1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright 2019 Mellanox Technologies, Ltd
5 #ifndef RTE_PMD_MLX5_VDPA_H_
6 #define RTE_PMD_MLX5_VDPA_H_
8 #include <linux/virtio_net.h>
12 #pragma GCC diagnostic ignored "-Wpedantic"
15 #include <rte_vdpa_dev.h>
16 #include <rte_vhost.h>
18 #pragma GCC diagnostic error "-Wpedantic"
20 #include <rte_spinlock.h>
21 #include <rte_interrupts.h>
23 #include <mlx5_glue.h>
24 #include <mlx5_devx_cmds.h>
28 #define MLX5_VDPA_INTR_RETRIES 256
29 #define MLX5_VDPA_INTR_RETRIES_USEC 1000
31 #ifndef VIRTIO_F_ORDER_PLATFORM
32 #define VIRTIO_F_ORDER_PLATFORM 36
35 #ifndef VIRTIO_F_RING_PACKED
36 #define VIRTIO_F_RING_PACKED 34
45 struct mlx5_devx_obj *cq;
46 struct mlx5dv_devx_umem *umem_obj;
48 volatile void *umem_buf;
49 volatile struct mlx5_cqe *cqes;
51 volatile uint32_t *db_rec;
55 struct mlx5_vdpa_event_qp {
56 struct mlx5_vdpa_cq cq;
57 struct mlx5_devx_obj *fw_qp;
58 struct mlx5_devx_obj *sw_qp;
59 struct mlx5dv_devx_umem *umem_obj;
61 volatile uint32_t *db_rec;
64 struct mlx5_vdpa_query_mr {
65 SLIST_ENTRY(mlx5_vdpa_query_mr) next;
68 struct mlx5dv_devx_umem *umem;
69 struct mlx5_devx_obj *mkey;
73 struct mlx5_vdpa_virtq {
74 SLIST_ENTRY(mlx5_vdpa_virtq) next;
78 struct mlx5_vdpa_priv *priv;
79 struct mlx5_devx_obj *virtq;
80 struct mlx5_devx_obj *counters;
81 struct mlx5_vdpa_event_qp eqp;
83 struct mlx5dv_devx_umem *obj;
87 struct rte_intr_handle intr_handle;
88 struct mlx5_devx_virtio_q_couners_attr reset;
91 struct mlx5_vdpa_steer {
92 struct mlx5_devx_obj *rqt;
96 struct mlx5dv_flow_matcher *matcher;
97 struct mlx5_devx_obj *tir;
103 struct mlx5_vdpa_priv {
104 TAILQ_ENTRY(mlx5_vdpa_priv) next;
106 uint8_t direct_notifier; /* Whether direct notifier is on or off. */
107 struct rte_vdpa_device *vdev; /* vDPA device. */
108 int vid; /* vhost device id. */
109 struct ibv_context *ctx; /* Device context. */
110 struct rte_pci_device *pci_dev;
111 struct mlx5_hca_vdpa_attr caps;
112 uint32_t pdn; /* Protection Domain number. */
114 uint32_t gpa_mkey_index;
115 struct ibv_mr *null_mr;
116 struct rte_vhost_memory *vmem;
118 struct mlx5dv_devx_event_channel *eventc;
119 struct mlx5dv_devx_uar *uar;
120 struct rte_intr_handle intr_handle;
121 struct mlx5_devx_obj *td;
122 struct mlx5_devx_obj *tis;
124 uint64_t features; /* Negotiated features. */
125 uint16_t log_max_rqt_size;
126 struct mlx5_vdpa_steer steer;
127 struct mlx5dv_var *var;
129 SLIST_HEAD(mr_list, mlx5_vdpa_query_mr) mr_list;
130 struct mlx5_vdpa_virtq virtqs[];
134 MLX5_VDPA_STATS_RECEIVED_DESCRIPTORS,
135 MLX5_VDPA_STATS_COMPLETED_DESCRIPTORS,
136 MLX5_VDPA_STATS_BAD_DESCRIPTOR_ERRORS,
137 MLX5_VDPA_STATS_EXCEED_MAX_CHAIN,
138 MLX5_VDPA_STATS_INVALID_BUFFER,
139 MLX5_VDPA_STATS_COMPLETION_ERRORS,
144 * Check whether virtq is for traffic receive.
145 * According to VIRTIO_NET Spec the virtqueues index identity its type by:
150 * 2(N-1)+1 transmitqN
153 static inline uint8_t
154 is_virtq_recvq(int virtq_index, int nr_vring)
156 if (virtq_index % 2 == 0 && virtq_index != nr_vring - 1)
162 * Release all the prepared memory regions and all their related resources.
165 * The vdpa driver private structure.
167 void mlx5_vdpa_mem_dereg(struct mlx5_vdpa_priv *priv);
170 * Register all the memory regions of the virtio device to the HW and allocate
171 * all their related resources.
174 * The vdpa driver private structure.
177 * 0 on success, a negative errno value otherwise and rte_errno is set.
179 int mlx5_vdpa_mem_register(struct mlx5_vdpa_priv *priv);
183 * Create an event QP and all its related resources.
186 * The vdpa driver private structure.
188 * Number of descriptors.
190 * The guest notification file descriptor.
192 * Pointer to the event QP structure.
195 * 0 on success, -1 otherwise and rte_errno is set.
197 int mlx5_vdpa_event_qp_create(struct mlx5_vdpa_priv *priv, uint16_t desc_n,
198 int callfd, struct mlx5_vdpa_event_qp *eqp);
201 * Destroy an event QP and all its related resources.
204 * Pointer to the event QP structure.
206 void mlx5_vdpa_event_qp_destroy(struct mlx5_vdpa_event_qp *eqp);
209 * Release all the event global resources.
212 * The vdpa driver private structure.
214 void mlx5_vdpa_event_qp_global_release(struct mlx5_vdpa_priv *priv);
220 * The vdpa driver private structure.
223 * 0 on success, a negative errno value otherwise and rte_errno is set.
225 int mlx5_vdpa_cqe_event_setup(struct mlx5_vdpa_priv *priv);
231 * The vdpa driver private structure.
233 void mlx5_vdpa_cqe_event_unset(struct mlx5_vdpa_priv *priv);
236 * Release a virtq and all its related resources.
239 * The vdpa driver private structure.
241 void mlx5_vdpa_virtqs_release(struct mlx5_vdpa_priv *priv);
244 * Create all the HW virtqs resources and all their related resources.
247 * The vdpa driver private structure.
250 * 0 on success, a negative errno value otherwise and rte_errno is set.
252 int mlx5_vdpa_virtqs_prepare(struct mlx5_vdpa_priv *priv);
255 * Enable\Disable virtq..
258 * The vdpa driver private structure.
262 * Set to enable, otherwise disable.
265 * 0 on success, a negative value otherwise.
267 int mlx5_vdpa_virtq_enable(struct mlx5_vdpa_priv *priv, int index, int enable);
270 * Unset steering and release all its related resources- stop traffic.
273 * The vdpa driver private structure.
275 void mlx5_vdpa_steer_unset(struct mlx5_vdpa_priv *priv);
278 * Update steering according to the received queues status.
281 * The vdpa driver private structure.
284 * 0 on success, a negative value otherwise.
286 int mlx5_vdpa_steer_update(struct mlx5_vdpa_priv *priv);
289 * Setup steering and all its related resources to enable RSS traffic from the
290 * device to all the Rx host queues.
293 * The vdpa driver private structure.
296 * 0 on success, a negative value otherwise.
298 int mlx5_vdpa_steer_setup(struct mlx5_vdpa_priv *priv);
301 * Enable\Disable live migration logging.
304 * The vdpa driver private structure.
306 * Set for enable, unset for disable.
309 * 0 on success, a negative value otherwise.
311 int mlx5_vdpa_logging_enable(struct mlx5_vdpa_priv *priv, int enable);
314 * Set dirty bitmap logging to allow live migration.
317 * The vdpa driver private structure.
318 * @param[in] log_base
320 * @param[in] log_size
324 * 0 on success, a negative value otherwise.
326 int mlx5_vdpa_dirty_bitmap_set(struct mlx5_vdpa_priv *priv, uint64_t log_base,
330 * Log all virtqs information for live migration.
333 * The vdpa driver private structure.
335 * Set for enable, unset for disable.
338 * 0 on success, a negative value otherwise.
340 int mlx5_vdpa_lm_log(struct mlx5_vdpa_priv *priv);
343 * Modify virtq state to be ready or suspend.
346 * The vdpa driver private virtq structure.
348 * Set for ready, otherwise suspend.
351 * 0 on success, a negative value otherwise.
353 int mlx5_vdpa_virtq_modify(struct mlx5_vdpa_virtq *virtq, int state);
356 * Stop virtq before destroying it.
359 * The vdpa driver private structure.
364 * 0 on success, a negative value otherwise.
366 int mlx5_vdpa_virtq_stop(struct mlx5_vdpa_priv *priv, int index);
369 * Get virtq statistics.
372 * The vdpa driver private structure.
376 * The virtq statistics array to fill.
378 * The number of elements in @p stats array.
381 * A negative value on error, otherwise the number of entries filled in the
385 mlx5_vdpa_virtq_stats_get(struct mlx5_vdpa_priv *priv, int qid,
386 struct rte_vdpa_stat *stats, unsigned int n);
389 * Reset virtq statistics.
392 * The vdpa driver private structure.
397 * A negative value on error, otherwise 0.
400 mlx5_vdpa_virtq_stats_reset(struct mlx5_vdpa_priv *priv, int qid);
401 #endif /* RTE_PMD_MLX5_VDPA_H_ */