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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /drivers/infiniband/hw/mlx5/devx.c
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/infiniband/hw/mlx5/devx.c')
-rw-r--r--drivers/infiniband/hw/mlx5/devx.c3099
1 files changed, 3099 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/mlx5/devx.c b/drivers/infiniband/hw/mlx5/devx.c
new file mode 100644
index 0000000000..8ba53edf23
--- /dev/null
+++ b/drivers/infiniband/hw/mlx5/devx.c
@@ -0,0 +1,3099 @@
+// 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 "devx.h"
+#include "qp.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;
+};
+
+struct devx_umem {
+ struct mlx5_core_dev *mdev;
+ struct ib_umem *umem;
+ u32 dinlen;
+ u32 dinbox[MLX5_ST_SZ_DW(destroy_umem_in)];
+};
+
+struct devx_umem_reg_cmd {
+ void *in;
+ u32 inlen;
+ u32 out[MLX5_ST_SZ_DW(create_umem_out)];
+};
+
+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)] = {};
+ u32 out[MLX5_ST_SZ_DW(create_uctx_out)] = {};
+ 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(create_uctx_out, out, uid);
+ return uid;
+}
+
+void mlx5_ib_devx_destroy(struct mlx5_ib_dev *dev, u16 uid)
+{
+ u32 in[MLX5_ST_SZ_DW(destroy_uctx_in)] = {};
+ u32 out[MLX5_ST_SZ_DW(destroy_uctx_out)] = {};
+
+ 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));
+}
+
+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 u32 devx_get_created_obj_id(const void *in, const void *out, u16 opcode)
+{
+ switch (opcode) {
+ case MLX5_CMD_OP_CREATE_GENERAL_OBJECT:
+ return MLX5_GET(general_obj_out_cmd_hdr, out, obj_id);
+ case MLX5_CMD_OP_CREATE_UMEM:
+ return MLX5_GET(create_umem_out, out, umem_id);
+ case MLX5_CMD_OP_CREATE_MKEY:
+ return MLX5_GET(create_mkey_out, out, mkey_index);
+ case MLX5_CMD_OP_CREATE_CQ:
+ return MLX5_GET(create_cq_out, out, cqn);
+ case MLX5_CMD_OP_ALLOC_PD:
+ return MLX5_GET(alloc_pd_out, out, pd);
+ case MLX5_CMD_OP_ALLOC_TRANSPORT_DOMAIN:
+ return MLX5_GET(alloc_transport_domain_out, out,
+ transport_domain);
+ case MLX5_CMD_OP_CREATE_RMP:
+ return MLX5_GET(create_rmp_out, out, rmpn);
+ case MLX5_CMD_OP_CREATE_SQ:
+ return MLX5_GET(create_sq_out, out, sqn);
+ case MLX5_CMD_OP_CREATE_RQ:
+ return MLX5_GET(create_rq_out, out, rqn);
+ case MLX5_CMD_OP_CREATE_RQT:
+ return MLX5_GET(create_rqt_out, out, rqtn);
+ case MLX5_CMD_OP_CREATE_TIR:
+ return MLX5_GET(create_tir_out, out, tirn);
+ case MLX5_CMD_OP_CREATE_TIS:
+ return MLX5_GET(create_tis_out, out, tisn);
+ case MLX5_CMD_OP_ALLOC_Q_COUNTER:
+ return MLX5_GET(alloc_q_counter_out, out, counter_set_id);
+ case MLX5_CMD_OP_CREATE_FLOW_TABLE:
+ return MLX5_GET(create_flow_table_out, out, table_id);
+ case MLX5_CMD_OP_CREATE_FLOW_GROUP:
+ return MLX5_GET(create_flow_group_out, out, group_id);
+ case MLX5_CMD_OP_SET_FLOW_TABLE_ENTRY:
+ return MLX5_GET(set_fte_in, in, flow_index);
+ case MLX5_CMD_OP_ALLOC_FLOW_COUNTER:
+ return MLX5_GET(alloc_flow_counter_out, out, flow_counter_id);
+ case MLX5_CMD_OP_ALLOC_PACKET_REFORMAT_CONTEXT:
+ return MLX5_GET(alloc_packet_reformat_context_out, out,
+ packet_reformat_id);
+ case MLX5_CMD_OP_ALLOC_MODIFY_HEADER_CONTEXT:
+ return MLX5_GET(alloc_modify_header_context_out, out,
+ modify_header_id);
+ case MLX5_CMD_OP_CREATE_SCHEDULING_ELEMENT:
+ return MLX5_GET(create_scheduling_element_out, out,
+ scheduling_element_id);
+ case MLX5_CMD_OP_ADD_VXLAN_UDP_DPORT:
+ return MLX5_GET(add_vxlan_udp_dport_in, in, vxlan_udp_port);
+ case MLX5_CMD_OP_SET_L2_TABLE_ENTRY:
+ return MLX5_GET(set_l2_table_entry_in, in, table_index);
+ case MLX5_CMD_OP_CREATE_QP:
+ return MLX5_GET(create_qp_out, out, qpn);
+ case MLX5_CMD_OP_CREATE_SRQ:
+ return MLX5_GET(create_srq_out, out, srqn);
+ case MLX5_CMD_OP_CREATE_XRC_SRQ:
+ return MLX5_GET(create_xrc_srq_out, out, xrc_srqn);
+ case MLX5_CMD_OP_CREATE_DCT:
+ return MLX5_GET(create_dct_out, out, dctn);
+ case MLX5_CMD_OP_CREATE_XRQ:
+ return MLX5_GET(create_xrq_out, out, xrqn);
+ case MLX5_CMD_OP_ATTACH_TO_MCG:
+ return MLX5_GET(attach_to_mcg_in, in, qpn);
+ case MLX5_CMD_OP_ALLOC_XRCD:
+ return MLX5_GET(alloc_xrcd_out, out, xrcd);
+ case MLX5_CMD_OP_CREATE_PSV:
+ return MLX5_GET(create_psv_out, out, psv0_index);
+ default:
+ /* The entry must match to one of the devx_is_obj_create_cmd */
+ WARN_ON(true);
+ return 0;
+ }
+}
+
+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(query_modify_header_context_in,
+ in, modify_header_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_INIT2INIT_QP:
+ obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_QP,
+ MLX5_GET(init2init_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);
+
+ if (qp->type == IB_QPT_RAW_PACKET ||
+ (qp->flags & IB_QP_CREATE_SOURCE_QPN)) {
+ 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:
+ {
+ u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode);
+ struct devx_obj *devx_uobj = uobj->object;
+
+ if (opcode == MLX5_CMD_OP_QUERY_FLOW_COUNTER &&
+ devx_uobj->flow_counter_bulk_size) {
+ u64 end;
+
+ end = devx_uobj->obj_id +
+ devx_uobj->flow_counter_bulk_size;
+ return devx_uobj->obj_id <= obj_id && end > obj_id;
+ }
+
+ return devx_uobj->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_INIT2INIT_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:
+ case MLX5_CMD_OP_QUERY_ESW_FUNCTIONS:
+ 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:
+ case MLX5_CMD_OP_QUERY_ESW_FUNCTIONS:
+ 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;
+ 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_comp_eqn_get(dev->mdev, user_vector, &dev_eqn);
+ 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, err2;
+ 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_do(dev->mdev, cmd_in,
+ uverbs_attr_get_len(attrs, MLX5_IB_ATTR_DEVX_OTHER_CMD_IN),
+ cmd_out, cmd_out_len);
+ if (err && err != -EREMOTEIO)
+ return err;
+
+ err2 = uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_OTHER_CMD_OUT, cmd_out,
+ cmd_out_len);
+
+ return err2 ?: err;
+}
+
+static void devx_obj_build_destroy_cmd(void *in, void *out, void *din,
+ u32 *dinlen,
+ u32 *obj_id)
+{
+ u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode);
+ u16 uid = MLX5_GET(general_obj_in_cmd_hdr, in, uid);
+
+ *obj_id = devx_get_created_obj_id(in, out, opcode);
+ *dinlen = MLX5_ST_SZ_BYTES(general_obj_in_cmd_hdr);
+ MLX5_SET(general_obj_in_cmd_hdr, din, uid, uid);
+
+ switch (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_id, *obj_id);
+ MLX5_SET(general_obj_in_cmd_hdr, din, obj_type,
+ MLX5_GET(general_obj_in_cmd_hdr, in, obj_type));
+ break;
+
+ case MLX5_CMD_OP_CREATE_UMEM:
+ MLX5_SET(destroy_umem_in, din, opcode,
+ MLX5_CMD_OP_DESTROY_UMEM);
+ MLX5_SET(destroy_umem_in, din, umem_id, *obj_id);
+ break;
+ case MLX5_CMD_OP_CREATE_MKEY:
+ MLX5_SET(destroy_mkey_in, din, opcode,
+ MLX5_CMD_OP_DESTROY_MKEY);
+ MLX5_SET(destroy_mkey_in, din, mkey_index, *obj_id);
+ break;
+ case MLX5_CMD_OP_CREATE_CQ:
+ MLX5_SET(destroy_cq_in, din, opcode, MLX5_CMD_OP_DESTROY_CQ);
+ MLX5_SET(destroy_cq_in, din, cqn, *obj_id);
+ break;
+ case MLX5_CMD_OP_ALLOC_PD:
+ MLX5_SET(dealloc_pd_in, din, opcode, MLX5_CMD_OP_DEALLOC_PD);
+ MLX5_SET(dealloc_pd_in, din, pd, *obj_id);
+ break;
+ case MLX5_CMD_OP_ALLOC_TRANSPORT_DOMAIN:
+ MLX5_SET(dealloc_transport_domain_in, din, opcode,
+ MLX5_CMD_OP_DEALLOC_TRANSPORT_DOMAIN);
+ MLX5_SET(dealloc_transport_domain_in, din, transport_domain,
+ *obj_id);
+ break;
+ case MLX5_CMD_OP_CREATE_RMP:
+ MLX5_SET(destroy_rmp_in, din, opcode, MLX5_CMD_OP_DESTROY_RMP);
+ MLX5_SET(destroy_rmp_in, din, rmpn, *obj_id);
+ break;
+ case MLX5_CMD_OP_CREATE_SQ:
+ MLX5_SET(destroy_sq_in, din, opcode, MLX5_CMD_OP_DESTROY_SQ);
+ MLX5_SET(destroy_sq_in, din, sqn, *obj_id);
+ break;
+ case MLX5_CMD_OP_CREATE_RQ:
+ MLX5_SET(destroy_rq_in, din, opcode, MLX5_CMD_OP_DESTROY_RQ);
+ MLX5_SET(destroy_rq_in, din, rqn, *obj_id);
+ break;
+ case MLX5_CMD_OP_CREATE_RQT:
+ MLX5_SET(destroy_rqt_in, din, opcode, MLX5_CMD_OP_DESTROY_RQT);
+ MLX5_SET(destroy_rqt_in, din, rqtn, *obj_id);
+ break;
+ case MLX5_CMD_OP_CREATE_TIR:
+ MLX5_SET(destroy_tir_in, din, opcode, MLX5_CMD_OP_DESTROY_TIR);
+ MLX5_SET(destroy_tir_in, din, tirn, *obj_id);
+ break;
+ case MLX5_CMD_OP_CREATE_TIS:
+ MLX5_SET(destroy_tis_in, din, opcode, MLX5_CMD_OP_DESTROY_TIS);
+ MLX5_SET(destroy_tis_in, din, tisn, *obj_id);
+ break;
+ case MLX5_CMD_OP_ALLOC_Q_COUNTER:
+ MLX5_SET(dealloc_q_counter_in, din, opcode,
+ MLX5_CMD_OP_DEALLOC_Q_COUNTER);
+ MLX5_SET(dealloc_q_counter_in, din, counter_set_id, *obj_id);
+ break;
+ case MLX5_CMD_OP_CREATE_FLOW_TABLE:
+ *dinlen = MLX5_ST_SZ_BYTES(destroy_flow_table_in);
+ 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(destroy_flow_table_in, 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);
+ 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(destroy_flow_group_in, 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);
+ 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(delete_fte_in, din, opcode,
+ MLX5_CMD_OP_DELETE_FLOW_TABLE_ENTRY);
+ break;
+ case MLX5_CMD_OP_ALLOC_FLOW_COUNTER:
+ MLX5_SET(dealloc_flow_counter_in, din, opcode,
+ MLX5_CMD_OP_DEALLOC_FLOW_COUNTER);
+ MLX5_SET(dealloc_flow_counter_in, din, flow_counter_id,
+ *obj_id);
+ break;
+ case MLX5_CMD_OP_ALLOC_PACKET_REFORMAT_CONTEXT:
+ MLX5_SET(dealloc_packet_reformat_context_in, din, opcode,
+ MLX5_CMD_OP_DEALLOC_PACKET_REFORMAT_CONTEXT);
+ MLX5_SET(dealloc_packet_reformat_context_in, din,
+ packet_reformat_id, *obj_id);
+ break;
+ case MLX5_CMD_OP_ALLOC_MODIFY_HEADER_CONTEXT:
+ MLX5_SET(dealloc_modify_header_context_in, din, opcode,
+ MLX5_CMD_OP_DEALLOC_MODIFY_HEADER_CONTEXT);
+ MLX5_SET(dealloc_modify_header_context_in, din,
+ modify_header_id, *obj_id);
+ break;
+ case MLX5_CMD_OP_CREATE_SCHEDULING_ELEMENT:
+ *dinlen = MLX5_ST_SZ_BYTES(destroy_scheduling_element_in);
+ 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(destroy_scheduling_element_in, 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);
+ MLX5_SET(delete_vxlan_udp_dport_in, din, vxlan_udp_port, *obj_id);
+ MLX5_SET(delete_vxlan_udp_dport_in, 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);
+ MLX5_SET(delete_l2_table_entry_in, din, table_index, *obj_id);
+ MLX5_SET(delete_l2_table_entry_in, din, opcode,
+ MLX5_CMD_OP_DELETE_L2_TABLE_ENTRY);
+ break;
+ case MLX5_CMD_OP_CREATE_QP:
+ MLX5_SET(destroy_qp_in, din, opcode, MLX5_CMD_OP_DESTROY_QP);
+ MLX5_SET(destroy_qp_in, din, qpn, *obj_id);
+ break;
+ case MLX5_CMD_OP_CREATE_SRQ:
+ MLX5_SET(destroy_srq_in, din, opcode, MLX5_CMD_OP_DESTROY_SRQ);
+ MLX5_SET(destroy_srq_in, din, srqn, *obj_id);
+ break;
+ case MLX5_CMD_OP_CREATE_XRC_SRQ:
+ MLX5_SET(destroy_xrc_srq_in, din, opcode,
+ MLX5_CMD_OP_DESTROY_XRC_SRQ);
+ MLX5_SET(destroy_xrc_srq_in, din, xrc_srqn, *obj_id);
+ break;
+ case MLX5_CMD_OP_CREATE_DCT:
+ MLX5_SET(destroy_dct_in, din, opcode, MLX5_CMD_OP_DESTROY_DCT);
+ MLX5_SET(destroy_dct_in, din, dctn, *obj_id);
+ break;
+ case MLX5_CMD_OP_CREATE_XRQ:
+ MLX5_SET(destroy_xrq_in, din, opcode, MLX5_CMD_OP_DESTROY_XRQ);
+ MLX5_SET(destroy_xrq_in, din, xrqn, *obj_id);
+ 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(detach_from_mcg_in, din, opcode,
+ MLX5_CMD_OP_DETACH_FROM_MCG);
+ MLX5_SET(detach_from_mcg_in, din, qpn, *obj_id);
+ break;
+ case MLX5_CMD_OP_ALLOC_XRCD:
+ MLX5_SET(dealloc_xrcd_in, din, opcode,
+ MLX5_CMD_OP_DEALLOC_XRCD);
+ MLX5_SET(dealloc_xrcd_in, din, xrcd, *obj_id);
+ break;
+ case MLX5_CMD_OP_CREATE_PSV:
+ MLX5_SET(destroy_psv_in, din, opcode,
+ MLX5_CMD_OP_DESTROY_PSV);
+ MLX5_SET(destroy_psv_in, din, psvn, *obj_id);
+ 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_mkey *mkey = &obj->mkey;
+ void *mkc;
+ u8 key;
+
+ 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->ndescs = MLX5_GET(mkc, mkc, translations_octword_size);
+ init_waitqueue_head(&mkey->wait);
+
+ return mlx5r_store_odp_mkey(dev, mkey);
+}
+
+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 &&
+ xa_erase(&obj->ib_dev->odp_mkeys,
+ mlx5_base_mkey(obj->mkey.key)))
+ /*
+ * 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 #.
+ */
+ mlx5r_deref_wait_odp_mkey(&obj->mkey);
+
+ if (obj->flags & DEVX_OBJ_FLAGS_DCT)
+ ret = mlx5_core_destroy_dct(obj->ib_dev, &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 (ret)
+ 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 bool is_apu_cq(struct mlx5_ib_dev *dev, const void *in)
+{
+ if (!MLX5_CAP_GEN(dev->mdev, apu) ||
+ !MLX5_GET(cqc, MLX5_ADDR_OF(create_cq_in, in, cq_context), apu_cq))
+ return false;
+
+ return true;
+}
+
+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, err2 = 0;
+ 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, &obj->core_dct, cmd_in,
+ cmd_in_len, cmd_out, cmd_out_len);
+ } else if (opcode == MLX5_CMD_OP_CREATE_CQ &&
+ !is_apu_cq(dev, cmd_in)) {
+ obj->flags |= DEVX_OBJ_FLAGS_CQ;
+ obj->core_cq.comp = devx_cq_comp;
+ err = mlx5_create_cq(dev->mdev, &obj->core_cq,
+ cmd_in, cmd_in_len, cmd_out,
+ cmd_out_len);
+ } else {
+ err = mlx5_cmd_do(dev->mdev, cmd_in, cmd_in_len,
+ cmd_out, cmd_out_len);
+ }
+
+ if (err == -EREMOTEIO)
+ err2 = uverbs_copy_to(attrs,
+ MLX5_IB_ATTR_DEVX_OBJ_CREATE_CMD_OUT,
+ cmd_out, cmd_out_len);
+ if (err)
+ goto obj_free;
+
+ if (opcode == MLX5_CMD_OP_ALLOC_FLOW_COUNTER) {
+ u32 bulk = MLX5_GET(alloc_flow_counter_in,
+ cmd_in,
+ flow_counter_bulk_log_size);
+
+ if (bulk)
+ bulk = 1 << bulk;
+ else
+ bulk = 128UL * MLX5_GET(alloc_flow_counter_in,
+ cmd_in,
+ flow_counter_bulk);
+ obj->flow_counter_bulk_size = 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, &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 err2 ?: 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, err2;
+ 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_do(mdev->mdev, cmd_in,
+ uverbs_attr_get_len(attrs, MLX5_IB_ATTR_DEVX_OBJ_MODIFY_CMD_IN),
+ cmd_out, cmd_out_len);
+ if (err && err != -EREMOTEIO)
+ return err;
+
+ err2 = uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_OBJ_MODIFY_CMD_OUT,
+ cmd_out, cmd_out_len);
+
+ return err2 ?: err;
+}
+
+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, err2;
+ 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_do(mdev->mdev, cmd_in,
+ uverbs_attr_get_len(attrs, MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_IN),
+ cmd_out, cmd_out_len);
+ if (err && err != -EREMOTEIO)
+ return err;
+
+ err2 = uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_OUT,
+ cmd_out, cmd_out_len);
+
+ return err2 ?: err;
+}
+
+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) {
+ kfree(obj_event);
+ 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;
+ 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;
+
+ event_sub = kzalloc(sizeof(*event_sub), GFP_KERNEL);
+ if (!event_sub) {
+ err = -ENOMEM;
+ 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, u32 access_flags)
+{
+ u64 addr;
+ size_t size;
+ int err;
+
+ 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 = ib_check_mr_access(&dev->ib_dev, access_flags);
+ if (err)
+ return err;
+
+ if (uverbs_attr_is_valid(attrs, MLX5_IB_ATTR_DEVX_UMEM_REG_DMABUF_FD)) {
+ struct ib_umem_dmabuf *umem_dmabuf;
+ int dmabuf_fd;
+
+ err = uverbs_get_raw_fd(&dmabuf_fd, attrs,
+ MLX5_IB_ATTR_DEVX_UMEM_REG_DMABUF_FD);
+ if (err)
+ return -EFAULT;
+
+ umem_dmabuf = ib_umem_dmabuf_get_pinned(
+ &dev->ib_dev, addr, size, dmabuf_fd, access_flags);
+ if (IS_ERR(umem_dmabuf))
+ return PTR_ERR(umem_dmabuf);
+ obj->umem = &umem_dmabuf->umem;
+ } else {
+ obj->umem = ib_umem_get(&dev->ib_dev, addr, size, access_flags);
+ if (IS_ERR(obj->umem))
+ return PTR_ERR(obj->umem);
+ }
+ return 0;
+}
+
+static unsigned int devx_umem_find_best_pgsize(struct ib_umem *umem,
+ unsigned long pgsz_bitmap)
+{
+ unsigned long page_size;
+
+ /* Don't bother checking larger page sizes as offset must be zero and
+ * total DEVX umem length must be equal to total umem length.
+ */
+ pgsz_bitmap &= GENMASK_ULL(max_t(u64, order_base_2(umem->length),
+ PAGE_SHIFT),
+ MLX5_ADAPTER_PAGE_SHIFT);
+ if (!pgsz_bitmap)
+ return 0;
+
+ page_size = ib_umem_find_best_pgoff(umem, pgsz_bitmap, U64_MAX);
+ if (!page_size)
+ return 0;
+
+ /* If the page_size is less than the CPU page size then we can use the
+ * offset and create a umem which is a subset of the page list.
+ * For larger page sizes we can't be sure the DMA list reflects the
+ * VA so we must ensure that the umem extent is exactly equal to the
+ * page list. Reduce the page size until one of these cases is true.
+ */
+ while ((ib_umem_dma_offset(umem, page_size) != 0 ||
+ (umem->length % page_size) != 0) &&
+ page_size > PAGE_SIZE)
+ page_size /= 2;
+
+ return page_size;
+}
+
+static int devx_umem_reg_cmd_alloc(struct mlx5_ib_dev *dev,
+ struct uverbs_attr_bundle *attrs,
+ struct devx_umem *obj,
+ struct devx_umem_reg_cmd *cmd,
+ int access)
+{
+ unsigned long pgsz_bitmap;
+ unsigned int page_size;
+ __be64 *mtt;
+ void *umem;
+ int ret;
+
+ /*
+ * If the user does not pass in pgsz_bitmap then the user promises not
+ * to use umem_offset!=0 in any commands that allocate on top of the
+ * umem.
+ *
+ * If the user wants to use a umem_offset then it must pass in
+ * pgsz_bitmap which guides the maximum page size and thus maximum
+ * object alignment inside the umem. See the PRM.
+ *
+ * Users are not allowed to use IOVA here, mkeys are not supported on
+ * umem.
+ */
+ ret = uverbs_get_const_default(&pgsz_bitmap, attrs,
+ MLX5_IB_ATTR_DEVX_UMEM_REG_PGSZ_BITMAP,
+ GENMASK_ULL(63,
+ min(PAGE_SHIFT, MLX5_ADAPTER_PAGE_SHIFT)));
+ if (ret)
+ return ret;
+
+ page_size = devx_umem_find_best_pgsize(obj->umem, pgsz_bitmap);
+ if (!page_size)
+ return -EINVAL;
+
+ cmd->inlen = MLX5_ST_SZ_BYTES(create_umem_in) +
+ (MLX5_ST_SZ_BYTES(mtt) *
+ ib_umem_num_dma_blocks(obj->umem, page_size));
+ cmd->in = uverbs_zalloc(attrs, cmd->inlen);
+ if (IS_ERR(cmd->in))
+ return PTR_ERR(cmd->in);
+
+ 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,
+ ib_umem_num_dma_blocks(obj->umem, page_size));
+ MLX5_SET(umem, umem, log_page_size,
+ order_base_2(page_size) - MLX5_ADAPTER_PAGE_SHIFT);
+ MLX5_SET(umem, umem, page_offset,
+ ib_umem_dma_offset(obj->umem, page_size));
+
+ if (mlx5_umem_needs_ats(dev, obj->umem, access))
+ MLX5_SET(umem, umem, ats, 1);
+
+ mlx5_ib_populate_pas(obj->umem, page_size, mtt,
+ (obj->umem->writable ? MLX5_IB_MTT_WRITE : 0) |
+ MLX5_IB_MTT_READ);
+ return 0;
+}
+
+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 access_flags;
+ int err;
+
+ if (!c->devx_uid)
+ return -EINVAL;
+
+ err = uverbs_get_flags32(&access_flags, attrs,
+ MLX5_IB_ATTR_DEVX_UMEM_REG_ACCESS,
+ IB_ACCESS_LOCAL_WRITE |
+ IB_ACCESS_REMOTE_WRITE |
+ IB_ACCESS_REMOTE_READ |
+ IB_ACCESS_RELAXED_ORDERING);
+ if (err)
+ return err;
+
+ obj = kzalloc(sizeof(struct devx_umem), GFP_KERNEL);
+ if (!obj)
+ return -ENOMEM;
+
+ err = devx_umem_get(dev, &c->ibucontext, attrs, obj, access_flags);
+ if (err)
+ goto err_obj_free;
+
+ err = devx_umem_reg_cmd_alloc(dev, attrs, obj, &cmd, access_flags);
+ if (err)
+ goto err_umem_release;
+
+ 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);
+ uverbs_finalize_uobj_create(attrs, MLX5_IB_ATTR_DEVX_UMEM_REG_HANDLE);
+
+ err = uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_UMEM_REG_OUT_ID, &obj_id,
+ sizeof(obj_id));
+ return err;
+
+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 (err)
+ 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;
+}
+
+int mlx5_ib_devx_init(struct mlx5_ib_dev *dev)
+{
+ struct mlx5_devx_event_table *table = &dev->devx_event_table;
+ int uid;
+
+ uid = mlx5_ib_devx_create(dev, false);
+ if (uid > 0) {
+ dev->devx_whitelist_uid = uid;
+ 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);
+ }
+
+ return 0;
+}
+
+void mlx5_ib_devx_cleanup(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;
+
+ if (dev->devx_whitelist_uid) {
+ 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);
+
+ mlx5_ib_devx_destroy(dev, dev->devx_whitelist_uid);
+ }
+}
+
+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 *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 void 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);
+};
+
+static void 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);
+};
+
+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_RAW_FD(MLX5_IB_ATTR_DEVX_UMEM_REG_DMABUF_FD,
+ UA_OPTIONAL),
+ UVERBS_ATTR_FLAGS_IN(MLX5_IB_ATTR_DEVX_UMEM_REG_ACCESS,
+ enum ib_access_flags),
+ UVERBS_ATTR_CONST_IN(MLX5_IB_ATTR_DEVX_UMEM_REG_PGSZ_BITMAP,
+ u64),
+ 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)),
+ {},
+};