98 lines
2.5 KiB
C
98 lines
2.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
|
|
/*
|
|
* Copyright(c) 2016 Intel Corporation.
|
|
*/
|
|
|
|
#ifndef HFI1_SDMA_TXREQ_H
|
|
#define HFI1_SDMA_TXREQ_H
|
|
|
|
/* increased for AHG */
|
|
#define NUM_DESC 6
|
|
|
|
/*
|
|
* struct sdma_desc - canonical fragment descriptor
|
|
*
|
|
* This is the descriptor carried in the tx request
|
|
* corresponding to each fragment.
|
|
*
|
|
*/
|
|
struct sdma_desc {
|
|
/* private: don't use directly */
|
|
u64 qw[2];
|
|
void *pinning_ctx;
|
|
/* Release reference to @pinning_ctx. May be called in interrupt context. Must not sleep. */
|
|
void (*ctx_put)(void *ctx);
|
|
};
|
|
|
|
/**
|
|
* struct sdma_txreq - the sdma_txreq structure (one per packet)
|
|
* @list: for use by user and by queuing for wait
|
|
*
|
|
* This is the representation of a packet which consists of some
|
|
* number of fragments. Storage is provided to within the structure.
|
|
* for all fragments.
|
|
*
|
|
* The storage for the descriptors are automatically extended as needed
|
|
* when the currently allocation is exceeded.
|
|
*
|
|
* The user (Verbs or PSM) may overload this structure with fields
|
|
* specific to their use by putting this struct first in their struct.
|
|
* The method of allocation of the overloaded structure is user dependent
|
|
*
|
|
* The list is the only public field in the structure.
|
|
*
|
|
*/
|
|
|
|
#define SDMA_TXREQ_S_OK 0
|
|
#define SDMA_TXREQ_S_SENDERROR 1
|
|
#define SDMA_TXREQ_S_ABORTED 2
|
|
#define SDMA_TXREQ_S_SHUTDOWN 3
|
|
|
|
/* flags bits */
|
|
#define SDMA_TXREQ_F_URGENT 0x0001
|
|
#define SDMA_TXREQ_F_AHG_COPY 0x0002
|
|
#define SDMA_TXREQ_F_USE_AHG 0x0004
|
|
#define SDMA_TXREQ_F_VIP 0x0010
|
|
|
|
struct sdma_txreq;
|
|
typedef void (*callback_t)(struct sdma_txreq *, int);
|
|
|
|
struct iowait;
|
|
struct sdma_txreq {
|
|
struct list_head list;
|
|
/* private: */
|
|
struct sdma_desc *descp;
|
|
/* private: */
|
|
void *coalesce_buf;
|
|
/* private: */
|
|
struct iowait *wait;
|
|
/* private: */
|
|
callback_t complete;
|
|
#ifdef CONFIG_HFI1_DEBUG_SDMA_ORDER
|
|
u64 sn;
|
|
#endif
|
|
/* private: - used in coalesce/pad processing */
|
|
u16 packet_len;
|
|
/* private: - down-counted to trigger last */
|
|
u16 tlen;
|
|
/* private: */
|
|
u16 num_desc;
|
|
/* private: */
|
|
u16 desc_limit;
|
|
/* private: */
|
|
u16 next_descq_idx;
|
|
/* private: */
|
|
u16 coalesce_idx;
|
|
/* private: flags */
|
|
u16 flags;
|
|
/* private: */
|
|
struct sdma_desc descs[NUM_DESC];
|
|
};
|
|
|
|
static inline int sdma_txreq_built(struct sdma_txreq *tx)
|
|
{
|
|
return tx->num_desc;
|
|
}
|
|
|
|
#endif /* HFI1_SDMA_TXREQ_H */
|