ceph/src/spdk/dpdk/lib/librte_compressdev/rte_compressdev_pmd.h

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2017-2018 Intel Corporation
   3  */
   4
   5 #ifndef _RTE_COMPRESSDEV_PMD_H_
   6 #define _RTE_COMPRESSDEV_PMD_H_
   7
   8 /** @file
   9  * RTE comp PMD APIs
  10  *
  11  * @note
  12  * These APIs are for comp PMDs only and user applications should not call
  13  * them directly.
  14  */
  15
  16 #ifdef __cplusplus
  17 extern "C" {
  18 #endif
  19
  20 #include <string.h>
  21
  22 #include <rte_dev.h>
  23 #include <rte_common.h>
  24
  25 #include "rte_compressdev.h"
  26 #include "rte_compressdev_internal.h"
  27
  28 #define RTE_COMPRESSDEV_PMD_NAME_ARG                    ("name")
  29 #define RTE_COMPRESSDEV_PMD_SOCKET_ID_ARG               ("socket_id")
  30
  31 static const char * const compressdev_pmd_valid_params[] = {
  32         RTE_COMPRESSDEV_PMD_NAME_ARG,
  33         RTE_COMPRESSDEV_PMD_SOCKET_ID_ARG
  34 };
  35
  36 /**
  37  * @internal
  38  * Initialisation parameters for comp devices
  39  */
  40 struct rte_compressdev_pmd_init_params {
  41         char name[RTE_COMPRESSDEV_NAME_MAX_LEN];
  42         int socket_id;
  43 };
  44
  45 /** Global structure used for maintaining state of allocated comp devices */
  46 struct rte_compressdev_global {
  47         struct rte_compressdev *devs;   /**< Device information array */
  48         struct rte_compressdev_data *data[RTE_COMPRESS_MAX_DEVS];
  49         /**< Device private data */
  50         uint8_t nb_devs;                /**< Number of devices found */
  51         uint8_t max_devs;               /**< Max number of devices */
  52 };
  53
  54 /**
  55  * Get the rte_compressdev structure device pointer for the named device.
  56  *
  57  * @param name
  58  *   Compress device name
  59  * @return
  60  *   - The rte_compressdev structure pointer for the given device identifier.
  61  */
  62 __rte_experimental
  63 struct rte_compressdev *
  64 rte_compressdev_pmd_get_named_dev(const char *name);
  65
  66 /**
  67  * Definitions of all functions exported by a driver through the
  68  * the generic structure of type *comp_dev_ops* supplied in the
  69  * *rte_compressdev* structure associated with a device.
  70  */
  71
  72 /**
  73  * Function used to configure device.
  74  *
  75  * @param dev
  76  *   Compress device
  77  * @param config
  78  *   Compress device configurations
  79  * @return
  80  *   Returns 0 on success
  81  */
  82 typedef int (*compressdev_configure_t)(struct rte_compressdev *dev,
  83                 struct rte_compressdev_config *config);
  84
  85 /**
  86  * Function used to start a configured device.
  87  *
  88  * @param dev
  89  *   Compress device
  90  * @return
  91  *   Returns 0 on success
  92  */
  93 typedef int (*compressdev_start_t)(struct rte_compressdev *dev);
  94
  95 /**
  96  * Function used to stop a configured device.
  97  *
  98  * @param dev
  99  *   Compress device
 100  */
 101 typedef void (*compressdev_stop_t)(struct rte_compressdev *dev);
 102
 103 /**
 104  * Function used to close a configured device.
 105  *
 106  * @param dev
 107  *   Compress device
 108  * @return
 109  * - 0 on success.
 110  * - EAGAIN if can't close as device is busy
 111  */
 112 typedef int (*compressdev_close_t)(struct rte_compressdev *dev);
 113
 114
 115 /**
 116  * Function used to get statistics of a device.
 117  *
 118  * @param dev
 119  *   Compress device
 120  * @param stats
 121  *   Compress device stats to populate
 122  */
 123 typedef void (*compressdev_stats_get_t)(struct rte_compressdev *dev,
 124                                 struct rte_compressdev_stats *stats);
 125
 126
 127 /**
 128  * Function used to reset statistics of a device.
 129  *
 130  * @param dev
 131  *   Compress device
 132  */
 133 typedef void (*compressdev_stats_reset_t)(struct rte_compressdev *dev);
 134
 135
 136 /**
 137  * Function used to get specific information of a device.
 138  *
 139  * @param dev
 140  *   Compress device
 141  */
 142 typedef void (*compressdev_info_get_t)(struct rte_compressdev *dev,
 143                                 struct rte_compressdev_info *dev_info);
 144
 145 /**
 146  * Setup a queue pair for a device.
 147  *
 148  * @param dev
 149  *   Compress device
 150  * @param qp_id
 151  *   Queue pair identifier
 152  * @param max_inflight_ops
 153  *   Max inflight ops which qp must accommodate
 154  * @param socket_id
 155  *   Socket identifier
 156  * @return
 157  *   Returns 0 on success.
 158  */
 159 typedef int (*compressdev_queue_pair_setup_t)(struct rte_compressdev *dev,
 160                 uint16_t qp_id, uint32_t max_inflight_ops, int socket_id);
 161
 162 /**
 163  * Release memory resources allocated by given queue pair.
 164  *
 165  * @param dev
 166  *   Compress device
 167  * @param qp_id
 168  *   Queue pair identifier
 169  * @return
 170  * - 0 on success.
 171  * - EAGAIN if can't close as device is busy
 172  */
 173 typedef int (*compressdev_queue_pair_release_t)(struct rte_compressdev *dev,
 174                 uint16_t qp_id);
 175
 176 /**
 177  * Create driver private stream data.
 178  *
 179  * @param dev
 180  *   Compressdev device
 181  * @param xform
 182  *   xform data
 183  * @param stream
 184  *   ptr where handle of pmd's private stream data should be stored
 185  * @return
 186  *  - Returns 0 if private stream structure has been created successfully.
 187  *  - Returns -EINVAL if input parameters are invalid.
 188  *  - Returns -ENOTSUP if comp device does not support STATEFUL operations.
 189  *  - Returns -ENOTSUP if comp device does not support the comp transform.
 190  *  - Returns -ENOMEM if the private stream could not be allocated.
 191  */
 192 typedef int (*compressdev_stream_create_t)(struct rte_compressdev *dev,
 193                 const struct rte_comp_xform *xform, void **stream);
 194
 195 /**
 196  * Free driver private stream data.
 197  *
 198  * @param dev
 199  *   Compressdev device
 200  * @param stream
 201  *   handle of pmd's private stream data
 202  * @return
 203  *  - 0 if successful
 204  *  - <0 in error cases
 205  *  - Returns -EINVAL if input parameters are invalid.
 206  *  - Returns -ENOTSUP if comp device does not support STATEFUL operations.
 207  *  - Returns -EBUSY if can't free stream as there are inflight operations
 208  */
 209 typedef int (*compressdev_stream_free_t)(struct rte_compressdev *dev,
 210                 void *stream);
 211
 212 /**
 213  * Create driver private_xform data.
 214  *
 215  * @param dev
 216  *   Compressdev device
 217  * @param xform
 218  *   xform data
 219  * @param private_xform
 220  *   ptr where handle of pmd's private_xform data should be stored
 221  * @return
 222  *  - if successful returns 0
 223  *    and valid private_xform handle
 224  *  - <0 in error cases
 225  *  - Returns -EINVAL if input parameters are invalid.
 226  *  - Returns -ENOTSUP if comp device does not support the comp transform.
 227  *  - Returns -ENOMEM if the private_xform could not be allocated.
 228  */
 229 typedef int (*compressdev_private_xform_create_t)(struct rte_compressdev *dev,
 230                 const struct rte_comp_xform *xform, void **private_xform);
 231
 232 /**
 233  * Free driver private_xform data.
 234  *
 235  * @param dev
 236  *   Compressdev device
 237  * @param private_xform
 238  *   handle of pmd's private_xform data
 239  * @return
 240  *  - 0 if successful
 241  *  - <0 in error cases
 242  *  - Returns -EINVAL if input parameters are invalid.
 243  *  - Returns -EBUSY if can't free private_xform due to inflight operations
 244  */
 245 typedef int (*compressdev_private_xform_free_t)(struct rte_compressdev *dev,
 246                 void *private_xform);
 247
 248 /** comp device operations function pointer table */
 249 struct rte_compressdev_ops {
 250         compressdev_configure_t dev_configure;  /**< Configure device. */
 251         compressdev_start_t dev_start;          /**< Start device. */
 252         compressdev_stop_t dev_stop;            /**< Stop device. */
 253         compressdev_close_t dev_close;          /**< Close device. */
 254
 255         compressdev_info_get_t dev_infos_get;   /**< Get device info. */
 256
 257         compressdev_stats_get_t stats_get;
 258         /**< Get device statistics. */
 259         compressdev_stats_reset_t stats_reset;
 260         /**< Reset device statistics. */
 261
 262         compressdev_queue_pair_setup_t queue_pair_setup;
 263         /**< Set up a device queue pair. */
 264         compressdev_queue_pair_release_t queue_pair_release;
 265         /**< Release a queue pair. */
 266
 267         compressdev_stream_create_t stream_create;
 268         /**< Create a comp stream and initialise its private data. */
 269         compressdev_stream_free_t stream_free;
 270         /**< Free a comp stream's private data. */
 271
 272         compressdev_private_xform_create_t private_xform_create;
 273         /**< Create a comp private_xform and initialise its private data. */
 274         compressdev_private_xform_free_t private_xform_free;
 275         /**< Free a comp private_xform's data. */
 276 };
 277
 278 /**
 279  * @internal
 280  *
 281  * Function for internal use by dummy drivers primarily, e.g. ring-based
 282  * driver.
 283  * Allocates a new compressdev slot for an comp device and returns the pointer
 284  * to that slot for the driver to use.
 285  *
 286  * @param name
 287  *   Unique identifier name for each device
 288  * @param socket_id
 289  *   Socket to allocate resources on
 290  * @return
 291  *   - Slot in the rte_dev_devices array for a new device;
 292  */
 293 __rte_experimental
 294 struct rte_compressdev *
 295 rte_compressdev_pmd_allocate(const char *name, int socket_id);
 296
 297 /**
 298  * @internal
 299  *
 300  * Function for internal use by dummy drivers primarily, e.g. ring-based
 301  * driver.
 302  * Release the specified compressdev device.
 303  *
 304  * @param dev
 305  *   Compress device
 306  * @return
 307  *   - 0 on success, negative on error
 308  */
 309 __rte_experimental
 310 int
 311 rte_compressdev_pmd_release_device(struct rte_compressdev *dev);
 312
 313
 314 /**
 315  * @internal
 316  *
 317  * PMD assist function to parse initialisation arguments for comp driver
 318  * when creating a new comp PMD device instance.
 319  *
 320  * PMD driver should set default values for that PMD before calling function,
 321  * these default values will be over-written with successfully parsed values
 322  * from args string.
 323  *
 324  * @param params
 325  *   Parsed PMD initialisation parameters
 326  * @param args
 327  *   Input argument string to parse
 328  * @return
 329  *  - 0 on success
 330  *  - errno on failure
 331  */
 332 __rte_experimental
 333 int
 334 rte_compressdev_pmd_parse_input_args(
 335                 struct rte_compressdev_pmd_init_params *params,
 336                 const char *args);
 337
 338 /**
 339  * @internal
 340  *
 341  * PMD assist function to provide boiler plate code for comp driver to create
 342  * and allocate resources for a new comp PMD device instance.
 343  *
 344  * @param name
 345  *   Compress device name
 346  * @param device
 347  *   Base device instance
 348  * @param params
 349  *   PMD initialisation parameters
 350  * @return
 351  *  - comp device instance on success
 352  *  - NULL on creation failure
 353  */
 354 __rte_experimental
 355 struct rte_compressdev *
 356 rte_compressdev_pmd_create(const char *name,
 357                 struct rte_device *device,
 358                 size_t private_data_size,
 359                 struct rte_compressdev_pmd_init_params *params);
 360
 361 /**
 362  * @internal
 363  *
 364  * PMD assist function to provide boiler plate code for comp driver to
 365  * destroy and free resources associated with a comp PMD device instance.
 366  *
 367  * @param dev
 368  *   Compress device
 369  * @return
 370  *  - 0 on success
 371  *  - errno on failure
 372  */
 373 __rte_experimental
 374 int
 375 rte_compressdev_pmd_destroy(struct rte_compressdev *dev);
 376
 377 #ifdef __cplusplus
 378 }
 379 #endif
 380
 381 #endif /* _RTE_COMPRESSDEV_PMD_H_ */