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 | struct ism_dmb { |
15 | u64 dmb_tok; |
16 | u64 rgid; |
17 | u32 dmb_len; |
18 | u32 sba_idx; |
19 | u32 vlan_valid; |
20 | u32 vlan_id; |
21 | void *cpu_addr; |
22 | dma_addr_t dma_addr; |
23 | }; |
24 | |
25 | /* Unless we gain unexpected popularity, this limit should hold for a while */ |
26 | #define MAX_CLIENTS 8 |
27 | #define ISM_NR_DMBS 1920 |
28 | |
29 | struct ism_dev { |
30 | spinlock_t lock; /* protects the ism device */ |
31 | struct list_head list; |
32 | struct pci_dev *pdev; |
33 | |
34 | struct ism_sba *sba; |
35 | dma_addr_t sba_dma_addr; |
36 | DECLARE_BITMAP(sba_bitmap, ISM_NR_DMBS); |
37 | u8 *sba_client_arr; /* entries are indices into 'clients' array */ |
38 | void *priv[MAX_CLIENTS]; |
39 | |
40 | struct ism_eq *ieq; |
41 | dma_addr_t ieq_dma_addr; |
42 | |
43 | struct device dev; |
44 | u64 local_gid; |
45 | int ieq_idx; |
46 | |
47 | struct ism_client *subs[MAX_CLIENTS]; |
48 | }; |
49 | |
50 | struct ism_event { |
51 | u32 type; |
52 | u32 code; |
53 | u64 tok; |
54 | u64 time; |
55 | u64 info; |
56 | }; |
57 | |
58 | struct ism_client { |
59 | const char *name; |
60 | void (*add)(struct ism_dev *dev); |
61 | void (*remove)(struct ism_dev *dev); |
62 | void (*handle_event)(struct ism_dev *dev, struct ism_event *event); |
63 | /* Parameter dmbemask contains a bit vector with updated DMBEs, if sent |
64 | * via ism_move_data(). Callback function must handle all active bits |
65 | * indicated by dmbemask. |
66 | */ |
67 | void (*handle_irq)(struct ism_dev *dev, unsigned int bit, u16 dmbemask); |
68 | /* Private area - don't touch! */ |
69 | u8 id; |
70 | }; |
71 | |
72 | int ism_register_client(struct ism_client *client); |
73 | int ism_unregister_client(struct ism_client *client); |
74 | static inline void *ism_get_priv(struct ism_dev *dev, |
75 | struct ism_client *client) { |
76 | return dev->priv[client->id]; |
77 | } |
78 | |
79 | static inline void ism_set_priv(struct ism_dev *dev, struct ism_client *client, |
80 | void *priv) { |
81 | dev->priv[client->id] = priv; |
82 | } |
83 | |
84 | int ism_register_dmb(struct ism_dev *dev, struct ism_dmb *dmb, |
85 | struct ism_client *client); |
86 | int ism_unregister_dmb(struct ism_dev *dev, struct ism_dmb *dmb); |
87 | int ism_move(struct ism_dev *dev, u64 dmb_tok, unsigned int idx, bool sf, |
88 | unsigned int offset, void *data, unsigned int size); |
89 | u8 *ism_get_seid(void); |
90 | |
91 | const struct smcd_ops *ism_get_smcd_ops(void); |
92 | |
93 | #endif /* _ISM_H */ |
94 | |