ism.h

 1/* SPDX-License-Identifier: GPL-2.0 */
 2/*
 3 *  Internal Shared Memory
 4 *
 5 *  Definitions for the ISM module
 6 *
 7 *  Copyright IBM Corp. 2022
 8 */
 9#ifndef _ISM_H
10#define _ISM_H
11
12#include <linux/workqueue.h>
13
14/* Unless we gain unexpected popularity, this limit should hold for a while */
15#define MAX_CLIENTS		8
16#define ISM_NR_DMBS		1920
17
18struct ism_dev {
19	spinlock_t lock; /* protects the ism device */
20	spinlock_t cmd_lock; /* serializes cmds */
21	struct list_head list;
22	struct dibs_dev *dibs;
23	struct pci_dev *pdev;
24
25	struct ism_sba *sba;
26	dma_addr_t sba_dma_addr;
27	DECLARE_BITMAP(sba_bitmap, ISM_NR_DMBS);
28	void *priv[MAX_CLIENTS];
29
30	struct ism_eq *ieq;
31	dma_addr_t ieq_dma_addr;
32
33	int ieq_idx;
34
35	struct ism_client *subs[MAX_CLIENTS];
36};
37
38struct ism_event {
39	u32 type;
40	u32 code;
41	u64 tok;
42	u64 time;
43	u64 info;
44};
45
46struct ism_client {
47	const char *name;
48	void (*handle_event)(struct ism_dev *dev, struct ism_event *event);
49	/* Private area - don't touch! */
50	u8 id;
51};
52
53int ism_register_client(struct ism_client *client);
54int  ism_unregister_client(struct ism_client *client);
55static inline void *ism_get_priv(struct ism_dev *dev,
56				 struct ism_client *client) {
57	return dev->priv[client->id];
58}
59
60static inline void ism_set_priv(struct ism_dev *dev, struct ism_client *client,
61				void *priv) {
62	dev->priv[client->id] = priv;
63}
64
65const struct smcd_ops *ism_get_smcd_ops(void);
66
67#endif	/* _ISM_H */