esp-idf/components/esp_rom/include/esp32c3/rom/lldesc.h

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// Copyright 2020 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef _ROM_LLDESC_H_
#define _ROM_LLDESC_H_
#include <stdint.h>
#include "sys/queue.h"
#ifdef __cplusplus
extern "C" {
#endif
#define LLDESC_TX_MBLK_SIZE 268 /* */
#define LLDESC_RX_SMBLK_SIZE 64 /* small block size, for small mgmt frame */
#define LLDESC_RX_MBLK_SIZE 524 /* rx is large sinec we want to contain mgmt frame in one block*/
#define LLDESC_RX_AMPDU_ENTRY_MBLK_SIZE 64 /* it is a small buffer which is a cycle link*/
#define LLDESC_RX_AMPDU_LEN_MBLK_SIZE 256 /*for ampdu entry*/
#ifdef ESP_MAC_5
#define LLDESC_TX_MBLK_NUM 116 /* 64K / 256 */
#define LLDESC_RX_MBLK_NUM 82 /* 64K / 512 MAX 172*/
#define LLDESC_RX_AMPDU_ENTRY_MBLK_NUM 4
#define LLDESC_RX_AMPDU_LEN_MLBK_NUM 12
#else
#ifdef SBUF_RXTX
#define LLDESC_TX_MBLK_NUM_MAX (2 * 48) /* 23K / 260 - 8 */
#define LLDESC_RX_MBLK_NUM_MAX (2 * 48) /* 23K / 524 */
#define LLDESC_TX_MBLK_NUM_MIN (2 * 16) /* 23K / 260 - 8 */
#define LLDESC_RX_MBLK_NUM_MIN (2 * 16) /* 23K / 524 */
#endif
#define LLDESC_TX_MBLK_NUM 10 //(2 * 32) /* 23K / 260 - 8 */
#ifdef IEEE80211_RX_AMPDU
#define LLDESC_RX_MBLK_NUM 30
#else
#define LLDESC_RX_MBLK_NUM 10
#endif /*IEEE80211_RX_AMPDU*/
#define LLDESC_RX_AMPDU_ENTRY_MBLK_NUM 4
#define LLDESC_RX_AMPDU_LEN_MLBK_NUM 8
#endif /* !ESP_MAC_5 */
/*
* SLC2 DMA Desc struct, aka lldesc_t
*
* --------------------------------------------------------------
* | own | EoF | sub_sof | 5'b0 | length [11:0] | size [11:0] |
* --------------------------------------------------------------
* | buf_ptr [31:0] |
* --------------------------------------------------------------
* | next_desc_ptr [31:0] |
* --------------------------------------------------------------
*/
/* this bitfield is start from the LSB!!! */
typedef struct lldesc_s {
volatile uint32_t size : 12,
length: 12,
offset: 5, /* h/w reserved 5bit, s/w use it as offset in buffer */
sosf : 1, /* start of sub-frame */
eof : 1, /* end of frame */
owner : 1; /* hw or sw */
volatile const uint8_t *buf; /* point to buffer data */
union {
volatile uint32_t empty;
STAILQ_ENTRY(lldesc_s) qe; /* pointing to the next desc */
};
} lldesc_t;
typedef struct tx_ampdu_entry_s {
uint32_t sub_len : 12,
dili_num : 7,
: 1,
null_byte: 2,
data : 1,
enc : 1,
seq : 8;
} tx_ampdu_entry_t;
typedef struct lldesc_chain_s {
lldesc_t *head;
lldesc_t *tail;
} lldesc_chain_t;
#ifdef SBUF_RXTX
enum sbuf_mask_s {
SBUF_MOVE_NO = 0,
SBUF_MOVE_TX2RX,
SBUF_MOVE_RX2TX,
} ;
#define SBUF_MOVE_STEP 8
#endif
#define LLDESC_SIZE sizeof(struct lldesc_s)
/* SLC Descriptor */
#define LLDESC_OWNER_MASK 0x80000000
#define LLDESC_OWNER_SHIFT 31
#define LLDESC_SW_OWNED 0
#define LLDESC_HW_OWNED 1
#define LLDESC_EOF_MASK 0x40000000
#define LLDESC_EOF_SHIFT 30
#define LLDESC_SOSF_MASK 0x20000000
#define LLDESC_SOSF_SHIFT 29
#define LLDESC_LENGTH_MASK 0x00fff000
#define LLDESC_LENGTH_SHIFT 12
#define LLDESC_SIZE_MASK 0x00000fff
#define LLDESC_SIZE_SHIFT 0
#define LLDESC_ADDR_MASK 0x000fffff
void lldesc_build_chain(uint8_t *descptr, uint32_t desclen, uint8_t *mblkptr, uint32_t buflen, uint32_t blksz, uint8_t owner,
lldesc_t **head,
#ifdef TO_HOST_RESTART
lldesc_t **one_before_tail,
#endif
lldesc_t **tail);
lldesc_t *lldesc_num2link(lldesc_t *head, uint16_t nblks);
lldesc_t *lldesc_set_owner(lldesc_t *head, uint16_t nblks, uint8_t owner);
static inline uint32_t lldesc_get_chain_length(lldesc_t *head)
{
lldesc_t *ds = head;
uint32_t len = 0;
while (ds) {
len += ds->length;
ds = STAILQ_NEXT(ds, qe);
}
return len;
}
static inline void lldesc_config(lldesc_t *ds, uint8_t owner, uint8_t eof, uint8_t sosf, uint16_t len)
{
ds->owner = owner;
ds->eof = eof;
ds->sosf = sosf;
ds->length = len;
}
#define LLDESC_CONFIG(_desc, _owner, _eof, _sosf, _len) do { \
(_desc)->owner = (_owner); \
(_desc)->eof = (_eof); \
(_desc)->sosf = (_sosf); \
(_desc)->length = (_len); \
} while(0)
#define LLDESC_FROM_HOST_CLEANUP(ds) LLDESC_CONFIG((ds), LLDESC_HW_OWNED, 0, 0, 0)
#define LLDESC_MAC_RX_CLEANUP(ds) LLDESC_CONFIG((ds), LLDESC_HW_OWNED, 0, 0, (ds)->size)
#define LLDESC_TO_HOST_CLEANUP(ds) LLDESC_CONFIG((ds), LLDESC_HW_OWNED, 0, 0, 0)
#ifdef __cplusplus
}
#endif
#endif /* _ROM_LLDESC_H_ */