1 /* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
3 * Copyright (c) 2021-2022, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
6 #ifndef MLX5_VFIO_CMD_H
7 #define MLX5_VFIO_CMD_H
9 #include <linux/kernel.h>
10 #include <linux/vfio_pci_core.h>
11 #include <linux/mlx5/driver.h>
12 #include <linux/mlx5/vport.h>
13 #include <linux/mlx5/cq.h>
14 #include <linux/mlx5/qp.h>
16 #define MLX5VF_PRE_COPY_SUPP(mvdev) \
17 ((mvdev)->core_device.vdev.migration_flags & VFIO_MIGRATION_PRE_COPY)
19 enum mlx5_vf_migf_state {
20 MLX5_MIGF_STATE_ERROR = 1,
21 MLX5_MIGF_STATE_PRE_COPY_ERROR,
22 MLX5_MIGF_STATE_PRE_COPY,
23 MLX5_MIGF_STATE_SAVE_LAST,
24 MLX5_MIGF_STATE_COMPLETE,
27 enum mlx5_vf_load_state {
28 MLX5_VF_LOAD_STATE_READ_IMAGE_NO_HEADER,
29 MLX5_VF_LOAD_STATE_READ_HEADER,
30 MLX5_VF_LOAD_STATE_PREP_HEADER_DATA,
31 MLX5_VF_LOAD_STATE_READ_HEADER_DATA,
32 MLX5_VF_LOAD_STATE_PREP_IMAGE,
33 MLX5_VF_LOAD_STATE_READ_IMAGE,
34 MLX5_VF_LOAD_STATE_LOAD_IMAGE,
37 struct mlx5_vf_migration_tag_stop_copy_data {
38 __le64 stop_copy_size;
41 enum mlx5_vf_migf_header_flags {
42 MLX5_MIGF_HEADER_FLAGS_TAG_MANDATORY = 0,
43 MLX5_MIGF_HEADER_FLAGS_TAG_OPTIONAL = 1 << 0,
46 enum mlx5_vf_migf_header_tag {
47 MLX5_MIGF_HEADER_TAG_FW_DATA = 0,
48 MLX5_MIGF_HEADER_TAG_STOP_COPY_SIZE = 1 << 0,
51 struct mlx5_vf_migration_header {
53 /* For future use in case we may need to change the kernel protocol */
54 __le32 flags; /* Use mlx5_vf_migf_header_flags */
55 __le32 tag; /* Use mlx5_vf_migf_header_tag */
56 __u8 data[]; /* Its size is given in the record_size */
59 struct mlx5_vhca_data_buffer {
60 struct sg_append_table table;
65 enum dma_data_direction dma_dir;
67 struct list_head buf_elm;
68 struct mlx5_vf_migration_file *migf;
69 /* Optimize mlx5vf_get_migration_page() for sequential access */
70 struct scatterlist *last_offset_sg;
71 unsigned int sg_last_entry;
72 unsigned long last_offset;
75 struct mlx5vf_async_data {
76 struct mlx5_async_work cb_work;
77 struct work_struct work;
78 struct mlx5_vhca_data_buffer *buf;
79 struct mlx5_vhca_data_buffer *header_buf;
85 struct mlx5_vf_migration_file {
88 enum mlx5_vf_migf_state state;
90 enum mlx5_vf_load_state load_state;
95 u64 stop_copy_prep_size;
96 u64 pre_copy_initial_bytes;
97 struct mlx5_vhca_data_buffer *buf;
98 struct mlx5_vhca_data_buffer *buf_header;
100 struct list_head buf_list;
101 struct list_head avail_list;
102 struct mlx5vf_pci_core_device *mvdev;
103 wait_queue_head_t poll_wait;
104 struct completion save_comp;
105 struct mlx5_async_ctx async_ctx;
106 struct mlx5vf_async_data async_data;
109 struct mlx5_vhca_cq_buf {
110 struct mlx5_frag_buf_ctrl fbc;
111 struct mlx5_frag_buf frag_buf;
116 struct mlx5_vhca_cq {
117 struct mlx5_vhca_cq_buf buf;
119 struct mlx5_core_cq mcq;
123 struct mlx5_vhca_recv_buf {
125 struct page **page_list;
126 dma_addr_t *dma_addrs;
131 struct mlx5_vhca_qp {
132 struct mlx5_frag_buf buf;
134 struct mlx5_vhca_recv_buf recv_buf;
135 u32 tracked_page_size;
141 unsigned int wqe_cnt;
143 struct mlx5_frag_buf_ctrl fbc;
147 struct mlx5_vhca_page_tracker {
151 struct mlx5_uars_page *uar;
152 struct mlx5_vhca_cq cq;
153 struct mlx5_vhca_qp *host_qp;
154 struct mlx5_vhca_qp *fw_qp;
159 struct mlx5vf_pci_core_device {
160 struct vfio_pci_core_device core_device;
167 struct completion tracker_comp;
168 /* protect migration state */
169 struct mutex state_mutex;
170 enum vfio_device_mig_state mig_state;
171 /* protect the reset_done flow */
172 spinlock_t reset_lock;
173 struct mlx5_vf_migration_file *resuming_migf;
174 struct mlx5_vf_migration_file *saving_migf;
175 struct mlx5_vhca_page_tracker tracker;
176 struct workqueue_struct *cb_wq;
177 struct notifier_block nb;
178 struct mlx5_core_dev *mdev;
182 MLX5VF_QUERY_INC = (1UL << 0),
183 MLX5VF_QUERY_FINAL = (1UL << 1),
186 int mlx5vf_cmd_suspend_vhca(struct mlx5vf_pci_core_device *mvdev, u16 op_mod);
187 int mlx5vf_cmd_resume_vhca(struct mlx5vf_pci_core_device *mvdev, u16 op_mod);
188 int mlx5vf_cmd_query_vhca_migration_state(struct mlx5vf_pci_core_device *mvdev,
189 size_t *state_size, u8 query_flags);
190 void mlx5vf_cmd_set_migratable(struct mlx5vf_pci_core_device *mvdev,
191 const struct vfio_migration_ops *mig_ops,
192 const struct vfio_log_ops *log_ops);
193 void mlx5vf_cmd_remove_migratable(struct mlx5vf_pci_core_device *mvdev);
194 void mlx5vf_cmd_close_migratable(struct mlx5vf_pci_core_device *mvdev);
195 int mlx5vf_cmd_save_vhca_state(struct mlx5vf_pci_core_device *mvdev,
196 struct mlx5_vf_migration_file *migf,
197 struct mlx5_vhca_data_buffer *buf, bool inc,
199 int mlx5vf_cmd_load_vhca_state(struct mlx5vf_pci_core_device *mvdev,
200 struct mlx5_vf_migration_file *migf,
201 struct mlx5_vhca_data_buffer *buf);
202 int mlx5vf_cmd_alloc_pd(struct mlx5_vf_migration_file *migf);
203 void mlx5vf_cmd_dealloc_pd(struct mlx5_vf_migration_file *migf);
204 void mlx5fv_cmd_clean_migf_resources(struct mlx5_vf_migration_file *migf);
205 struct mlx5_vhca_data_buffer *
206 mlx5vf_alloc_data_buffer(struct mlx5_vf_migration_file *migf,
207 size_t length, enum dma_data_direction dma_dir);
208 void mlx5vf_free_data_buffer(struct mlx5_vhca_data_buffer *buf);
209 struct mlx5_vhca_data_buffer *
210 mlx5vf_get_data_buffer(struct mlx5_vf_migration_file *migf,
211 size_t length, enum dma_data_direction dma_dir);
212 void mlx5vf_put_data_buffer(struct mlx5_vhca_data_buffer *buf);
213 int mlx5vf_add_migration_pages(struct mlx5_vhca_data_buffer *buf,
214 unsigned int npages);
215 struct page *mlx5vf_get_migration_page(struct mlx5_vhca_data_buffer *buf,
216 unsigned long offset);
217 void mlx5vf_state_mutex_unlock(struct mlx5vf_pci_core_device *mvdev);
218 void mlx5vf_disable_fds(struct mlx5vf_pci_core_device *mvdev);
219 void mlx5vf_mig_file_cleanup_cb(struct work_struct *_work);
220 int mlx5vf_start_page_tracker(struct vfio_device *vdev,
221 struct rb_root_cached *ranges, u32 nnodes, u64 *page_size);
222 int mlx5vf_stop_page_tracker(struct vfio_device *vdev);
223 int mlx5vf_tracker_read_and_clear(struct vfio_device *vdev, unsigned long iova,
224 unsigned long length, struct iova_bitmap *dirty);
225 #endif /* MLX5_VFIO_CMD_H */