
return true;
switch (opcode) {
case MLX5_CMD_OP_QUERY_HCA_CAP:
case MLX5_CMD_OP_QUERY_HCA_VPORT_CONTEXT:
case MLX5_CMD_OP_QUERY_ESW_VPORT_CONTEXT:
case MLX5_CMD_OP_QUERY_VPORT_STATE:
case MLX5_CMD_OP_QUERY_ADAPTER:
case MLX5_CMD_OP_QUERY_ISSI:
case MLX5_CMD_OP_QUERY_NIC_VPORT_CONTEXT:
case MLX5_CMD_OP_QUERY_ROCE_ADDRESS:
case MLX5_CMD_OP_QUERY_VNIC_ENV:
case MLX5_CMD_OP_QUERY_VPORT_COUNTER:
case MLX5_CMD_OP_GET_DROPPED_PACKET_LOG:
case MLX5_CMD_OP_NOP:
case MLX5_CMD_OP_QUERY_CONG_STATUS:
case MLX5_CMD_OP_QUERY_CONG_PARAMS:
case MLX5_CMD_OP_QUERY_CONG_STATISTICS:
case MLX5_CMD_OP_QUERY_LAG:
return true;
default:
return false;
}
}
static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_QUERY_EQN)(
struct uverbs_attr_bundle *attrs)
{
struct mlx5_ib_ucontext *c;
struct mlx5_ib_dev *dev;
int user_vector;
int dev_eqn;
unsigned int irqn;
int err;
if (uverbs_copy_from(&user_vector, attrs,
MLX5_IB_ATTR_DEVX_QUERY_EQN_USER_VEC))
return -EFAULT;
c = devx_ufile2uctx(attrs);
if (IS_ERR(c))
return PTR_ERR(c);
dev = to_mdev(c->ibucontext.device);
err = mlx5_vector2eqn(dev->mdev, user_vector, &dev_eqn, &irqn);
if (err < 0)
return err;
if (uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_QUERY_EQN_DEV_EQN,
&dev_eqn, sizeof(dev_eqn)))
return -EFAULT;
return 0;
}
/*
*Security note:
* The hardware protection mechanism works like this: Each device object that
* is subject to UAR doorbells (QP/SQ/CQ) gets a UAR ID (called uar_page in
* the device specification manual) upon its creation. Then upon doorbell,
* hardware fetches the object context for which the doorbell was rang, and
* validates that the UAR through which the DB was rang matches the UAR ID
* of the object.
* If no match the doorbell is silently ignored by the hardware. Of course,
* the user cannot ring a doorbell on a UAR that was not mapped to it.
* Now in devx, as the devx kernel does not manipulate the QP/SQ/CQ command
* mailboxes (except tagging them with UID), we expose to the user its UAR
* ID, so it can embed it in these objects in the expected specification
* format. So the only thing the user can do is hurt itself by creating a
* QP/SQ/CQ with a UAR ID other than his, and then in this case other users
* may ring a doorbell on its objects.
* The consequence of that will be that another user can schedule a QP/SQ
* of the buggy user for execution (just insert it to the hardware schedule
* queue or arm its CQ for event generation), no further harm is expected.
*/
static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_QUERY_UAR)(
struct uverbs_attr_bundle *attrs)
{
struct mlx5_ib_ucontext *c;
struct mlx5_ib_dev *dev;
u32 user_idx;
s32 dev_idx;
c = devx_ufile2uctx(attrs);
if (IS_ERR(c))
return PTR_ERR(c);
dev = to_mdev(c->ibucontext.device);
if (uverbs_copy_from(&user_idx, attrs,
MLX5_IB_ATTR_DEVX_QUERY_UAR_USER_IDX))
return -EFAULT;
dev_idx = bfregn_to_uar_index(dev, &c->bfregi, user_idx, true);
if (dev_idx < 0)
return dev_idx;
if (uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_QUERY_UAR_DEV_IDX,
&dev_idx, sizeof(dev_idx)))
return -EFAULT;
return 0;
}
static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OTHER)(
struct uverbs_attr_bundle *attrs)
{
struct mlx5_ib_ucontext *c;
struct mlx5_ib_dev *dev;
void *cmd_in = uverbs_attr_get_alloced_ptr(
attrs, MLX5_IB_ATTR_DEVX_OTHER_CMD_IN);
int cmd_out_len = uverbs_attr_get_len(attrs,
MLX5_IB_ATTR_DEVX_OTHER_CMD_OUT);
void *cmd_out;
int err;
int uid;
c = devx_ufile2uctx(attrs);
if (IS_ERR(c))
return PTR_ERR(c);
dev = to_mdev(c->ibucontext.device);
uid = devx_get_uid(c, cmd_in);
if (uid < 0)
return uid;
/* Only white list of some general HCA commands are allowed for this method. */
if (!devx_is_general_cmd(cmd_in, dev))
return -EINVAL;
cmd_out = uverbs_zalloc(attrs, cmd_out_len);
if (IS_ERR(cmd_out))
return PTR_ERR(cmd_out);
MLX5_SET(general_obj_in_cmd_hdr, cmd_in, uid, uid);
err = mlx5_cmd_exec(dev->mdev, cmd_in,
uverbs_attr_get_len(attrs, MLX5_IB_ATTR_DEVX_OTHER_CMD_IN),
cmd_out, cmd_out_len);
if (err)
return err;
return uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_OTHER_CMD_OUT, cmd_out,
cmd_out_len);
}
static void devx_obj_build_destroy_cmd(void *in, void *out, void *din,
u32 *dinlen,
u32 *obj_id)
{
u16 obj_type = MLX5_GET(general_obj_in_cmd_hdr, in, obj_type);
u16 uid = MLX5_GET(general_obj_in_cmd_hdr, in, uid);
*obj_id = MLX5_GET(general_obj_out_cmd_hdr, out, obj_id);
*dinlen = MLX5_ST_SZ_BYTES(general_obj_in_cmd_hdr);
MLX5_SET(general_obj_in_cmd_hdr, din, obj_id, *obj_id);
MLX5_SET(general_obj_in_cmd_hdr, din, uid, uid);
switch (MLX5_GET(general_obj_in_cmd_hdr, in, opcode)) {
case MLX5_CMD_OP_CREATE_GENERAL_OBJECT:
MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_GENERAL_OBJECT);
MLX5_SET(general_obj_in_cmd_hdr, din, obj_type, obj_type);
break;
case MLX5_CMD_OP_CREATE_UMEM:
MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
MLX5_CMD_OP_DESTROY_UMEM);
break;
case MLX5_CMD_OP_CREATE_MKEY:
MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_MKEY);
break;
case MLX5_CMD_OP_CREATE_CQ:
MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_CQ);
break;
case MLX5_CMD_OP_ALLOC_PD:
MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DEALLOC_PD);
break;
case MLX5_CMD_OP_ALLOC_TRANSPORT_DOMAIN:
MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
MLX5_CMD_OP_DEALLOC_TRANSPORT_DOMAIN);
break;
case MLX5_CMD_OP_CREATE_RMP:
MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_RMP);
break;
case MLX5_CMD_OP_CREATE_SQ:
MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_SQ);
break;
case MLX5_CMD_OP_CREATE_RQ:
MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_RQ);
break;
case MLX5_CMD_OP_CREATE_RQT:
MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_RQT);
break;
case MLX5_CMD_OP_CREATE_TIR:
MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_TIR);
break;
case MLX5_CMD_OP_CREATE_TIS:
MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_TIS);
break;
case MLX5_CMD_OP_ALLOC_Q_COUNTER:
MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
MLX5_CMD_OP_DEALLOC_Q_COUNTER);
break;
case MLX5_CMD_OP_CREATE_FLOW_TABLE:
*dinlen = MLX5_ST_SZ_BYTES(destroy_flow_table_in);
*obj_id = MLX5_GET(create_flow_table_out, out, table_id);
MLX5_SET(destroy_flow_table_in, din, other_vport,
MLX5_GET(create_flow_table_in, in, other_vport));
MLX5_SET(destroy_flow_table_in, din, vport_number,
MLX5_GET(create_flow_table_in, in, vport_number));
MLX5_SET(destroy_flow_table_in, din, table_type,
MLX5_GET(create_flow_table_in, in, table_type));
MLX5_SET(destroy_flow_table_in, din, table_id, *obj_id);
MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
MLX5_CMD_OP_DESTROY_FLOW_TABLE);
break;
case MLX5_CMD_OP_CREATE_FLOW_GROUP:
*dinlen = MLX5_ST_SZ_BYTES(destroy_flow_group_in);
*obj_id = MLX5_GET(create_flow_group_out, out, group_id);
MLX5_SET(destroy_flow_group_in, din, other_vport,
MLX5_GET(create_flow_group_in, in, other_vport));
MLX5_SET(destroy_flow_group_in, din, vport_number,
MLX5_GET(create_flow_group_in, in, vport_number));
MLX5_SET(destroy_flow_group_in, din, table_type,
MLX5_GET(create_flow_group_in, in, table_type));
MLX5_SET(destroy_flow_group_in, din, table_id,
MLX5_GET(create_flow_group_in, in, table_id));
MLX5_SET(destroy_flow_group_in, din, group_id, *obj_id);
MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
MLX5_CMD_OP_DESTROY_FLOW_GROUP);
break;
case MLX5_CMD_OP_SET_FLOW_TABLE_ENTRY:
*dinlen = MLX5_ST_SZ_BYTES(delete_fte_in);
*obj_id = MLX5_GET(set_fte_in, in, flow_index);
MLX5_SET(delete_fte_in, din, other_vport,
MLX5_GET(set_fte_in, in, other_vport));
MLX5_SET(delete_fte_in, din, vport_number,
MLX5_GET(set_fte_in, in, vport_number));
MLX5_SET(delete_fte_in, din, table_type,
MLX5_GET(set_fte_in, in, table_type));
MLX5_SET(delete_fte_in, din, table_id,
MLX5_GET(set_fte_in, in, table_id));
MLX5_SET(delete_fte_in, din, flow_index, *obj_id);
MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
MLX5_CMD_OP_DELETE_FLOW_TABLE_ENTRY);
break;
case MLX5_CMD_OP_ALLOC_FLOW_COUNTER:
MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
MLX5_CMD_OP_DEALLOC_FLOW_COUNTER);
break;
case MLX5_CMD_OP_ALLOC_PACKET_REFORMAT_CONTEXT:
MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
MLX5_CMD_OP_DEALLOC_PACKET_REFORMAT_CONTEXT);
break;
case MLX5_CMD_OP_ALLOC_MODIFY_HEADER_CONTEXT:
MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
MLX5_CMD_OP_DEALLOC_MODIFY_HEADER_CONTEXT);
break;
case MLX5_CMD_OP_CREATE_SCHEDULING_ELEMENT:
*dinlen = MLX5_ST_SZ_BYTES(destroy_scheduling_element_in);
*obj_id = MLX5_GET(create_scheduling_element_out, out,
scheduling_element_id);
MLX5_SET(destroy_scheduling_element_in, din,
scheduling_hierarchy,
MLX5_GET(create_scheduling_element_in, in,
scheduling_hierarchy));
MLX5_SET(destroy_scheduling_element_in, din,
scheduling_element_id, *obj_id);
MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
MLX5_CMD_OP_DESTROY_SCHEDULING_ELEMENT);
break;
case MLX5_CMD_OP_ADD_VXLAN_UDP_DPORT:
*dinlen = MLX5_ST_SZ_BYTES(delete_vxlan_udp_dport_in);
*obj_id = MLX5_GET(add_vxlan_udp_dport_in, in, vxlan_udp_port);
MLX5_SET(delete_vxlan_udp_dport_in, din, vxlan_udp_port, *obj_id);
MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
MLX5_CMD_OP_DELETE_VXLAN_UDP_DPORT);
break;
case MLX5_CMD_OP_SET_L2_TABLE_ENTRY:
*dinlen = MLX5_ST_SZ_BYTES(delete_l2_table_entry_in);
*obj_id = MLX5_GET(set_l2_table_entry_in, in, table_index);
MLX5_SET(delete_l2_table_entry_in, din, table_index, *obj_id);
MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
MLX5_CMD_OP_DELETE_L2_TABLE_ENTRY);
break;
case MLX5_CMD_OP_CREATE_QP:
MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_QP);
break;
case MLX5_CMD_OP_CREATE_SRQ:
MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_SRQ);
break;
case MLX5_CMD_OP_CREATE_XRC_SRQ:
MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
MLX5_CMD_OP_DESTROY_XRC_SRQ);
break;
case MLX5_CMD_OP_CREATE_DCT:
MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_DCT);
break;
case MLX5_CMD_OP_CREATE_XRQ:
MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_XRQ);
break;
case MLX5_CMD_OP_ATTACH_TO_MCG:
*dinlen = MLX5_ST_SZ_BYTES(detach_from_mcg_in);
MLX5_SET(detach_from_mcg_in, din, qpn,
MLX5_GET(attach_to_mcg_in, in, qpn));
memcpy(MLX5_ADDR_OF(detach_from_mcg_in, din, multicast_gid),
MLX5_ADDR_OF(attach_to_mcg_in, in, multicast_gid),
MLX5_FLD_SZ_BYTES(attach_to_mcg_in, multicast_gid));
MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DETACH_FROM_MCG);
break;
case MLX5_CMD_OP_ALLOC_XRCD:
MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DEALLOC_XRCD);
break;
case MLX5_CMD_OP_CREATE_PSV:
MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
MLX5_CMD_OP_DESTROY_PSV);
MLX5_SET(destroy_psv_in, din, psvn,
MLX5_GET(create_psv_out, out, psv0_index));
break;
default:
/* The entry must match to one of the devx_is_obj_create_cmd */
WARN_ON(true);
break;
}
}
static int devx_handle_mkey_indirect(struct devx_obj *obj,
struct mlx5_ib_dev *dev,
void *in, void *out)
{
struct mlx5_ib_devx_mr *devx_mr = &obj->devx_mr;
struct mlx5_core_mkey *mkey;
void *mkc;
u8 key;
mkey = &devx_mr->mmkey;
mkc = MLX5_ADDR_OF(create_mkey_in, in, memory_key_mkey_entry);
key = MLX5_GET(mkc, mkc, mkey_7_0);
mkey->key = mlx5_idx_to_mkey(
MLX5_GET(create_mkey_out, out, mkey_index)) | key;
mkey->type = MLX5_MKEY_INDIRECT_DEVX;
mkey->iova = MLX5_GET64(mkc, mkc, start_addr);
mkey->size = MLX5_GET64(mkc, mkc, len);
mkey->pd = MLX5_GET(mkc, mkc, pd);
devx_mr->ndescs = MLX5_GET(mkc, mkc, translations_octword_size);
return xa_err(xa_store(&dev->odp_mkeys, mlx5_base_mkey(mkey->key), mkey,
GFP_KERNEL));
}
static int devx_handle_mkey_create(struct mlx5_ib_dev *dev,
struct devx_obj *obj,
void *in, int in_len)
{
int min_len = MLX5_BYTE_OFF(create_mkey_in, memory_key_mkey_entry) +
MLX5_FLD_SZ_BYTES(create_mkey_in,
memory_key_mkey_entry);
void *mkc;
u8 access_mode;
if (in_len < min_len)
return -EINVAL;
mkc = MLX5_ADDR_OF(create_mkey_in, in, memory_key_mkey_entry);
access_mode = MLX5_GET(mkc, mkc, access_mode_1_0);
access_mode |= MLX5_GET(mkc, mkc, access_mode_4_2) << 2;
if (access_mode == MLX5_MKC_ACCESS_MODE_KLMS ||
access_mode == MLX5_MKC_ACCESS_MODE_KSM) {
if (IS_ENABLED(CONFIG_INFINIBAND_ON_DEMAND_PAGING))
obj->flags |= DEVX_OBJ_FLAGS_INDIRECT_MKEY;
return 0;
}
MLX5_SET(create_mkey_in, in, mkey_umem_valid, 1);
return 0;
}
static void devx_cleanup_subscription(struct mlx5_ib_dev *dev,
struct devx_event_subscription *sub)
{
struct devx_event *event;
struct devx_obj_event *xa_val_level2;
if (sub->is_cleaned)
return;
sub->is_cleaned = 1;
list_del_rcu(&sub->xa_list);
if (list_empty(&sub->obj_list))
return;
list_del_rcu(&sub->obj_list);
/* check whether key level 1 for this obj_sub_list is empty */
event = xa_load(&dev->devx_event_table.event_xa,
sub->xa_key_level1);
WARN_ON(!event);
xa_val_level2 = xa_load(&event->object_ids, sub->xa_key_level2);
if (list_empty(&xa_val_level2->obj_sub_list)) {
xa_erase(&event->object_ids,
sub->xa_key_level2);
kfree_rcu(xa_val_level2, rcu);
}
}
static int devx_obj_cleanup(struct ib_uobject *uobject,
enum rdma_remove_reason why,
struct uverbs_attr_bundle *attrs)
{
u32 out[MLX5_ST_SZ_DW(general_obj_out_cmd_hdr)];
struct mlx5_devx_event_table *devx_event_table;
struct devx_obj *obj = uobject->object;
struct devx_event_subscription *sub_entry, *tmp;
struct mlx5_ib_dev *dev;
int ret;
dev = mlx5_udata_to_mdev(&attrs->driver_udata);
if (obj->flags & DEVX_OBJ_FLAGS_INDIRECT_MKEY) {
/*
* The pagefault_single_data_segment() does commands against
* the mmkey, we must wait for that to stop before freeing the
* mkey, as another allocation could get the same mkey #.
*/
xa_erase(&obj->ib_dev->odp_mkeys,
mlx5_base_mkey(obj->devx_mr.mmkey.key));
synchronize_srcu(&dev->odp_srcu);
}
if (obj->flags & DEVX_OBJ_FLAGS_DCT)
ret = mlx5_core_destroy_dct(obj->ib_dev->mdev, &obj->core_dct);
else if (obj->flags & DEVX_OBJ_FLAGS_CQ)
ret = mlx5_core_destroy_cq(obj->ib_dev->mdev, &obj->core_cq);
else
ret = mlx5_cmd_exec(obj->ib_dev->mdev, obj->dinbox,
obj->dinlen, out, sizeof(out));
if (ib_is_destroy_retryable(ret, why, uobject))
return ret;
devx_event_table = &dev->devx_event_table;
mutex_lock(&devx_event_table->event_xa_lock);
list_for_each_entry_safe(sub_entry, tmp, &obj->event_sub, obj_list)
devx_cleanup_subscription(dev, sub_entry);
mutex_unlock(&devx_event_table->event_xa_lock);
kfree(obj);
return ret;
}
static void devx_cq_comp(struct mlx5_core_cq *mcq, struct mlx5_eqe *eqe)
{
struct devx_obj *obj = container_of(mcq, struct devx_obj, core_cq);
struct mlx5_devx_event_table *table;
struct devx_event *event;
struct devx_obj_event *obj_event;
u32 obj_id = mcq->cqn;
table = &obj->ib_dev->devx_event_table;
rcu_read_lock();
event = xa_load(&table->event_xa, MLX5_EVENT_TYPE_COMP);
if (!event)
goto out;
obj_event = xa_load(&event->object_ids, obj_id);
if (!obj_event)
goto out;
dispatch_event_fd(&obj_event->obj_sub_list, eqe);
out:
rcu_read_unlock();
}
static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OBJ_CREATE)(
struct uverbs_attr_bundle *attrs)
{
void *cmd_in = uverbs_attr_get_alloced_ptr(attrs, MLX5_IB_ATTR_DEVX_OBJ_CREATE_CMD_IN);
int cmd_out_len = uverbs_attr_get_len(attrs,
MLX5_IB_ATTR_DEVX_OBJ_CREATE_CMD_OUT);
int cmd_in_len = uverbs_attr_get_len(attrs,
MLX5_IB_ATTR_DEVX_OBJ_CREATE_CMD_IN);
void *cmd_out;
struct ib_uobject *uobj = uverbs_attr_get_uobject(
attrs, MLX5_IB_ATTR_DEVX_OBJ_CREATE_HANDLE);
struct mlx5_ib_ucontext *c = rdma_udata_to_drv_context(
&attrs->driver_udata, struct mlx5_ib_ucontext, ibucontext);
struct mlx5_ib_dev *dev = to_mdev(c->ibucontext.device);
u32 out[MLX5_ST_SZ_DW(general_obj_out_cmd_hdr)];
struct devx_obj *obj;
u16 obj_type = 0;
int err;
int uid;
u32 obj_id;
u16 opcode;
if (MLX5_GET(general_obj_in_cmd_hdr, cmd_in, vhca_tunnel_id))
return -EINVAL;
uid = devx_get_uid(c, cmd_in);
if (uid < 0)
return uid;
if (!devx_is_obj_create_cmd(cmd_in, &opcode))
return -EINVAL;
cmd_out = uverbs_zalloc(attrs, cmd_out_len);
if (IS_ERR(cmd_out))
return PTR_ERR(cmd_out);
obj = kzalloc(sizeof(struct devx_obj), GFP_KERNEL);
if (!obj)
return -ENOMEM;
MLX5_SET(general_obj_in_cmd_hdr, cmd_in, uid, uid);
if (opcode == MLX5_CMD_OP_CREATE_MKEY) {
err = devx_handle_mkey_create(dev, obj, cmd_in, cmd_in_len);
if (err)
goto obj_free;
} else {
devx_set_umem_valid(cmd_in);
}
if (opcode == MLX5_CMD_OP_CREATE_DCT) {
obj->flags |= DEVX_OBJ_FLAGS_DCT;
err = mlx5_core_create_dct(dev->mdev, &obj->core_dct,
cmd_in, cmd_in_len,
cmd_out, cmd_out_len);
} else if (opcode == MLX5_CMD_OP_CREATE_CQ) {
obj->flags |= DEVX_OBJ_FLAGS_CQ;
obj->core_cq.comp = devx_cq_comp;
err = mlx5_core_create_cq(dev->mdev, &obj->core_cq,
cmd_in, cmd_in_len, cmd_out,
cmd_out_len);
} else {
err = mlx5_cmd_exec(dev->mdev, cmd_in,
cmd_in_len,
cmd_out, cmd_out_len);
}
if (err)
goto obj_free;
if (opcode == MLX5_CMD_OP_ALLOC_FLOW_COUNTER) {
u8 bulk = MLX5_GET(alloc_flow_counter_in,
cmd_in,
flow_counter_bulk);
obj->flow_counter_bulk_size = 128UL * bulk;
}
uobj->object = obj;
INIT_LIST_HEAD(&obj->event_sub);
obj->ib_dev = dev;
devx_obj_build_destroy_cmd(cmd_in, cmd_out, obj->dinbox, &obj->dinlen,
&obj_id);
WARN_ON(obj->dinlen > MLX5_MAX_DESTROY_INBOX_SIZE_DW * sizeof(u32));
err = uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_OBJ_CREATE_CMD_OUT, cmd_out, cmd_out_len);
if (err)
goto obj_destroy;
if (opcode == MLX5_CMD_OP_CREATE_GENERAL_OBJECT)
obj_type = MLX5_GET(general_obj_in_cmd_hdr, cmd_in, obj_type);
obj->obj_id = get_enc_obj_id(opcode | obj_type << 16, obj_id);
if (obj->flags & DEVX_OBJ_FLAGS_INDIRECT_MKEY) {
err = devx_handle_mkey_indirect(obj, dev, cmd_in, cmd_out);
if (err)
goto obj_destroy;
}
return 0;
obj_destroy:
if (obj->flags & DEVX_OBJ_FLAGS_DCT)
mlx5_core_destroy_dct(obj->ib_dev->mdev, &obj->core_dct);
else if (obj->flags & DEVX_OBJ_FLAGS_CQ)
mlx5_core_destroy_cq(obj->ib_dev->mdev, &obj->core_cq);
else
mlx5_cmd_exec(obj->ib_dev->mdev, obj->dinbox, obj->dinlen, out,
sizeof(out));
obj_free:
kfree(obj);
return err;
}
static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OBJ_MODIFY)(
struct uverbs_attr_bundle *attrs)
{
void *cmd_in = uverbs_attr_get_alloced_ptr(attrs, MLX5_IB_ATTR_DEVX_OBJ_MODIFY_CMD_IN);
int cmd_out_len = uverbs_attr_get_len(attrs,
MLX5_IB_ATTR_DEVX_OBJ_MODIFY_CMD_OUT);
struct ib_uobject *uobj = uverbs_attr_get_uobject(attrs,
MLX5_IB_ATTR_DEVX_OBJ_MODIFY_HANDLE);
struct mlx5_ib_ucontext *c = rdma_udata_to_drv_context(
&attrs->driver_udata, struct mlx5_ib_ucontext, ibucontext);
struct mlx5_ib_dev *mdev = to_mdev(c->ibucontext.device);
void *cmd_out;
int err;
int uid;
if (MLX5_GET(general_obj_in_cmd_hdr, cmd_in, vhca_tunnel_id))
return -EINVAL;
uid = devx_get_uid(c, cmd_in);
if (uid < 0)
return uid;
if (!devx_is_obj_modify_cmd(cmd_in))
return -EINVAL;
if (!devx_is_valid_obj_id(attrs, uobj, cmd_in))
return -EINVAL;
cmd_out = uverbs_zalloc(attrs, cmd_out_len);
if (IS_ERR(cmd_out))
return PTR_ERR(cmd_out);
MLX5_SET(general_obj_in_cmd_hdr, cmd_in, uid, uid);
devx_set_umem_valid(cmd_in);
err = mlx5_cmd_exec(mdev->mdev, cmd_in,
uverbs_attr_get_len(attrs, MLX5_IB_ATTR_DEVX_OBJ_MODIFY_CMD_IN),
cmd_out, cmd_out_len);
if (err)
return err;
return uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_OBJ_MODIFY_CMD_OUT,
cmd_out, cmd_out_len);
}
static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OBJ_QUERY)(
struct uverbs_attr_bundle *attrs)
{
void *cmd_in = uverbs_attr_get_alloced_ptr(attrs, MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_IN);
int cmd_out_len = uverbs_attr_get_len(attrs,
MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_OUT);
struct ib_uobject *uobj = uverbs_attr_get_uobject(attrs,
MLX5_IB_ATTR_DEVX_OBJ_QUERY_HANDLE);
struct mlx5_ib_ucontext *c = rdma_udata_to_drv_context(
&attrs->driver_udata, struct mlx5_ib_ucontext, ibucontext);
void *cmd_out;
int err;
int uid;
struct mlx5_ib_dev *mdev = to_mdev(c->ibucontext.device);
if (MLX5_GET(general_obj_in_cmd_hdr, cmd_in, vhca_tunnel_id))
return -EINVAL;
uid = devx_get_uid(c, cmd_in);
if (uid < 0)
return uid;
if (!devx_is_obj_query_cmd(cmd_in))
return -EINVAL;
if (!devx_is_valid_obj_id(attrs, uobj, cmd_in))
return -EINVAL;
cmd_out = uverbs_zalloc(attrs, cmd_out_len);
if (IS_ERR(cmd_out))
return PTR_ERR(cmd_out);
MLX5_SET(general_obj_in_cmd_hdr, cmd_in, uid, uid);
err = mlx5_cmd_exec(mdev->mdev, cmd_in,
uverbs_attr_get_len(attrs, MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_IN),
cmd_out, cmd_out_len);
if (err)
return err;
return uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_OUT,
cmd_out, cmd_out_len);
}
struct devx_async_event_queue {
spinlock_t lock;
wait_queue_head_t poll_wait;
struct list_head event_list;
atomic_t bytes_in_use;
u8 is_destroyed:1;
};
struct devx_async_cmd_event_file {
struct ib_uobject uobj;
struct devx_async_event_queue ev_queue;
struct mlx5_async_ctx async_ctx;
};
static void devx_init_event_queue(struct devx_async_event_queue *ev_queue)
{
spin_lock_init(&ev_queue->lock);
INIT_LIST_HEAD(&ev_queue->event_list);
init_waitqueue_head(&ev_queue->poll_wait);
atomic_set(&ev_queue->bytes_in_use, 0);
ev_queue->is_destroyed = 0;
}
static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_ASYNC_CMD_FD_ALLOC)(
struct uverbs_attr_bundle *attrs)
{
struct devx_async_cmd_event_file *ev_file;
struct ib_uobject *uobj = uverbs_attr_get_uobject(
attrs, MLX5_IB_ATTR_DEVX_ASYNC_CMD_FD_ALLOC_HANDLE);
struct mlx5_ib_dev *mdev = mlx5_udata_to_mdev(&attrs->driver_udata);
ev_file = container_of(uobj, struct devx_async_cmd_event_file,
uobj);
devx_init_event_queue(&ev_file->ev_queue);
mlx5_cmd_init_async_ctx(mdev->mdev, &ev_file->async_ctx);
return 0;
}
static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_ASYNC_EVENT_FD_ALLOC)(
struct uverbs_attr_bundle *attrs)
{
struct ib_uobject *uobj = uverbs_attr_get_uobject(
attrs, MLX5_IB_ATTR_DEVX_ASYNC_EVENT_FD_ALLOC_HANDLE);
struct devx_async_event_file *ev_file;
struct mlx5_ib_ucontext *c = rdma_udata_to_drv_context(
&attrs->driver_udata, struct mlx5_ib_ucontext, ibucontext);
struct mlx5_ib_dev *dev = to_mdev(c->ibucontext.device);
u32 flags;
int err;
err = uverbs_get_flags32(&flags, attrs,
MLX5_IB_ATTR_DEVX_ASYNC_EVENT_FD_ALLOC_FLAGS,
MLX5_IB_UAPI_DEVX_CR_EV_CH_FLAGS_OMIT_DATA);
if (err)
return err;
ev_file = container_of(uobj, struct devx_async_event_file,
uobj);
spin_lock_init(&ev_file->lock);
INIT_LIST_HEAD(&ev_file->event_list);
init_waitqueue_head(&ev_file->poll_wait);
if (flags & MLX5_IB_UAPI_DEVX_CR_EV_CH_FLAGS_OMIT_DATA)
ev_file->omit_data = 1;
INIT_LIST_HEAD(&ev_file->subscribed_events_list);
ev_file->dev = dev;
get_device(&dev->ib_dev.dev);
return 0;
}
static void devx_query_callback(int status, struct mlx5_async_work *context)
{
struct devx_async_data *async_data =
container_of(context, struct devx_async_data, cb_work);
struct devx_async_cmd_event_file *ev_file = async_data->ev_file;
struct devx_async_event_queue *ev_queue = &ev_file->ev_queue;
unsigned long flags;
/*
* Note that if the struct devx_async_cmd_event_file uobj begins to be
* destroyed it will block at mlx5_cmd_cleanup_async_ctx() until this
* routine returns, ensuring that it always remains valid here.
*/
spin_lock_irqsave(&ev_queue->lock, flags);
list_add_tail(&async_data->list, &ev_queue->event_list);
spin_unlock_irqrestore(&ev_queue->lock, flags);
wake_up_interruptible(&ev_queue->poll_wait);
}
#define MAX_ASYNC_BYTES_IN_USE (1024 * 1024) /* 1MB */
static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OBJ_ASYNC_QUERY)(
struct uverbs_attr_bundle *attrs)
{
void *cmd_in = uverbs_attr_get_alloced_ptr(attrs,
MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_CMD_IN);
struct ib_uobject *uobj = uverbs_attr_get_uobject(
attrs,
MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_HANDLE);
u16 cmd_out_len;
struct mlx5_ib_ucontext *c = rdma_udata_to_drv_context(
&attrs->driver_udata, struct mlx5_ib_ucontext, ibucontext);
struct ib_uobject *fd_uobj;
int err;
int uid;
struct mlx5_ib_dev *mdev = to_mdev(c->ibucontext.device);
struct devx_async_cmd_event_file *ev_file;
struct devx_async_data *async_data;
if (MLX5_GET(general_obj_in_cmd_hdr, cmd_in, vhca_tunnel_id))
return -EINVAL;
uid = devx_get_uid(c, cmd_in);
if (uid < 0)
return uid;
if (!devx_is_obj_query_cmd(cmd_in))
return -EINVAL;
err = uverbs_get_const(&cmd_out_len, attrs,
MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_OUT_LEN);
if (err)
return err;
if (!devx_is_valid_obj_id(attrs, uobj, cmd_in))
return -EINVAL;
fd_uobj = uverbs_attr_get_uobject(attrs,
MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_FD);
if (IS_ERR(fd_uobj))
return PTR_ERR(fd_uobj);
ev_file = container_of(fd_uobj, struct devx_async_cmd_event_file,
uobj);
if (atomic_add_return(cmd_out_len, &ev_file->ev_queue.bytes_in_use) >
MAX_ASYNC_BYTES_IN_USE) {
atomic_sub(cmd_out_len, &ev_file->ev_queue.bytes_in_use);
return -EAGAIN;
}
async_data = kvzalloc(struct_size(async_data, hdr.out_data,
cmd_out_len), GFP_KERNEL);
if (!async_data) {
err = -ENOMEM;
goto sub_bytes;
}
err = uverbs_copy_from(&async_data->hdr.wr_id, attrs,
MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_WR_ID);
if (err)
goto free_async;
async_data->cmd_out_len = cmd_out_len;
async_data->mdev = mdev;
async_data->ev_file = ev_file;
MLX5_SET(general_obj_in_cmd_hdr, cmd_in, uid, uid);
err = mlx5_cmd_exec_cb(&ev_file->async_ctx, cmd_in,
uverbs_attr_get_len(attrs,
MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_CMD_IN),
async_data->hdr.out_data,
async_data->cmd_out_len,
devx_query_callback, &async_data->cb_work);
if (err)
goto free_async;
return 0;
free_async:
kvfree(async_data);
sub_bytes:
atomic_sub(cmd_out_len, &ev_file->ev_queue.bytes_in_use);
return err;
}
static void
subscribe_event_xa_dealloc(struct mlx5_devx_event_table *devx_event_table,
u32 key_level1,
bool is_level2,
u32 key_level2)
{
struct devx_event *event;
struct devx_obj_event *xa_val_level2;
/* Level 1 is valid for future use, no need to free */
if (!is_level2)
return;
event = xa_load(&devx_event_table->event_xa, key_level1);
WARN_ON(!event);
xa_val_level2 = xa_load(&event->object_ids,
key_level2);
if (list_empty(&xa_val_level2->obj_sub_list)) {
xa_erase(&event->object_ids,
key_level2);
kfree_rcu(xa_val_level2, rcu);
}
}
static int
subscribe_event_xa_alloc(struct mlx5_devx_event_table *devx_event_table,
u32 key_level1,
bool is_level2,
u32 key_level2)
{
struct devx_obj_event *obj_event;
struct devx_event *event;
int err;
event = xa_load(&devx_event_table->event_xa, key_level1);
if (!event) {
event = kzalloc(sizeof(*event), GFP_KERNEL);
if (!event)
return -ENOMEM;
INIT_LIST_HEAD(&event->unaffiliated_list);
xa_init(&event->object_ids);
err = xa_insert(&devx_event_table->event_xa,
key_level1,
event,
GFP_KERNEL);
if (err) {
kfree(event);
return err;
}
}
if (!is_level2)
return 0;
obj_event = xa_load(&event->object_ids, key_level2);
if (!obj_event) {
obj_event = kzalloc(sizeof(*obj_event), GFP_KERNEL);
if (!obj_event)
/* Level1 is valid for future use, no need to free */
return -ENOMEM;
err = xa_insert(&event->object_ids,
key_level2,
obj_event,
GFP_KERNEL);
if (err)
return err;
INIT_LIST_HEAD(&obj_event->obj_sub_list);
}
return 0;
}
static bool is_valid_events_legacy(int num_events, u16 *event_type_num_list,
struct devx_obj *obj)
{
int i;
for (i = 0; i < num_events; i++) {
if (obj) {
if (!is_legacy_obj_event_num(event_type_num_list[i]))
return false;
} else if (!is_legacy_unaffiliated_event_num(
event_type_num_list[i])) {
return false;
}
}
return true;
}
#define MAX_SUPP_EVENT_NUM 255
static bool is_valid_events(struct mlx5_core_dev *dev,
int num_events, u16 *event_type_num_list,
struct devx_obj *obj)
{
__be64 *aff_events;
__be64 *unaff_events;
int mask_entry;
int mask_bit;
int i;
if (MLX5_CAP_GEN(dev, event_cap)) {
aff_events = MLX5_CAP_DEV_EVENT(dev,
user_affiliated_events);
unaff_events = MLX5_CAP_DEV_EVENT(dev,
user_unaffiliated_events);
} else {
return is_valid_events_legacy(num_events, event_type_num_list,
obj);
}
for (i = 0; i < num_events; i++) {
if (event_type_num_list[i] > MAX_SUPP_EVENT_NUM)
return false;
mask_entry = event_type_num_list[i] / 64;
mask_bit = event_type_num_list[i] % 64;
if (obj) {
/* CQ completion */
if (event_type_num_list[i] == 0)
continue;
if (!(be64_to_cpu(aff_events[mask_entry]) &
(1ull << mask_bit)))
return false;
continue;
}
if (!(be64_to_cpu(unaff_events[mask_entry]) &
(1ull << mask_bit)))
return false;
}
return true;
}
#define MAX_NUM_EVENTS 16
static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_SUBSCRIBE_EVENT)(
struct uverbs_attr_bundle *attrs)
{
struct ib_uobject *devx_uobj = uverbs_attr_get_uobject(
attrs,
MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_OBJ_HANDLE);
struct mlx5_ib_ucontext *c = rdma_udata_to_drv_context(
&attrs->driver_udata, struct mlx5_ib_ucontext, ibucontext);
struct mlx5_ib_dev *dev = to_mdev(c->ibucontext.device);
struct ib_uobject *fd_uobj;
struct devx_obj *obj = NULL;
struct devx_async_event_file *ev_file;
struct mlx5_devx_event_table *devx_event_table = &dev->devx_event_table;
u16 *event_type_num_list;
struct devx_event_subscription *event_sub, *tmp_sub;
struct list_head sub_list;
int redirect_fd;
bool use_eventfd = false;
int num_events;
int num_alloc_xa_entries = 0;
u16 obj_type = 0;
u64 cookie = 0;
u32 obj_id = 0;
int err;
int i;
if (!c->devx_uid)
return -EINVAL;
if (!IS_ERR(devx_uobj)) {
obj = (struct devx_obj *)devx_uobj->object;
if (obj)
obj_id = get_dec_obj_id(obj->obj_id);
}
fd_uobj = uverbs_attr_get_uobject(attrs,
MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_FD_HANDLE);
if (IS_ERR(fd_uobj))
return PTR_ERR(fd_uobj);
ev_file = container_of(fd_uobj, struct devx_async_event_file,
uobj);
if (uverbs_attr_is_valid(attrs,
MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_FD_NUM)) {
err = uverbs_copy_from(&redirect_fd, attrs,
MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_FD_NUM);
if (err)
return err;
use_eventfd = true;
}
if (uverbs_attr_is_valid(attrs,
MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_COOKIE)) {
if (use_eventfd)
return -EINVAL;
err = uverbs_copy_from(&cookie, attrs,
MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_COOKIE);
if (err)
return err;
}
num_events = uverbs_attr_ptr_get_array_size(
attrs, MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_TYPE_NUM_LIST,
sizeof(u16));
if (num_events < 0)
return num_events;
if (num_events > MAX_NUM_EVENTS)
return -EINVAL;
event_type_num_list = uverbs_attr_get_alloced_ptr(attrs,
MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_TYPE_NUM_LIST);
if (!is_valid_events(dev->mdev, num_events, event_type_num_list, obj))
return -EINVAL;
INIT_LIST_HEAD(&sub_list);
/* Protect from concurrent subscriptions to same XA entries to allow
* both to succeed
*/
mutex_lock(&devx_event_table->event_xa_lock);
for (i = 0; i < num_events; i++) {
u32 key_level1;
if (obj)
obj_type = get_dec_obj_type(obj,
event_type_num_list[i]);
key_level1 = event_type_num_list[i] | obj_type << 16;
err = subscribe_event_xa_alloc(devx_event_table,
key_level1,
obj,
obj_id);
if (err)
goto err;
num_alloc_xa_entries++;
event_sub = kzalloc(sizeof(*event_sub), GFP_KERNEL);
if (!event_sub)
goto err;
list_add_tail(&event_sub->event_list, &sub_list);
uverbs_uobject_get(&ev_file->uobj);
if (use_eventfd) {
event_sub->eventfd =
eventfd_ctx_fdget(redirect_fd);
if (IS_ERR(event_sub->eventfd)) {
err = PTR_ERR(event_sub->eventfd);
event_sub->eventfd = NULL;
goto err;
}
}
event_sub->cookie = cookie;
event_sub->ev_file = ev_file;
/* May be needed upon cleanup the devx object/subscription */
event_sub->xa_key_level1 = key_level1;
event_sub->xa_key_level2 = obj_id;
INIT_LIST_HEAD(&event_sub->obj_list);
}
/* Once all the allocations and the XA data insertions were done we
* can go ahead and add all the subscriptions to the relevant lists
* without concern of a failure.
*/
list_for_each_entry_safe(event_sub, tmp_sub, &sub_list, event_list) {
struct devx_event *event;
struct devx_obj_event *obj_event;
list_del_init(&event_sub->event_list);
spin_lock_irq(&ev_file->lock);
list_add_tail_rcu(&event_sub->file_list,
&ev_file->subscribed_events_list);
spin_unlock_irq(&ev_file->lock);
event = xa_load(&devx_event_table->event_xa,
event_sub->xa_key_level1);
WARN_ON(!event);
if (!obj) {
list_add_tail_rcu(&event_sub->xa_list,
&event->unaffiliated_list);
continue;
}
obj_event = xa_load(&event->object_ids, obj_id);
WARN_ON(!obj_event);
list_add_tail_rcu(&event_sub->xa_list,
&obj_event->obj_sub_list);
list_add_tail_rcu(&event_sub->obj_list,
&obj->event_sub);
}
mutex_unlock(&devx_event_table->event_xa_lock);
return 0;
err:
list_for_each_entry_safe(event_sub, tmp_sub, &sub_list, event_list) {
list_del(&event_sub->event_list);
subscribe_event_xa_dealloc(devx_event_table,
event_sub->xa_key_level1,
obj,
obj_id);
if (event_sub->eventfd)
eventfd_ctx_put(event_sub->eventfd);
uverbs_uobject_put(&event_sub->ev_file->uobj);
kfree(event_sub);
}
mutex_unlock(&devx_event_table->event_xa_lock);
return err;
}
static int devx_umem_get(struct mlx5_ib_dev *dev, struct ib_ucontext *ucontext,
struct uverbs_attr_bundle *attrs,
struct devx_umem *obj)
{
u64 addr;
size_t size;
u32 access;
int npages;
int err;
u32 page_mask;
if (uverbs_copy_from(&addr, attrs, MLX5_IB_ATTR_DEVX_UMEM_REG_ADDR) ||
uverbs_copy_from(&size, attrs, MLX5_IB_ATTR_DEVX_UMEM_REG_LEN))
return -EFAULT;
err = uverbs_get_flags32(&access, attrs,
MLX5_IB_ATTR_DEVX_UMEM_REG_ACCESS,
IB_ACCESS_LOCAL_WRITE |
IB_ACCESS_REMOTE_WRITE |
IB_ACCESS_REMOTE_READ);
if (err)
return err;
err = ib_check_mr_access(access);
if (err)
return err;
obj->umem = ib_umem_get(&dev->ib_dev, addr, size, access);
if (IS_ERR(obj->umem))
return PTR_ERR(obj->umem);
mlx5_ib_cont_pages(obj->umem, obj->umem->address,
MLX5_MKEY_PAGE_SHIFT_MASK, &npages,
&obj->page_shift, &obj->ncont, NULL);
if (!npages) {
ib_umem_release(obj->umem);
return -EINVAL;
}
page_mask = (1 << obj->page_shift) - 1;
obj->page_offset = obj->umem->address & page_mask;
return 0;
}
static int devx_umem_reg_cmd_alloc(struct uverbs_attr_bundle *attrs,
struct devx_umem *obj,
struct devx_umem_reg_cmd *cmd)
{
cmd->inlen = MLX5_ST_SZ_BYTES(create_umem_in) +
(MLX5_ST_SZ_BYTES(mtt) * obj->ncont);
cmd->in = uverbs_zalloc(attrs, cmd->inlen);
return PTR_ERR_OR_ZERO(cmd->in);
}
static void devx_umem_reg_cmd_build(struct mlx5_ib_dev *dev,
struct devx_umem *obj,
struct devx_umem_reg_cmd *cmd)
{
void *umem;
__be64 *mtt;
umem = MLX5_ADDR_OF(create_umem_in, cmd->in, umem);
mtt = (__be64 *)MLX5_ADDR_OF(umem, umem, mtt);
MLX5_SET(create_umem_in, cmd->in, opcode, MLX5_CMD_OP_CREATE_UMEM);
MLX5_SET64(umem, umem, num_of_mtt, obj->ncont);
MLX5_SET(umem, umem, log_page_size, obj->page_shift -
MLX5_ADAPTER_PAGE_SHIFT);
MLX5_SET(umem, umem, page_offset, obj->page_offset);
mlx5_ib_populate_pas(dev, obj->umem, obj->page_shift, mtt,
(obj->umem->writable ? MLX5_IB_MTT_WRITE : 0) |
MLX5_IB_MTT_READ);
}
static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_UMEM_REG)(
struct uverbs_attr_bundle *attrs)
{
struct devx_umem_reg_cmd cmd;
struct devx_umem *obj;
struct ib_uobject *uobj = uverbs_attr_get_uobject(
attrs, MLX5_IB_ATTR_DEVX_UMEM_REG_HANDLE);
u32 obj_id;
struct mlx5_ib_ucontext *c = rdma_udata_to_drv_context(
&attrs->driver_udata, struct mlx5_ib_ucontext, ibucontext);
struct mlx5_ib_dev *dev = to_mdev(c->ibucontext.device);
int err;
if (!c->devx_uid)
return -EINVAL;
obj = kzalloc(sizeof(struct devx_umem), GFP_KERNEL);
if (!obj)
return -ENOMEM;
err = devx_umem_get(dev, &c->ibucontext, attrs, obj);
if (err)
goto err_obj_free;
err = devx_umem_reg_cmd_alloc(attrs, obj, &cmd);
if (err)
goto err_umem_release;
devx_umem_reg_cmd_build(dev, obj, &cmd);
MLX5_SET(create_umem_in, cmd.in, uid, c->devx_uid);
err = mlx5_cmd_exec(dev->mdev, cmd.in, cmd.inlen, cmd.out,
sizeof(cmd.out));
if (err)
goto err_umem_release;
obj->mdev = dev->mdev;
uobj->object = obj;
devx_obj_build_destroy_cmd(cmd.in, cmd.out, obj->dinbox, &obj->dinlen, &obj_id);
err = uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_UMEM_REG_OUT_ID, &obj_id, sizeof(obj_id));
if (err)
goto err_umem_destroy;
return 0;
err_umem_destroy:
mlx5_cmd_exec(obj->mdev, obj->dinbox, obj->dinlen, cmd.out, sizeof(cmd.out));
err_umem_release:
ib_umem_release(obj->umem);
err_obj_free:
kfree(obj);
return err;
}
static int devx_umem_cleanup(struct ib_uobject *uobject,
enum rdma_remove_reason why,
struct uverbs_attr_bundle *attrs)
{
struct devx_umem *obj = uobject->object;
u32 out[MLX5_ST_SZ_DW(general_obj_out_cmd_hdr)];
int err;
err = mlx5_cmd_exec(obj->mdev, obj->dinbox, obj->dinlen, out, sizeof(out));
if (ib_is_destroy_retryable(err, why, uobject))
return err;
ib_umem_release(obj->umem);
kfree(obj);
return 0;
}
static bool is_unaffiliated_event(struct mlx5_core_dev *dev,
unsigned long event_type)
{
__be64 *unaff_events;
int mask_entry;
int mask_bit;
if (!MLX5_CAP_GEN(dev, event_cap))
return is_legacy_unaffiliated_event_num(event_type);
unaff_events = MLX5_CAP_DEV_EVENT(dev,
user_unaffiliated_events);
WARN_ON(event_type > MAX_SUPP_EVENT_NUM);
mask_entry = event_type / 64;
mask_bit = event_type % 64;
if (!(be64_to_cpu(unaff_events[mask_entry]) & (1ull << mask_bit)))
return false;
return true;
}
static u32 devx_get_obj_id_from_event(unsigned long event_type, void *data)
{
struct mlx5_eqe *eqe = data;
u32 obj_id = 0;
switch (event_type) {
case MLX5_EVENT_TYPE_SRQ_CATAS_ERROR:
case MLX5_EVENT_TYPE_SRQ_RQ_LIMIT:
case MLX5_EVENT_TYPE_PATH_MIG:
case MLX5_EVENT_TYPE_COMM_EST:
case MLX5_EVENT_TYPE_SQ_DRAINED:
case MLX5_EVENT_TYPE_SRQ_LAST_WQE:
case MLX5_EVENT_TYPE_WQ_CATAS_ERROR:
case MLX5_EVENT_TYPE_PATH_MIG_FAILED:
case MLX5_EVENT_TYPE_WQ_INVAL_REQ_ERROR:
case MLX5_EVENT_TYPE_WQ_ACCESS_ERROR:
obj_id = be32_to_cpu(eqe->data.qp_srq.qp_srq_n) & 0xffffff;
break;
case MLX5_EVENT_TYPE_XRQ_ERROR:
obj_id = be32_to_cpu(eqe->data.xrq_err.type_xrqn) & 0xffffff;
break;
case MLX5_EVENT_TYPE_DCT_DRAINED:
case MLX5_EVENT_TYPE_DCT_KEY_VIOLATION:
obj_id = be32_to_cpu(eqe->data.dct.dctn) & 0xffffff;
break;
case MLX5_EVENT_TYPE_CQ_ERROR:
obj_id = be32_to_cpu(eqe->data.cq_err.cqn) & 0xffffff;
break;
default:
obj_id = MLX5_GET(affiliated_event_header, &eqe->data, obj_id);
break;
}
return obj_id;
}
static int deliver_event(struct devx_event_subscription *event_sub,
const void *data)
{
struct devx_async_event_file *ev_file;
struct devx_async_event_data *event_data;
unsigned long flags;
ev_file = event_sub->ev_file;
if (ev_file->omit_data) {
spin_lock_irqsave(&ev_file->lock, flags);
if (!list_empty(&event_sub->event_list) ||
ev_file->is_destroyed) {
spin_unlock_irqrestore(&ev_file->lock, flags);
return 0;
}
list_add_tail(&event_sub->event_list, &ev_file->event_list);
spin_unlock_irqrestore(&ev_file->lock, flags);
wake_up_interruptible(&ev_file->poll_wait);
return 0;
}
event_data = kzalloc(sizeof(*event_data) + sizeof(struct mlx5_eqe),
GFP_ATOMIC);
if (!event_data) {
spin_lock_irqsave(&ev_file->lock, flags);
ev_file->is_overflow_err = 1;
spin_unlock_irqrestore(&ev_file->lock, flags);
return -ENOMEM;
}
event_data->hdr.cookie = event_sub->cookie;
memcpy(event_data->hdr.out_data, data, sizeof(struct mlx5_eqe));
spin_lock_irqsave(&ev_file->lock, flags);
if (!ev_file->is_destroyed)
list_add_tail(&event_data->list, &ev_file->event_list);
else
kfree(event_data);
spin_unlock_irqrestore(&ev_file->lock, flags);
wake_up_interruptible(&ev_file->poll_wait);
return 0;
}
static void dispatch_event_fd(struct list_head *fd_list,
const void *data)
{
struct devx_event_subscription *item;
list_for_each_entry_rcu(item, fd_list, xa_list) {
if (item->eventfd)
eventfd_signal(item->eventfd, 1);
else
deliver_event(item, data);
}
}
static int devx_event_notifier(struct notifier_block *nb,
unsigned long event_type, void *data)
{
struct mlx5_devx_event_table *table;
struct mlx5_ib_dev *dev;
struct devx_event *event;
struct devx_obj_event *obj_event;
u16 obj_type = 0;
bool is_unaffiliated;
u32 obj_id;
/* Explicit filtering to kernel events which may occur frequently */
if (event_type == MLX5_EVENT_TYPE_CMD ||
event_type == MLX5_EVENT_TYPE_PAGE_REQUEST)
return NOTIFY_OK;
table = container_of(nb, struct mlx5_devx_event_table, devx_nb.nb);
dev = container_of(table, struct mlx5_ib_dev, devx_event_table);
is_unaffiliated = is_unaffiliated_event(dev->mdev, event_type);
if (!is_unaffiliated)
obj_type = get_event_obj_type(event_type, data);
rcu_read_lock();
event = xa_load(&table->event_xa, event_type | (obj_type << 16));
if (!event) {
rcu_read_unlock();
return NOTIFY_DONE;
}
if (is_unaffiliated) {
dispatch_event_fd(&event->unaffiliated_list, data);
rcu_read_unlock();
return NOTIFY_OK;
}
obj_id = devx_get_obj_id_from_event(event_type, data);
obj_event = xa_load(&event->object_ids, obj_id);
if (!obj_event) {
rcu_read_unlock();
return NOTIFY_DONE;
}
dispatch_event_fd(&obj_event->obj_sub_list, data);
rcu_read_unlock();
return NOTIFY_OK;
}
void mlx5_ib_devx_init_event_table(struct mlx5_ib_dev *dev)
{
struct mlx5_devx_event_table *table = &dev->devx_event_table;
xa_init(&table->event_xa);
mutex_init(&table->event_xa_lock);
MLX5_NB_INIT(&table->devx_nb, devx_event_notifier, NOTIFY_ANY);
mlx5_eq_notifier_register(dev->mdev, &table->devx_nb);
}
void mlx5_ib_devx_cleanup_event_table(struct mlx5_ib_dev *dev)
{
struct mlx5_devx_event_table *table = &dev->devx_event_table;
struct devx_event_subscription *sub, *tmp;
struct devx_event *event;
void *entry;
unsigned long id;
mlx5_eq_notifier_unregister(dev->mdev, &table->devx_nb);
mutex_lock(&dev->devx_event_table.event_xa_lock);
xa_for_each(&table->event_xa, id, entry) {
event = entry;
list_for_each_entry_safe(sub, tmp, &event->unaffiliated_list,
xa_list)
devx_cleanup_subscription(dev, sub);
kfree(entry);
}
mutex_unlock(&dev->devx_event_table.event_xa_lock);
xa_destroy(&table->event_xa);
}
static ssize_t devx_async_cmd_event_read(struct file *filp, char __user *buf,
size_t count, loff_t *pos)
{
struct devx_async_cmd_event_file *comp_ev_file = filp->private_data;
struct devx_async_event_queue *ev_queue = &comp_ev_file->ev_queue;
struct devx_async_data *event;
int ret = 0;
size_t eventsz;
spin_lock_irq(&ev_queue->lock);
while (list_empty(&ev_queue->event_list)) {
spin_unlock_irq(&ev_queue->lock);
if (filp->f_flags & O_NONBLOCK)
return -EAGAIN;
if (wait_event_interruptible(
ev_queue->poll_wait,
(!list_empty(&ev_queue->event_list) ||
ev_queue->is_destroyed))) {
return -ERESTARTSYS;
}
spin_lock_irq(&ev_queue->lock);
if (ev_queue->is_destroyed) {
spin_unlock_irq(&ev_queue->lock);
return -EIO;
}
}
event = list_entry(ev_queue->event_list.next,
struct devx_async_data, list);
eventsz = event->cmd_out_len +
sizeof(struct mlx5_ib_uapi_devx_async_cmd_hdr);
if (eventsz > count) {
spin_unlock_irq(&ev_queue->lock);
return -ENOSPC;
}
list_del(ev_queue->event_list.next);
spin_unlock_irq(&ev_queue->lock);
if (copy_to_user(buf, &event->hdr, eventsz))
ret = -EFAULT;
else
ret = eventsz;
atomic_sub(event->cmd_out_len, &ev_queue->bytes_in_use);
kvfree(event);
return ret;
}
static __poll_t devx_async_cmd_event_poll(struct file *filp,
struct poll_table_struct *wait)
{
struct devx_async_cmd_event_file *comp_ev_file = filp->private_data;
struct devx_async_event_queue *ev_queue = &comp_ev_file->ev_queue;
__poll_t pollflags = 0;
poll_wait(filp, &ev_queue->poll_wait, wait);
spin_lock_irq(&ev_queue->lock);
if (ev_queue->is_destroyed)
pollflags = EPOLLIN | EPOLLRDNORM | EPOLLRDHUP;
else if (!list_empty(&ev_queue->event_list))
pollflags = EPOLLIN | EPOLLRDNORM;
spin_unlock_irq(&ev_queue->lock);
return pollflags;
}
static const struct file_operations devx_async_cmd_event_fops = {
.owner = THIS_MODULE,
.read = devx_async_cmd_event_read,
.poll = devx_async_cmd_event_poll,
.release = uverbs_uobject_fd_release,
.llseek = no_llseek,
};
static ssize_t devx_async_event_read(struct file *filp, char __user *buf,
size_t count, loff_t *pos)
{
struct devx_async_event_file *ev_file = filp->private_data;
struct devx_event_subscription *event_sub;
struct devx_async_event_data *uninitialized_var(event);
int ret = 0;
size_t eventsz;
bool omit_data;
void *event_data;
omit_data = ev_file->omit_data;
spin_lock_irq(&ev_file->lock);
if (ev_file->is_overflow_err) {
ev_file->is_overflow_err = 0;
spin_unlock_irq(&ev_file->lock);
return -EOVERFLOW;
}
while (list_empty(&ev_file->event_list)) {
spin_unlock_irq(&ev_file->lock);
if (filp->f_flags & O_NONBLOCK)
return -EAGAIN;
if (wait_event_interruptible(ev_file->poll_wait,
(!list_empty(&ev_file->event_list) ||
ev_file->is_destroyed))) {
return -ERESTARTSYS;
}
spin_lock_irq(&ev_file->lock);
if (ev_file->is_destroyed) {
spin_unlock_irq(&ev_file->lock);
return -EIO;
}
}
if (omit_data) {
event_sub = list_first_entry(&ev_file->event_list,
struct devx_event_subscription,
event_list);
eventsz = sizeof(event_sub->cookie);
event_data = &event_sub->cookie;
} else {
event = list_first_entry(&ev_file->event_list,
struct devx_async_event_data, list);
eventsz = sizeof(struct mlx5_eqe) +
sizeof(struct mlx5_ib_uapi_devx_async_event_hdr);
event_data = &event->hdr;
}
if (eventsz > count) {
spin_unlock_irq(&ev_file->lock);
return -EINVAL;
}
if (omit_data)
list_del_init(&event_sub->event_list);
else
list_del(&event->list);
spin_unlock_irq(&ev_file->lock);
if (copy_to_user(buf, event_data, eventsz))
/* This points to an application issue, not a kernel concern */
ret = -EFAULT;
else
ret = eventsz;
if (!omit_data)
kfree(event);
return ret;
}
static __poll_t devx_async_event_poll(struct file *filp,
struct poll_table_struct *wait)
{
struct devx_async_event_file *ev_file = filp->private_data;
__poll_t pollflags = 0;
poll_wait(filp, &ev_file->poll_wait, wait);
spin_lock_irq(&ev_file->lock);
if (ev_file->is_destroyed)
pollflags = EPOLLIN | EPOLLRDNORM | EPOLLRDHUP;
else if (!list_empty(&ev_file->event_list))
pollflags = EPOLLIN | EPOLLRDNORM;
spin_unlock_irq(&ev_file->lock);
return pollflags;
}
static void devx_free_subscription(struct rcu_head *rcu)
{
struct devx_event_subscription *event_sub =
container_of(rcu, struct devx_event_subscription, rcu);
if (event_sub->eventfd)
eventfd_ctx_put(event_sub->eventfd);
uverbs_uobject_put(&event_sub->ev_file->uobj);
kfree(event_sub);
}
static const struct file_operations devx_async_event_fops = {
.owner = THIS_MODULE,
.read = devx_async_event_read,
.poll = devx_async_event_poll,
.release = uverbs_uobject_fd_release,
.llseek = no_llseek,
};
static int devx_async_cmd_event_destroy_uobj(struct ib_uobject *uobj,
enum rdma_remove_reason why)
{
struct devx_async_cmd_event_file *comp_ev_file =
container_of(uobj, struct devx_async_cmd_event_file,
uobj);
struct devx_async_event_queue *ev_queue = &comp_ev_file->ev_queue;
struct devx_async_data *entry, *tmp;
spin_lock_irq(&ev_queue->lock);
ev_queue->is_destroyed = 1;
spin_unlock_irq(&ev_queue->lock);
wake_up_interruptible(&ev_queue->poll_wait);
mlx5_cmd_cleanup_async_ctx(&comp_ev_file->async_ctx);
spin_lock_irq(&comp_ev_file->ev_queue.lock);
list_for_each_entry_safe(entry, tmp,
&comp_ev_file->ev_queue.event_list, list) {
list_del(&entry->list);
kvfree(entry);
}
spin_unlock_irq(&comp_ev_file->ev_queue.lock);
return 0;
};
static int devx_async_event_destroy_uobj(struct ib_uobject *uobj,
enum rdma_remove_reason why)
{
struct devx_async_event_file *ev_file =
container_of(uobj, struct devx_async_event_file,
uobj);
struct devx_event_subscription *event_sub, *event_sub_tmp;
struct mlx5_ib_dev *dev = ev_file->dev;
spin_lock_irq(&ev_file->lock);
ev_file->is_destroyed = 1;
/* free the pending events allocation */
if (ev_file->omit_data) {
struct devx_event_subscription *event_sub, *tmp;
list_for_each_entry_safe(event_sub, tmp, &ev_file->event_list,
event_list)
list_del_init(&event_sub->event_list);
} else {
struct devx_async_event_data *entry, *tmp;
list_for_each_entry_safe(entry, tmp, &ev_file->event_list,
list) {
list_del(&entry->list);
kfree(entry);
}
}
spin_unlock_irq(&ev_file->lock);
wake_up_interruptible(&ev_file->poll_wait);
mutex_lock(&dev->devx_event_table.event_xa_lock);
/* delete the subscriptions which are related to this FD */
list_for_each_entry_safe(event_sub, event_sub_tmp,
&ev_file->subscribed_events_list, file_list) {
devx_cleanup_subscription(dev, event_sub);
list_del_rcu(&event_sub->file_list);
/* subscription may not be used by the read API any more */
call_rcu(&event_sub->rcu, devx_free_subscription);
}
mutex_unlock(&dev->devx_event_table.event_xa_lock);
put_device(&dev->ib_dev.dev);
return 0;
};
DECLARE_UVERBS_NAMED_METHOD(
MLX5_IB_METHOD_DEVX_UMEM_REG,
UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_UMEM_REG_HANDLE,
MLX5_IB_OBJECT_DEVX_UMEM,
UVERBS_ACCESS_NEW,
UA_MANDATORY),
UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_UMEM_REG_ADDR,
UVERBS_ATTR_TYPE(u64),
UA_MANDATORY),
UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_UMEM_REG_LEN,
UVERBS_ATTR_TYPE(u64),
UA_MANDATORY),
UVERBS_ATTR_FLAGS_IN(MLX5_IB_ATTR_DEVX_UMEM_REG_ACCESS,
enum ib_access_flags),
UVERBS_ATTR_PTR_OUT(MLX5_IB_ATTR_DEVX_UMEM_REG_OUT_ID,
UVERBS_ATTR_TYPE(u32),
UA_MANDATORY));
DECLARE_UVERBS_NAMED_METHOD_DESTROY(
MLX5_IB_METHOD_DEVX_UMEM_DEREG,
UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_UMEM_DEREG_HANDLE,
MLX5_IB_OBJECT_DEVX_UMEM,
UVERBS_ACCESS_DESTROY,
UA_MANDATORY));
DECLARE_UVERBS_NAMED_METHOD(
MLX5_IB_METHOD_DEVX_QUERY_EQN,
UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_QUERY_EQN_USER_VEC,
UVERBS_ATTR_TYPE(u32),
UA_MANDATORY),
UVERBS_ATTR_PTR_OUT(MLX5_IB_ATTR_DEVX_QUERY_EQN_DEV_EQN,
UVERBS_ATTR_TYPE(u32),
UA_MANDATORY));
DECLARE_UVERBS_NAMED_METHOD(
MLX5_IB_METHOD_DEVX_QUERY_UAR,
UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_QUERY_UAR_USER_IDX,
UVERBS_ATTR_TYPE(u32),
UA_MANDATORY),
UVERBS_ATTR_PTR_OUT(MLX5_IB_ATTR_DEVX_QUERY_UAR_DEV_IDX,
UVERBS_ATTR_TYPE(u32),
UA_MANDATORY));
DECLARE_UVERBS_NAMED_METHOD(
MLX5_IB_METHOD_DEVX_OTHER,
UVERBS_ATTR_PTR_IN(
MLX5_IB_ATTR_DEVX_OTHER_CMD_IN,
UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_in_cmd_hdr)),
UA_MANDATORY,
UA_ALLOC_AND_COPY),
UVERBS_ATTR_PTR_OUT(
MLX5_IB_ATTR_DEVX_OTHER_CMD_OUT,
UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_out_cmd_hdr)),
UA_MANDATORY));
DECLARE_UVERBS_NAMED_METHOD(
MLX5_IB_METHOD_DEVX_OBJ_CREATE,
UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_OBJ_CREATE_HANDLE,
MLX5_IB_OBJECT_DEVX_OBJ,
UVERBS_ACCESS_NEW,
UA_MANDATORY),
UVERBS_ATTR_PTR_IN(
MLX5_IB_ATTR_DEVX_OBJ_CREATE_CMD_IN,
UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_in_cmd_hdr)),
UA_MANDATORY,
UA_ALLOC_AND_COPY),
UVERBS_ATTR_PTR_OUT(
MLX5_IB_ATTR_DEVX_OBJ_CREATE_CMD_OUT,
UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_out_cmd_hdr)),
UA_MANDATORY));
DECLARE_UVERBS_NAMED_METHOD_DESTROY(
MLX5_IB_METHOD_DEVX_OBJ_DESTROY,
UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_OBJ_DESTROY_HANDLE,
MLX5_IB_OBJECT_DEVX_OBJ,
UVERBS_ACCESS_DESTROY,
UA_MANDATORY));
DECLARE_UVERBS_NAMED_METHOD(
MLX5_IB_METHOD_DEVX_OBJ_MODIFY,
UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_OBJ_MODIFY_HANDLE,
UVERBS_IDR_ANY_OBJECT,
UVERBS_ACCESS_WRITE,
UA_MANDATORY),
UVERBS_ATTR_PTR_IN(
MLX5_IB_ATTR_DEVX_OBJ_MODIFY_CMD_IN,
UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_in_cmd_hdr)),
UA_MANDATORY,
UA_ALLOC_AND_COPY),
UVERBS_ATTR_PTR_OUT(
MLX5_IB_ATTR_DEVX_OBJ_MODIFY_CMD_OUT,
UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_out_cmd_hdr)),
UA_MANDATORY));
DECLARE_UVERBS_NAMED_METHOD(
MLX5_IB_METHOD_DEVX_OBJ_QUERY,
UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_OBJ_QUERY_HANDLE,
UVERBS_IDR_ANY_OBJECT,
UVERBS_ACCESS_READ,
UA_MANDATORY),
UVERBS_ATTR_PTR_IN(
MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_IN,
UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_in_cmd_hdr)),
UA_MANDATORY,
UA_ALLOC_AND_COPY),
UVERBS_ATTR_PTR_OUT(
MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_OUT,
UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_out_cmd_hdr)),
UA_MANDATORY));
DECLARE_UVERBS_NAMED_METHOD(
MLX5_IB_METHOD_DEVX_OBJ_ASYNC_QUERY,
UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_OBJ_QUERY_HANDLE,
UVERBS_IDR_ANY_OBJECT,
UVERBS_ACCESS_READ,
UA_MANDATORY),
UVERBS_ATTR_PTR_IN(
MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_IN,
UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_in_cmd_hdr)),
UA_MANDATORY,
UA_ALLOC_AND_COPY),
UVERBS_ATTR_CONST_IN(MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_OUT_LEN,
u16, UA_MANDATORY),
UVERBS_ATTR_FD(MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_FD,
MLX5_IB_OBJECT_DEVX_ASYNC_CMD_FD,
UVERBS_ACCESS_READ,
UA_MANDATORY),
UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_WR_ID,
UVERBS_ATTR_TYPE(u64),
UA_MANDATORY));
DECLARE_UVERBS_NAMED_METHOD(
MLX5_IB_METHOD_DEVX_SUBSCRIBE_EVENT,
UVERBS_ATTR_FD(MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_FD_HANDLE,
MLX5_IB_OBJECT_DEVX_ASYNC_EVENT_FD,
UVERBS_ACCESS_READ,
UA_MANDATORY),
UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_OBJ_HANDLE,
MLX5_IB_OBJECT_DEVX_OBJ,
UVERBS_ACCESS_READ,
UA_OPTIONAL),
UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_TYPE_NUM_LIST,
UVERBS_ATTR_MIN_SIZE(sizeof(u16)),
UA_MANDATORY,
UA_ALLOC_AND_COPY),
UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_COOKIE,
UVERBS_ATTR_TYPE(u64),
UA_OPTIONAL),
UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_FD_NUM,
UVERBS_ATTR_TYPE(u32),
UA_OPTIONAL));
DECLARE_UVERBS_GLOBAL_METHODS(MLX5_IB_OBJECT_DEVX,
&UVERBS_METHOD(MLX5_IB_METHOD_DEVX_OTHER),
&UVERBS_METHOD(MLX5_IB_METHOD_DEVX_QUERY_UAR),
&UVERBS_METHOD(MLX5_IB_METHOD_DEVX_QUERY_EQN),
&UVERBS_METHOD(MLX5_IB_METHOD_DEVX_SUBSCRIBE_EVENT));
DECLARE_UVERBS_NAMED_OBJECT(MLX5_IB_OBJECT_DEVX_OBJ,
UVERBS_TYPE_ALLOC_IDR(devx_obj_cleanup),
&UVERBS_METHOD(MLX5_IB_METHOD_DEVX_OBJ_CREATE),
&UVERBS_METHOD(MLX5_IB_METHOD_DEVX_OBJ_DESTROY),
&UVERBS_METHOD(MLX5_IB_METHOD_DEVX_OBJ_MODIFY),
&UVERBS_METHOD(MLX5_IB_METHOD_DEVX_OBJ_QUERY),
&UVERBS_METHOD(MLX5_IB_METHOD_DEVX_OBJ_ASYNC_QUERY));
DECLARE_UVERBS_NAMED_OBJECT(MLX5_IB_OBJECT_DEVX_UMEM,
UVERBS_TYPE_ALLOC_IDR(devx_umem_cleanup),
&UVERBS_METHOD(MLX5_IB_METHOD_DEVX_UMEM_REG),
&UVERBS_METHOD(MLX5_IB_METHOD_DEVX_UMEM_DEREG));
DECLARE_UVERBS_NAMED_METHOD(
MLX5_IB_METHOD_DEVX_ASYNC_CMD_FD_ALLOC,
UVERBS_ATTR_FD(MLX5_IB_ATTR_DEVX_ASYNC_CMD_FD_ALLOC_HANDLE,
MLX5_IB_OBJECT_DEVX_ASYNC_CMD_FD,
UVERBS_ACCESS_NEW,
UA_MANDATORY));
DECLARE_UVERBS_NAMED_OBJECT(
MLX5_IB_OBJECT_DEVX_ASYNC_CMD_FD,
UVERBS_TYPE_ALLOC_FD(sizeof(struct devx_async_cmd_event_file),
devx_async_cmd_event_destroy_uobj,
&devx_async_cmd_event_fops, "[devx_async_cmd]",
O_RDONLY),
&UVERBS_METHOD(MLX5_IB_METHOD_DEVX_ASYNC_CMD_FD_ALLOC));
DECLARE_UVERBS_NAMED_METHOD(
MLX5_IB_METHOD_DEVX_ASYNC_EVENT_FD_ALLOC,
UVERBS_ATTR_FD(MLX5_IB_ATTR_DEVX_ASYNC_EVENT_FD_ALLOC_HANDLE,
MLX5_IB_OBJECT_DEVX_ASYNC_EVENT_FD,
UVERBS_ACCESS_NEW,
UA_MANDATORY),
UVERBS_ATTR_FLAGS_IN(MLX5_IB_ATTR_DEVX_ASYNC_EVENT_FD_ALLOC_FLAGS,
enum mlx5_ib_uapi_devx_create_event_channel_flags,
UA_MANDATORY));
DECLARE_UVERBS_NAMED_OBJECT(
MLX5_IB_OBJECT_DEVX_ASYNC_EVENT_FD,
UVERBS_TYPE_ALLOC_FD(sizeof(struct devx_async_event_file),
devx_async_event_destroy_uobj,
&devx_async_event_fops, "[devx_async_event]",
O_RDONLY),
&UVERBS_METHOD(MLX5_IB_METHOD_DEVX_ASYNC_EVENT_FD_ALLOC));
static bool devx_is_supported(struct ib_device *device)
{
struct mlx5_ib_dev *dev = to_mdev(device);
return MLX5_CAP_GEN(dev->mdev, log_max_uctx);
}
const struct uapi_definition mlx5_ib_devx_defs[] = {
UAPI_DEF_CHAIN_OBJ_TREE_NAMED(
MLX5_IB_OBJECT_DEVX,
UAPI_DEF_IS_OBJ_SUPPORTED(devx_is_supported)),
UAPI_DEF_CHAIN_OBJ_TREE_NAMED(
MLX5_IB_OBJECT_DEVX_OBJ,
UAPI_DEF_IS_OBJ_SUPPORTED(devx_is_supported)),
UAPI_DEF_CHAIN_OBJ_TREE_NAMED(
MLX5_IB_OBJECT_DEVX_UMEM,
UAPI_DEF_IS_OBJ_SUPPORTED(devx_is_supported)),
UAPI_DEF_CHAIN_OBJ_TREE_NAMED(
MLX5_IB_OBJECT_DEVX_ASYNC_CMD_FD,
UAPI_DEF_IS_OBJ_SUPPORTED(devx_is_supported)),
UAPI_DEF_CHAIN_OBJ_TREE_NAMED(
MLX5_IB_OBJECT_DEVX_ASYNC_EVENT_FD,
UAPI_DEF_IS_OBJ_SUPPORTED(devx_is_supported)),
{},
};
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