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1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Copyright (C) 2017-2018, Intel Corporation
4 */
5
6#ifndef __STRATIX10_SVC_CLIENT_H
7#define __STRATIX10_SVC_CLIENT_H
8
9/*
10 * Service layer driver supports client names
11 *
12 * fpga: for FPGA configuration
13 * rsu: for remote status update
14 */
15#define SVC_CLIENT_FPGA "fpga"
16#define SVC_CLIENT_RSU "rsu"
17
18/*
19 * Status of the sent command, in bit number
20 *
21 * SVC_STATUS_OK:
22 * Secure firmware accepts the request issued by one of service clients.
23 *
24 * SVC_STATUS_BUFFER_SUBMITTED:
25 * Service client successfully submits data buffer to secure firmware.
26 *
27 * SVC_STATUS_BUFFER_DONE:
28 * Secure firmware completes data process, ready to accept the
29 * next WRITE transaction.
30 *
31 * SVC_STATUS_COMPLETED:
32 * Secure firmware completes service request successfully. In case of
33 * FPGA configuration, FPGA should be in user mode.
34 *
35 * SVC_COMMAND_STATUS_BUSY:
36 * Service request is still in process.
37 *
38 * SVC_COMMAND_STATUS_ERROR:
39 * Error encountered during the process of the service request.
40 *
41 * SVC_STATUS_NO_SUPPORT:
42 * Secure firmware doesn't support requested features such as RSU retry
43 * or RSU notify.
44 */
45#define SVC_STATUS_OK 0
46#define SVC_STATUS_BUFFER_SUBMITTED 1
47#define SVC_STATUS_BUFFER_DONE 2
48#define SVC_STATUS_COMPLETED 3
49#define SVC_STATUS_BUSY 4
50#define SVC_STATUS_ERROR 5
51#define SVC_STATUS_NO_SUPPORT 6
52
53/*
54 * Flag bit for COMMAND_RECONFIG
55 *
56 * COMMAND_RECONFIG_FLAG_PARTIAL:
57 * Set to FPGA configuration type (full or partial).
58 */
59#define COMMAND_RECONFIG_FLAG_PARTIAL 0
60
61/*
62 * Timeout settings for service clients:
63 * timeout value used in Stratix10 FPGA manager driver.
64 * timeout value used in RSU driver
65 */
66#define SVC_RECONFIG_REQUEST_TIMEOUT_MS 300
67#define SVC_RECONFIG_BUFFER_TIMEOUT_MS 720
68#define SVC_RSU_REQUEST_TIMEOUT_MS 300
69
70struct stratix10_svc_chan;
71
72/**
73 * enum stratix10_svc_command_code - supported service commands
74 *
75 * @COMMAND_NOOP: do 'dummy' request for integration/debug/trouble-shooting
76 *
77 * @COMMAND_RECONFIG: ask for FPGA configuration preparation, return status
78 * is SVC_STATUS_OK
79 *
80 * @COMMAND_RECONFIG_DATA_SUBMIT: submit buffer(s) of bit-stream data for the
81 * FPGA configuration, return status is SVC_STATUS_SUBMITTED or SVC_STATUS_ERROR
82 *
83 * @COMMAND_RECONFIG_DATA_CLAIM: check the status of the configuration, return
84 * status is SVC_STATUS_COMPLETED, or SVC_STATUS_BUSY, or SVC_STATUS_ERROR
85 *
86 * @COMMAND_RECONFIG_STATUS: check the status of the configuration, return
87 * status is SVC_STATUS_COMPLETED, or SVC_STATUS_BUSY, or SVC_STATUS_ERROR
88 *
89 * @COMMAND_RSU_STATUS: request remote system update boot log, return status
90 * is log data or SVC_STATUS_RSU_ERROR
91 *
92 * @COMMAND_RSU_UPDATE: set the offset of the bitstream to boot after reboot,
93 * return status is SVC_STATUS_OK or SVC_STATUS_ERROR
94 *
95 * @COMMAND_RSU_NOTIFY: report the status of hard processor system
96 * software to firmware, return status is SVC_STATUS_OK or
97 * SVC_STATUS_ERROR
98 *
99 * @COMMAND_RSU_RETRY: query firmware for the current image's retry counter,
100 * return status is SVC_STATUS_OK or SVC_STATUS_ERROR
101 *
102 * @COMMAND_RSU_MAX_RETRY: query firmware for the max retry value,
103 * return status is SVC_STATUS_OK or SVC_STATUS_ERROR
104 *
105 * @COMMAND_RSU_DCMF_VERSION: query firmware for the DCMF version, return status
106 * is SVC_STATUS_OK or SVC_STATUS_ERROR
107 *
108 * @COMMAND_FIRMWARE_VERSION: query running firmware version, return status
109 * is SVC_STATUS_OK or SVC_STATUS_ERROR
110 */
111enum stratix10_svc_command_code {
112 COMMAND_NOOP = 0,
113 COMMAND_RECONFIG,
114 COMMAND_RECONFIG_DATA_SUBMIT,
115 COMMAND_RECONFIG_DATA_CLAIM,
116 COMMAND_RECONFIG_STATUS,
117 COMMAND_RSU_STATUS,
118 COMMAND_RSU_UPDATE,
119 COMMAND_RSU_NOTIFY,
120 COMMAND_RSU_RETRY,
121 COMMAND_RSU_MAX_RETRY,
122 COMMAND_RSU_DCMF_VERSION,
123 COMMAND_FIRMWARE_VERSION,
124};
125
126/**
127 * struct stratix10_svc_client_msg - message sent by client to service
128 * @payload: starting address of data need be processed
129 * @payload_length: data size in bytes
130 * @command: service command
131 * @arg: args to be passed via registers and not physically mapped buffers
132 */
133struct stratix10_svc_client_msg {
134 void *payload;
135 size_t payload_length;
136 enum stratix10_svc_command_code command;
137 u64 arg[3];
138};
139
140/**
141 * struct stratix10_svc_command_config_type - config type
142 * @flags: flag bit for the type of FPGA configuration
143 */
144struct stratix10_svc_command_config_type {
145 u32 flags;
146};
147
148/**
149 * struct stratix10_svc_cb_data - callback data structure from service layer
150 * @status: the status of sent command
151 * @kaddr1: address of 1st completed data block
152 * @kaddr2: address of 2nd completed data block
153 * @kaddr3: address of 3rd completed data block
154 */
155struct stratix10_svc_cb_data {
156 u32 status;
157 void *kaddr1;
158 void *kaddr2;
159 void *kaddr3;
160};
161
162/**
163 * struct stratix10_svc_client - service client structure
164 * @dev: the client device
165 * @receive_cb: callback to provide service client the received data
166 * @priv: client private data
167 */
168struct stratix10_svc_client {
169 struct device *dev;
170 void (*receive_cb)(struct stratix10_svc_client *client,
171 struct stratix10_svc_cb_data *cb_data);
172 void *priv;
173};
174
175/**
176 * stratix10_svc_request_channel_byname() - request service channel
177 * @client: identity of the client requesting the channel
178 * @name: supporting client name defined above
179 *
180 * Return: a pointer to channel assigned to the client on success,
181 * or ERR_PTR() on error.
182 */
183struct stratix10_svc_chan
184*stratix10_svc_request_channel_byname(struct stratix10_svc_client *client,
185 const char *name);
186
187/**
188 * stratix10_svc_free_channel() - free service channel.
189 * @chan: service channel to be freed
190 */
191void stratix10_svc_free_channel(struct stratix10_svc_chan *chan);
192
193/**
194 * stratix10_svc_allocate_memory() - allocate the momory
195 * @chan: service channel assigned to the client
196 * @size: number of bytes client requests
197 *
198 * Service layer allocates the requested number of bytes from the memory
199 * pool for the client.
200 *
201 * Return: the starting address of allocated memory on success, or
202 * ERR_PTR() on error.
203 */
204void *stratix10_svc_allocate_memory(struct stratix10_svc_chan *chan,
205 size_t size);
206
207/**
208 * stratix10_svc_free_memory() - free allocated memory
209 * @chan: service channel assigned to the client
210 * @kaddr: starting address of memory to be free back to pool
211 */
212void stratix10_svc_free_memory(struct stratix10_svc_chan *chan, void *kaddr);
213
214/**
215 * stratix10_svc_send() - send a message to the remote
216 * @chan: service channel assigned to the client
217 * @msg: message data to be sent, in the format of
218 * struct stratix10_svc_client_msg
219 *
220 * Return: 0 for success, -ENOMEM or -ENOBUFS on error.
221 */
222int stratix10_svc_send(struct stratix10_svc_chan *chan, void *msg);
223
224/**
225 * stratix10_svc_done() - complete service request
226 * @chan: service channel assigned to the client
227 *
228 * This function is used by service client to inform service layer that
229 * client's service requests are completed, or there is an error in the
230 * request process.
231 */
232void stratix10_svc_done(struct stratix10_svc_chan *chan);
233#endif
234