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 struct smcd_dev *smcd; 34 35 struct ism_sba *sba; 36 dma_addr_t sba_dma_addr; 37 DECLARE_BITMAP(sba_bitmap, ISM_NR_DMBS); 38 u8 *sba_client_arr; /* entries are indices into 'clients' array */ 39 void *priv[MAX_CLIENTS]; 40 41 struct ism_eq *ieq; 42 dma_addr_t ieq_dma_addr; 43 44 struct device dev; 45 u64 local_gid; 46 int ieq_idx; 47 48 atomic_t free_clients_cnt; 49 atomic_t add_dev_cnt; 50 wait_queue_head_t waitq; 51 }; 52 53 struct ism_event { 54 u32 type; 55 u32 code; 56 u64 tok; 57 u64 time; 58 u64 info; 59 }; 60 61 struct ism_client { 62 const char *name; 63 void (*add)(struct ism_dev *dev); 64 void (*remove)(struct ism_dev *dev); 65 void (*handle_event)(struct ism_dev *dev, struct ism_event *event); 66 /* Parameter dmbemask contains a bit vector with updated DMBEs, if sent 67 * via ism_move_data(). Callback function must handle all active bits 68 * indicated by dmbemask. 69 */ 70 void (*handle_irq)(struct ism_dev *dev, unsigned int bit, u16 dmbemask); 71 /* Private area - don't touch! */ 72 struct work_struct remove_work; 73 struct work_struct add_work; 74 struct ism_dev *tgt_ism; 75 u8 id; 76 }; 77 78 int ism_register_client(struct ism_client *client); 79 int ism_unregister_client(struct ism_client *client); 80 static inline void *ism_get_priv(struct ism_dev *dev, 81 struct ism_client *client) { 82 return dev->priv[client->id]; 83 } 84 85 static inline void ism_set_priv(struct ism_dev *dev, struct ism_client *client, 86 void *priv) { 87 dev->priv[client->id] = priv; 88 } 89 90 #endif /* _ISM_H */ 91