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/* SPDX-License-Identifier: Apache-2.0
* Copyright (c) 2022 Cisco Systems, Inc.
*/
#ifndef included_vlib_dma_h
#define included_vlib_dma_h
#include <vlib/vlib.h>
#define dma_log_debug(f, ...) \
vlib_log (VLIB_LOG_LEVEL_DEBUG, dma_log.class, "%s: " f, __func__, \
##__VA_ARGS__)
#define dma_log_info(f, ...) \
vlib_log (VLIB_LOG_LEVEL_INFO, dma_log.class, "%s: " f, __func__, \
##__VA_ARGS__)
struct vlib_dma_batch;
struct vlib_dma_config_data;
typedef int (vlib_dma_config_add_fn) (vlib_main_t *vm,
struct vlib_dma_config_data *cfg);
typedef void (vlib_dma_config_del_fn) (vlib_main_t *vm,
struct vlib_dma_config_data *cfg);
typedef struct vlib_dma_batch *(vlib_dma_batch_new_fn) (
vlib_main_t *vm, struct vlib_dma_config_data *);
typedef int (vlib_dma_batch_submit_fn) (vlib_main_t *vm,
struct vlib_dma_batch *b);
typedef void (vlib_dma_batch_callback_fn) (vlib_main_t *vm,
struct vlib_dma_batch *b);
typedef struct
{
union
{
struct
{
u32 barrier_before_last : 1;
u32 sw_fallback : 1;
};
u32 features;
};
u16 max_batches;
u16 max_transfers;
u32 max_transfer_size;
vlib_dma_batch_callback_fn *callback_fn;
} vlib_dma_config_t;
typedef struct vlib_dma_batch
{
vlib_dma_batch_submit_fn *submit_fn;
vlib_dma_batch_callback_fn *callback_fn;
uword cookie;
u16 src_ptr_off;
u16 dst_ptr_off;
u16 size_off;
u16 stride;
u16 n_enq;
} vlib_dma_batch_t;
typedef struct
{
char *name;
vlib_dma_config_add_fn *config_add_fn;
vlib_dma_config_del_fn *config_del_fn;
format_function_t *info_fn;
} vlib_dma_backend_t;
typedef struct vlib_dma_config_data
{
vlib_dma_config_t cfg;
vlib_dma_batch_new_fn *batch_new_fn;
uword private_data;
u32 backend_index;
u32 config_index;
} vlib_dma_config_data_t;
typedef struct
{
vlib_dma_backend_t *backends;
vlib_dma_config_data_t *configs;
} vlib_dma_main_t;
extern vlib_dma_main_t vlib_dma_main;
clib_error_t *vlib_dma_register_backend (vlib_main_t *vm,
vlib_dma_backend_t *b);
int vlib_dma_config_add (vlib_main_t *vm, vlib_dma_config_t *b);
void vlib_dma_config_del (vlib_main_t *vm, u32 config_index);
u8 *vlib_dma_config_info (u8 *s, va_list *args);
static_always_inline vlib_dma_batch_t *
vlib_dma_batch_new (vlib_main_t *vm, u32 config_index)
{
vlib_dma_main_t *dm = &vlib_dma_main;
vlib_dma_config_data_t *cd = pool_elt_at_index (dm->configs, config_index);
return cd->batch_new_fn (vm, cd);
}
static_always_inline void
vlib_dma_batch_set_cookie (vlib_main_t *vm, vlib_dma_batch_t *batch,
uword cookie)
{
batch->cookie = cookie;
}
static_always_inline uword
vlib_dma_batch_get_cookie (vlib_main_t *vm, vlib_dma_batch_t *batch)
{
return batch->cookie;
}
static_always_inline void
vlib_dma_batch_add (vlib_main_t *vm, vlib_dma_batch_t *batch, void *dst,
void *src, u32 size)
{
u8 *p = (u8 *) batch + batch->n_enq * batch->stride;
*((void **) (p + batch->dst_ptr_off)) = dst;
*((void **) (p + batch->src_ptr_off)) = src;
*((u32 *) (p + batch->size_off)) = size;
batch->n_enq++;
}
static_always_inline void
vlib_dma_batch_submit (vlib_main_t *vm, vlib_dma_batch_t *batch)
{
batch->submit_fn (vm, batch);
}
#endif
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