1 /* 2 * Greybus Host Device 3 * 4 * Copyright 2014-2015 Google Inc. 5 * Copyright 2014-2015 Linaro Ltd. 6 * 7 * Released under the GPLv2 only. 8 */ 9 10 #ifndef __HD_H 11 #define __HD_H 12 13 struct gb_host_device; 14 struct gb_message; 15 16 struct gb_hd_driver { 17 size_t hd_priv_size; 18 19 int (*cport_allocate)(struct gb_host_device *hd, int cport_id, 20 unsigned long flags); 21 void (*cport_release)(struct gb_host_device *hd, u16 cport_id); 22 int (*cport_enable)(struct gb_host_device *hd, u16 cport_id, 23 unsigned long flags); 24 int (*cport_disable)(struct gb_host_device *hd, u16 cport_id); 25 int (*cport_connected)(struct gb_host_device *hd, u16 cport_id); 26 int (*cport_flush)(struct gb_host_device *hd, u16 cport_id); 27 int (*cport_shutdown)(struct gb_host_device *hd, u16 cport_id, 28 u8 phase, unsigned int timeout); 29 int (*cport_quiesce)(struct gb_host_device *hd, u16 cport_id, 30 size_t peer_space, unsigned int timeout); 31 int (*cport_clear)(struct gb_host_device *hd, u16 cport_id); 32 33 int (*message_send)(struct gb_host_device *hd, u16 dest_cport_id, 34 struct gb_message *message, gfp_t gfp_mask); 35 void (*message_cancel)(struct gb_message *message); 36 int (*latency_tag_enable)(struct gb_host_device *hd, u16 cport_id); 37 int (*latency_tag_disable)(struct gb_host_device *hd, u16 cport_id); 38 int (*output)(struct gb_host_device *hd, void *req, u16 size, u8 cmd, 39 bool async); 40 }; 41 42 struct gb_host_device { 43 struct device dev; 44 int bus_id; 45 const struct gb_hd_driver *driver; 46 47 struct list_head modules; 48 struct list_head connections; 49 struct ida cport_id_map; 50 51 /* Number of CPorts supported by the UniPro IP */ 52 size_t num_cports; 53 54 /* Host device buffer constraints */ 55 size_t buffer_size_max; 56 57 struct gb_svc *svc; 58 /* Private data for the host driver */ 59 unsigned long hd_priv[0] __aligned(sizeof(s64)); 60 }; 61 #define to_gb_host_device(d) container_of(d, struct gb_host_device, dev) 62 63 int gb_hd_cport_reserve(struct gb_host_device *hd, u16 cport_id); 64 void gb_hd_cport_release_reserved(struct gb_host_device *hd, u16 cport_id); 65 int gb_hd_cport_allocate(struct gb_host_device *hd, int cport_id, 66 unsigned long flags); 67 void gb_hd_cport_release(struct gb_host_device *hd, u16 cport_id); 68 69 struct gb_host_device *gb_hd_create(struct gb_hd_driver *driver, 70 struct device *parent, 71 size_t buffer_size_max, 72 size_t num_cports); 73 int gb_hd_add(struct gb_host_device *hd); 74 void gb_hd_del(struct gb_host_device *hd); 75 void gb_hd_shutdown(struct gb_host_device *hd); 76 void gb_hd_put(struct gb_host_device *hd); 77 int gb_hd_output(struct gb_host_device *hd, void *req, u16 size, u8 cmd, 78 bool in_irq); 79 80 int gb_hd_init(void); 81 void gb_hd_exit(void); 82 83 #endif /* __HD_H */ 84