include/linux/intel-ish-client-if.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Intel ISH client Interface definitions
   4  *
   5  * Copyright (c) 2019, Intel Corporation.
   6  */
   7
   8 #ifndef _INTEL_ISH_CLIENT_IF_H_
   9 #define _INTEL_ISH_CLIENT_IF_H_
  10
  11 struct ishtp_cl_device;
  12 struct ishtp_device;
  13 struct ishtp_cl;
  14 struct ishtp_fw_client;
  15
  16 /* Client state */
  17 enum cl_state {
  18         ISHTP_CL_INITIALIZING = 0,
  19         ISHTP_CL_CONNECTING,
  20         ISHTP_CL_CONNECTED,
  21         ISHTP_CL_DISCONNECTING,
  22         ISHTP_CL_DISCONNECTED
  23 };
  24
  25 /**
  26  * struct ishtp_cl_device - ISHTP device handle
  27  * @driver:     driver instance on a bus
  28  * @name:       Name of the device for probe
  29  * @probe:      driver callback for device probe
  30  * @remove:     driver callback on device removal
  31  *
  32  * Client drivers defines to get probed/removed for ISHTP client device.
  33  */
  34 struct ishtp_cl_driver {
  35         struct device_driver driver;
  36         const char *name;
  37         const guid_t *guid;
  38         int (*probe)(struct ishtp_cl_device *dev);
  39         int (*remove)(struct ishtp_cl_device *dev);
  40         int (*reset)(struct ishtp_cl_device *dev);
  41         const struct dev_pm_ops *pm;
  42 };
  43
  44 /**
  45  * struct ishtp_msg_data - ISHTP message data struct
  46  * @size:       Size of data in the *data
  47  * @data:       Pointer to data
  48  */
  49 struct ishtp_msg_data {
  50         uint32_t size;
  51         unsigned char *data;
  52 };
  53
  54 /*
  55  * struct ishtp_cl_rb - request block structure
  56  * @list:       Link to list members
  57  * @cl:         ISHTP client instance
  58  * @buffer:     message header
  59  * @buf_idx:    Index into buffer
  60  * @read_time:   unused at this time
  61  */
  62 struct ishtp_cl_rb {
  63         struct list_head list;
  64         struct ishtp_cl *cl;
  65         struct ishtp_msg_data buffer;
  66         unsigned long buf_idx;
  67         unsigned long read_time;
  68 };
  69
  70 int ishtp_cl_driver_register(struct ishtp_cl_driver *driver,
  71                              struct module *owner);
  72 void ishtp_cl_driver_unregister(struct ishtp_cl_driver *driver);
  73 int ishtp_register_event_cb(struct ishtp_cl_device *device,
  74                             void (*read_cb)(struct ishtp_cl_device *));
  75
  76 /* Get the device * from ishtp device instance */
  77 struct device *ishtp_device(struct ishtp_cl_device *cl_device);
  78 /* Trace interface for clients */
  79 void *ishtp_trace_callback(struct ishtp_cl_device *cl_device);
  80 /* Get device pointer of PCI device for DMA acces */
  81 struct device *ishtp_get_pci_device(struct ishtp_cl_device *cl_device);
  82
  83 struct ishtp_cl *ishtp_cl_allocate(struct ishtp_cl_device *cl_device);
  84 void ishtp_cl_free(struct ishtp_cl *cl);
  85 int ishtp_cl_link(struct ishtp_cl *cl);
  86 void ishtp_cl_unlink(struct ishtp_cl *cl);
  87 int ishtp_cl_disconnect(struct ishtp_cl *cl);
  88 int ishtp_cl_connect(struct ishtp_cl *cl);
  89 int ishtp_cl_send(struct ishtp_cl *cl, uint8_t *buf, size_t length);
  90 int ishtp_cl_flush_queues(struct ishtp_cl *cl);
  91 int ishtp_cl_io_rb_recycle(struct ishtp_cl_rb *rb);
  92 bool ishtp_cl_tx_empty(struct ishtp_cl *cl);
  93 struct ishtp_cl_rb *ishtp_cl_rx_get_rb(struct ishtp_cl *cl);
  94 void *ishtp_get_client_data(struct ishtp_cl *cl);
  95 void ishtp_set_client_data(struct ishtp_cl *cl, void *data);
  96 struct ishtp_device *ishtp_get_ishtp_device(struct ishtp_cl *cl);
  97 void ishtp_set_tx_ring_size(struct ishtp_cl *cl, int size);
  98 void ishtp_set_rx_ring_size(struct ishtp_cl *cl, int size);
  99 void ishtp_set_connection_state(struct ishtp_cl *cl, int state);
 100 void ishtp_cl_set_fw_client_id(struct ishtp_cl *cl, int fw_client_id);
 101
 102 void ishtp_put_device(struct ishtp_cl_device *cl_dev);
 103 void ishtp_get_device(struct ishtp_cl_device *cl_dev);
 104 void ishtp_set_drvdata(struct ishtp_cl_device *cl_device, void *data);
 105 void *ishtp_get_drvdata(struct ishtp_cl_device *cl_device);
 106 struct ishtp_cl_device *ishtp_dev_to_cl_device(struct device *dev);
 107 int ishtp_register_event_cb(struct ishtp_cl_device *device,
 108                                 void (*read_cb)(struct ishtp_cl_device *));
 109 struct  ishtp_fw_client *ishtp_fw_cl_get_client(struct ishtp_device *dev,
 110                                                 const guid_t *uuid);
 111 int ishtp_get_fw_client_id(struct ishtp_fw_client *fw_client);
 112 int ish_hw_reset(struct ishtp_device *dev);
 113 #endif /* _INTEL_ISH_CLIENT_IF_H_ */