1 /* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
3 * Copyright(c) 2016 Intel Corporation.
6 #ifndef HFI1_SDMA_TXREQ_H
7 #define HFI1_SDMA_TXREQ_H
9 /* increased for AHG */
13 * struct sdma_desc - canonical fragment descriptor
15 * This is the descriptor carried in the tx request
16 * corresponding to each fragment.
20 /* private: don't use directly */
23 /* Release reference to @pinning_ctx. May be called in interrupt context. Must not sleep. */
24 void (*ctx_put)(void *ctx);
28 * struct sdma_txreq - the sdma_txreq structure (one per packet)
29 * @list: for use by user and by queuing for wait
31 * This is the representation of a packet which consists of some
32 * number of fragments. Storage is provided to within the structure.
35 * The storage for the descriptors are automatically extended as needed
36 * when the currently allocation is exceeded.
38 * The user (Verbs or PSM) may overload this structure with fields
39 * specific to their use by putting this struct first in their struct.
40 * The method of allocation of the overloaded structure is user dependent
42 * The list is the only public field in the structure.
46 #define SDMA_TXREQ_S_OK 0
47 #define SDMA_TXREQ_S_SENDERROR 1
48 #define SDMA_TXREQ_S_ABORTED 2
49 #define SDMA_TXREQ_S_SHUTDOWN 3
52 #define SDMA_TXREQ_F_URGENT 0x0001
53 #define SDMA_TXREQ_F_AHG_COPY 0x0002
54 #define SDMA_TXREQ_F_USE_AHG 0x0004
55 #define SDMA_TXREQ_F_VIP 0x0010
58 typedef void (*callback_t)(struct sdma_txreq *, int);
62 struct list_head list;
64 struct sdma_desc *descp;
71 #ifdef CONFIG_HFI1_DEBUG_SDMA_ORDER
74 /* private: - used in coalesce/pad processing */
76 /* private: - down-counted to trigger last */
89 struct sdma_desc descs[NUM_DESC];
92 static inline int sdma_txreq_built(struct sdma_txreq *tx)
97 #endif /* HFI1_SDMA_TXREQ_H */