| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
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| 2 | /* |
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| 3 | * Internal Shared Memory |
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| 4 | * |
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| 5 | * Definitions for the ISM module |
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| 6 | * |
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| 7 | * Copyright IBM Corp. 2022 |
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| 8 | */ |
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| 9 | #ifndef _ISM_H |
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| 10 | #define _ISM_H |
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| 11 | |
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| 12 | #include <linux/workqueue.h> |
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| 13 | |
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| 14 | struct ism_dmb { |
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| 15 | u64 dmb_tok; |
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| 16 | u64 rgid; |
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| 17 | u32 dmb_len; |
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| 18 | u32 sba_idx; |
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| 19 | u32 vlan_valid; |
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| 20 | u32 vlan_id; |
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| 21 | void *cpu_addr; |
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| 22 | dma_addr_t dma_addr; |
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| 23 | }; |
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| 24 | |
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| 25 | /* Unless we gain unexpected popularity, this limit should hold for a while */ |
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| 26 | #define MAX_CLIENTS 8 |
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| 27 | #define ISM_NR_DMBS 1920 |
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| 28 | |
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| 29 | struct ism_dev { |
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| 30 | spinlock_t lock; /* protects the ism device */ |
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| 31 | struct list_head list; |
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| 32 | struct pci_dev *pdev; |
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| 33 | |
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| 34 | struct ism_sba *sba; |
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| 35 | dma_addr_t sba_dma_addr; |
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| 36 | DECLARE_BITMAP(sba_bitmap, ISM_NR_DMBS); |
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| 37 | u8 *sba_client_arr; /* entries are indices into 'clients' array */ |
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| 38 | void *priv[MAX_CLIENTS]; |
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| 39 | |
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| 40 | struct ism_eq *ieq; |
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| 41 | dma_addr_t ieq_dma_addr; |
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| 42 | |
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| 43 | struct device dev; |
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| 44 | u64 local_gid; |
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| 45 | int ieq_idx; |
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| 46 | |
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| 47 | struct ism_client *subs[MAX_CLIENTS]; |
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| 48 | }; |
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| 49 | |
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| 50 | struct ism_event { |
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| 51 | u32 type; |
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| 52 | u32 code; |
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| 53 | u64 tok; |
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| 54 | u64 time; |
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| 55 | u64 info; |
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| 56 | }; |
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| 57 | |
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| 58 | struct ism_client { |
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| 59 | const char *name; |
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| 60 | void (*add)(struct ism_dev *dev); |
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| 61 | void (*remove)(struct ism_dev *dev); |
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| 62 | void (*handle_event)(struct ism_dev *dev, struct ism_event *event); |
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| 63 | /* Parameter dmbemask contains a bit vector with updated DMBEs, if sent |
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| 64 | * via ism_move_data(). Callback function must handle all active bits |
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| 65 | * indicated by dmbemask. |
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| 66 | */ |
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| 67 | void (*handle_irq)(struct ism_dev *dev, unsigned int bit, u16 dmbemask); |
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| 68 | /* Private area - don't touch! */ |
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| 69 | u8 id; |
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| 70 | }; |
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| 71 | |
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| 72 | int ism_register_client(struct ism_client *client); |
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| 73 | int ism_unregister_client(struct ism_client *client); |
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| 74 | static inline void *ism_get_priv(struct ism_dev *dev, |
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| 75 | struct ism_client *client) { |
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| 76 | return dev->priv[client->id]; |
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| 77 | } |
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| 78 | |
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| 79 | static inline void ism_set_priv(struct ism_dev *dev, struct ism_client *client, |
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| 80 | void *priv) { |
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| 81 | dev->priv[client->id] = priv; |
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| 82 | } |
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| 83 | |
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| 84 | int ism_register_dmb(struct ism_dev *dev, struct ism_dmb *dmb, |
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| 85 | struct ism_client *client); |
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| 86 | int ism_unregister_dmb(struct ism_dev *dev, struct ism_dmb *dmb); |
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| 87 | int ism_move(struct ism_dev *dev, u64 dmb_tok, unsigned int idx, bool sf, |
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| 88 | unsigned int offset, void *data, unsigned int size); |
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| 89 | |
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| 90 | const struct smcd_ops *ism_get_smcd_ops(void); |
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| 91 | |
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| 92 | #endif /* _ISM_H */ |
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| 93 | |
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