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ab841160 OW |
1 | /* |
2 | * | |
3 | * Intel Management Engine Interface (Intel MEI) Linux driver | |
733ba91c | 4 | * Copyright (c) 2003-2012, Intel Corporation. |
ab841160 OW |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms and conditions of the GNU General Public License, | |
8 | * version 2, as published by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed in the hope it will be useful, but WITHOUT | |
11 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
12 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
13 | * more details. | |
14 | * | |
15 | */ | |
16 | ||
17 | #ifndef _MEI_DEV_H_ | |
18 | #define _MEI_DEV_H_ | |
19 | ||
20 | #include <linux/types.h> | |
9ce178e5 | 21 | #include <linux/watchdog.h> |
4f3afe1d | 22 | #include <linux/mei.h> |
ab841160 OW |
23 | #include "hw.h" |
24 | ||
ab841160 OW |
25 | /* |
26 | * watch dog definition | |
27 | */ | |
248ffdf7 TW |
28 | #define MEI_WD_HDR_SIZE 4 |
29 | #define MEI_WD_STOP_MSG_SIZE MEI_WD_HDR_SIZE | |
30 | #define MEI_WD_START_MSG_SIZE (MEI_WD_HDR_SIZE + 16) | |
31 | ||
32 | #define MEI_WD_DEFAULT_TIMEOUT 120 /* seconds */ | |
33 | #define MEI_WD_MIN_TIMEOUT 120 /* seconds */ | |
34 | #define MEI_WD_MAX_TIMEOUT 65535 /* seconds */ | |
35 | ||
c216fdeb TW |
36 | #define MEI_WD_STOP_TIMEOUT 10 /* msecs */ |
37 | ||
ab841160 OW |
38 | #define MEI_WD_STATE_INDEPENDENCE_MSG_SENT (1 << 0) |
39 | ||
edf1eed4 TW |
40 | #define MEI_RD_MSG_BUF_SIZE (128 * sizeof(u32)) |
41 | ||
9ce178e5 | 42 | |
ab841160 OW |
43 | /* |
44 | * AMTHI Client UUID | |
45 | */ | |
46 | extern const uuid_le mei_amthi_guid; | |
47 | ||
48 | /* | |
49 | * Watchdog Client UUID | |
50 | */ | |
51 | extern const uuid_le mei_wd_guid; | |
52 | ||
53 | /* | |
54 | * Watchdog independence state message | |
55 | */ | |
56 | extern const u8 mei_wd_state_independence_msg[3][4]; | |
57 | ||
1e2776c3 TW |
58 | /* |
59 | * Number of Maximum MEI Clients | |
60 | */ | |
61 | #define MEI_CLIENTS_MAX 256 | |
62 | ||
ab841160 OW |
63 | /* |
64 | * Number of File descriptors/handles | |
65 | * that can be opened to the driver. | |
66 | * | |
1e2776c3 TW |
67 | * Limit to 253: 256 Total Clients |
68 | * minus internal client for MEI Bus Messags | |
ab841160 OW |
69 | * minus internal client for AMTHI |
70 | * minus internal client for Watchdog | |
71 | */ | |
1e2776c3 | 72 | #define MEI_MAX_OPEN_HANDLE_COUNT (MEI_CLIENTS_MAX - 3) |
ab841160 | 73 | |
ab841160 OW |
74 | |
75 | /* File state */ | |
76 | enum file_state { | |
77 | MEI_FILE_INITIALIZING = 0, | |
78 | MEI_FILE_CONNECTING, | |
79 | MEI_FILE_CONNECTED, | |
80 | MEI_FILE_DISCONNECTING, | |
81 | MEI_FILE_DISCONNECTED | |
82 | }; | |
83 | ||
84 | /* MEI device states */ | |
b210d750 TW |
85 | enum mei_dev_state { |
86 | MEI_DEV_INITIALIZING = 0, | |
87 | MEI_DEV_INIT_CLIENTS, | |
88 | MEI_DEV_ENABLED, | |
89 | MEI_DEV_RESETING, | |
90 | MEI_DEV_DISABLED, | |
91 | MEI_DEV_RECOVERING_FROM_RESET, | |
92 | MEI_DEV_POWER_DOWN, | |
93 | MEI_DEV_POWER_UP | |
ab841160 OW |
94 | }; |
95 | ||
b210d750 TW |
96 | const char *mei_dev_state_str(int state); |
97 | ||
5f9092f3 | 98 | /* init clients states*/ |
ab841160 OW |
99 | enum mei_init_clients_states { |
100 | MEI_START_MESSAGE = 0, | |
101 | MEI_ENUM_CLIENTS_MESSAGE, | |
102 | MEI_CLIENT_PROPERTIES_MESSAGE | |
103 | }; | |
104 | ||
105 | enum iamthif_states { | |
106 | MEI_IAMTHIF_IDLE, | |
107 | MEI_IAMTHIF_WRITING, | |
108 | MEI_IAMTHIF_FLOW_CONTROL, | |
109 | MEI_IAMTHIF_READING, | |
110 | MEI_IAMTHIF_READ_COMPLETE | |
111 | }; | |
112 | ||
113 | enum mei_file_transaction_states { | |
114 | MEI_IDLE, | |
115 | MEI_WRITING, | |
116 | MEI_WRITE_COMPLETE, | |
117 | MEI_FLOW_CONTROL, | |
118 | MEI_READING, | |
119 | MEI_READ_COMPLETE | |
120 | }; | |
121 | ||
c216fdeb TW |
122 | enum mei_wd_states { |
123 | MEI_WD_IDLE, | |
124 | MEI_WD_RUNNING, | |
125 | MEI_WD_STOPPING, | |
126 | }; | |
127 | ||
4b8960b4 TW |
128 | /** |
129 | * enum mei_cb_file_ops - file operation associated with the callback | |
130 | * @MEI_FOP_READ - read | |
131 | * @MEI_FOP_WRITE - write | |
132 | * @MEI_FOP_IOCTL - ioctl | |
133 | * @MEI_FOP_OPEN - open | |
134 | * @MEI_FOP_CLOSE - close | |
135 | */ | |
136 | enum mei_cb_file_ops { | |
137 | MEI_FOP_READ = 0, | |
138 | MEI_FOP_WRITE, | |
139 | MEI_FOP_IOCTL, | |
140 | MEI_FOP_OPEN, | |
141 | MEI_FOP_CLOSE | |
ab841160 OW |
142 | }; |
143 | ||
144 | /* | |
145 | * Intel MEI message data struct | |
146 | */ | |
147 | struct mei_message_data { | |
148 | u32 size; | |
edf1eed4 | 149 | unsigned char *data; |
f060939d | 150 | }; |
ab841160 OW |
151 | |
152 | ||
db3ed431 TW |
153 | struct mei_cl; |
154 | ||
4b8960b4 | 155 | /** |
db3ed431 TW |
156 | * struct mei_cl_cb - file operation callback structure |
157 | * | |
158 | * @cl - file client who is running this operation | |
4b8960b4 | 159 | * @fop_type - file operation type |
db3ed431 | 160 | */ |
ab841160 | 161 | struct mei_cl_cb { |
fb601adb | 162 | struct list_head list; |
db3ed431 | 163 | struct mei_cl *cl; |
4b8960b4 | 164 | enum mei_cb_file_ops fop_type; |
ab841160 OW |
165 | struct mei_message_data request_buffer; |
166 | struct mei_message_data response_buffer; | |
ebb108ef | 167 | unsigned long buf_idx; |
ab841160 OW |
168 | unsigned long read_time; |
169 | struct file *file_object; | |
170 | }; | |
171 | ||
172 | /* MEI client instance carried as file->pirvate_data*/ | |
173 | struct mei_cl { | |
174 | struct list_head link; | |
175 | struct mei_device *dev; | |
176 | enum file_state state; | |
177 | wait_queue_head_t tx_wait; | |
178 | wait_queue_head_t rx_wait; | |
179 | wait_queue_head_t wait; | |
180 | int read_pending; | |
181 | int status; | |
182 | /* ID of client connected */ | |
183 | u8 host_client_id; | |
184 | u8 me_client_id; | |
185 | u8 mei_flow_ctrl_creds; | |
186 | u8 timer_count; | |
187 | enum mei_file_transaction_states reading_state; | |
188 | enum mei_file_transaction_states writing_state; | |
189 | int sm_state; | |
190 | struct mei_cl_cb *read_cb; | |
191 | }; | |
192 | ||
24aadc80 TW |
193 | /** |
194 | * struct mei_deive - MEI private device struct | |
195 | * @hbuf_depth - depth of host(write) buffer | |
196 | */ | |
ab841160 OW |
197 | struct mei_device { |
198 | struct pci_dev *pdev; /* pointer to pci device struct */ | |
199 | /* | |
200 | * lists of queues | |
201 | */ | |
e773efc4 | 202 | /* array of pointers to aio lists */ |
fb601adb TW |
203 | struct mei_cl_cb read_list; /* driver read queue */ |
204 | struct mei_cl_cb write_list; /* driver write queue */ | |
205 | struct mei_cl_cb write_waiting_list; /* write waiting queue */ | |
206 | struct mei_cl_cb ctrl_wr_list; /* managed write IOCTL list */ | |
207 | struct mei_cl_cb ctrl_rd_list; /* managed read IOCTL list */ | |
ab841160 | 208 | |
ab841160 OW |
209 | /* |
210 | * list of files | |
211 | */ | |
212 | struct list_head file_list; | |
eb9af0ac | 213 | long open_handle_count; |
ab841160 OW |
214 | /* |
215 | * memory of device | |
216 | */ | |
217 | unsigned int mem_base; | |
218 | unsigned int mem_length; | |
219 | void __iomem *mem_addr; | |
220 | /* | |
221 | * lock for the device | |
222 | */ | |
223 | struct mutex device_lock; /* device lock */ | |
a61c6530 | 224 | struct delayed_work timer_work; /* MEI timer delayed work (timeouts) */ |
eb9af0ac | 225 | bool recvd_msg; |
ab841160 OW |
226 | /* |
227 | * hw states of host and fw(ME) | |
228 | */ | |
229 | u32 host_hw_state; | |
230 | u32 me_hw_state; | |
24aadc80 | 231 | u8 hbuf_depth; |
ab841160 OW |
232 | /* |
233 | * waiting queue for receive message from FW | |
234 | */ | |
235 | wait_queue_head_t wait_recvd_msg; | |
236 | wait_queue_head_t wait_stop_wd; | |
237 | ||
238 | /* | |
239 | * mei device states | |
240 | */ | |
b210d750 | 241 | enum mei_dev_state dev_state; |
ab841160 OW |
242 | enum mei_init_clients_states init_clients_state; |
243 | u16 init_clients_timer; | |
eb9af0ac | 244 | bool need_reset; |
ab841160 OW |
245 | |
246 | u32 extra_write_index; | |
edf1eed4 | 247 | unsigned char rd_msg_buf[MEI_RD_MSG_BUF_SIZE]; /* control messages */ |
ab841160 OW |
248 | u32 wr_msg_buf[128]; /* used for control messages */ |
249 | u32 ext_msg_buf[8]; /* for control responses */ | |
250 | u32 rd_msg_hdr; | |
251 | ||
252 | struct hbm_version version; | |
253 | ||
ab841160 OW |
254 | struct mei_me_client *me_clients; /* Note: memory has to be allocated */ |
255 | DECLARE_BITMAP(me_clients_map, MEI_CLIENTS_MAX); | |
256 | DECLARE_BITMAP(host_clients_map, MEI_CLIENTS_MAX); | |
cf9673da | 257 | u8 me_clients_num; |
ab841160 OW |
258 | u8 me_client_presentation_num; |
259 | u8 me_client_index; | |
eb9af0ac | 260 | bool mei_host_buffer_is_empty; |
ab841160 | 261 | |
eb9af0ac | 262 | struct mei_cl wd_cl; |
c216fdeb | 263 | enum mei_wd_states wd_state; |
eb9af0ac | 264 | bool wd_pending; |
c216fdeb | 265 | u16 wd_timeout; |
248ffdf7 | 266 | unsigned char wd_data[MEI_WD_START_MSG_SIZE]; |
ab841160 OW |
267 | |
268 | ||
e773efc4 TW |
269 | /* amthif list for cmd waiting */ |
270 | struct mei_cl_cb amthif_cmd_list; | |
271 | /* driver managed amthif list for reading completed amthif cmd data */ | |
272 | struct mei_cl_cb amthif_rd_complete_list; | |
ab841160 OW |
273 | struct file *iamthif_file_object; |
274 | struct mei_cl iamthif_cl; | |
eb9af0ac | 275 | struct mei_cl_cb *iamthif_current_cb; |
ab841160 OW |
276 | int iamthif_mtu; |
277 | unsigned long iamthif_timer; | |
278 | u32 iamthif_stall_timer; | |
279 | unsigned char *iamthif_msg_buf; /* Note: memory has to be allocated */ | |
280 | u32 iamthif_msg_buf_size; | |
281 | u32 iamthif_msg_buf_index; | |
ab841160 | 282 | enum iamthif_states iamthif_state; |
eb9af0ac TW |
283 | bool iamthif_flow_control_pending; |
284 | bool iamthif_ioctl; | |
285 | bool iamthif_canceled; | |
ab841160 OW |
286 | }; |
287 | ||
3870c320 TW |
288 | static inline unsigned long mei_secs_to_jiffies(unsigned long sec) |
289 | { | |
290 | return msecs_to_jiffies(sec * MSEC_PER_SEC); | |
291 | } | |
292 | ||
ab841160 OW |
293 | |
294 | /* | |
295 | * mei init function prototypes | |
296 | */ | |
c95efb74 | 297 | struct mei_device *mei_device_init(struct pci_dev *pdev); |
ab841160 OW |
298 | void mei_reset(struct mei_device *dev, int interrupts); |
299 | int mei_hw_init(struct mei_device *dev); | |
300 | int mei_task_initialize_clients(void *data); | |
301 | int mei_initialize_clients(struct mei_device *dev); | |
ab841160 | 302 | int mei_disconnect_host_client(struct mei_device *dev, struct mei_cl *cl); |
106fb49f | 303 | void mei_remove_client_from_file_list(struct mei_device *dev, u8 host_client_id); |
c95efb74 | 304 | void mei_allocate_me_clients_storage(struct mei_device *dev); |
ab841160 | 305 | |
ab841160 | 306 | |
07b509b7 TW |
307 | int mei_me_cl_update_filext(struct mei_device *dev, struct mei_cl *cl, |
308 | const uuid_le *cguid, u8 host_client_id); | |
309 | int mei_me_cl_by_uuid(const struct mei_device *dev, const uuid_le *cuuid); | |
310 | int mei_me_cl_by_id(struct mei_device *dev, u8 client_id); | |
ab841160 | 311 | |
0288c7c9 | 312 | /* |
601a1efa | 313 | * MEI IO Functions |
0288c7c9 | 314 | */ |
664df38b | 315 | struct mei_cl_cb *mei_io_cb_init(struct mei_cl *cl, struct file *fp); |
601a1efa | 316 | void mei_io_cb_free(struct mei_cl_cb *priv_cb); |
664df38b TW |
317 | int mei_io_cb_alloc_req_buf(struct mei_cl_cb *cb, size_t length); |
318 | int mei_io_cb_alloc_resp_buf(struct mei_cl_cb *cb, size_t length); | |
319 | ||
601a1efa | 320 | |
fb601adb TW |
321 | /** |
322 | * mei_io_list_init - Sets up a queue list. | |
323 | * | |
324 | * @list: An instance cl callback structure | |
325 | */ | |
326 | static inline void mei_io_list_init(struct mei_cl_cb *list) | |
327 | { | |
328 | INIT_LIST_HEAD(&list->list); | |
329 | } | |
330 | void mei_io_list_flush(struct mei_cl_cb *list, struct mei_cl *cl); | |
0288c7c9 | 331 | |
ab841160 | 332 | /* |
c95efb74 TW |
333 | * MEI ME Client Functions |
334 | */ | |
335 | ||
336 | struct mei_cl *mei_cl_allocate(struct mei_device *dev); | |
0288c7c9 TW |
337 | void mei_cl_init(struct mei_cl *cl, struct mei_device *dev); |
338 | int mei_cl_flush_queues(struct mei_cl *cl); | |
339 | /** | |
340 | * mei_cl_cmp_id - tells if file private data have same id | |
341 | * | |
342 | * @fe1: private data of 1. file object | |
343 | * @fe2: private data of 2. file object | |
344 | * | |
345 | * returns true - if ids are the same and not NULL | |
346 | */ | |
347 | static inline bool mei_cl_cmp_id(const struct mei_cl *cl1, | |
348 | const struct mei_cl *cl2) | |
349 | { | |
350 | return cl1 && cl2 && | |
351 | (cl1->host_client_id == cl2->host_client_id) && | |
352 | (cl1->me_client_id == cl2->me_client_id); | |
353 | } | |
354 | ||
c95efb74 TW |
355 | |
356 | ||
357 | /* | |
358 | * MEI Host Client Functions | |
359 | */ | |
360 | void mei_host_start_message(struct mei_device *dev); | |
361 | void mei_host_enum_clients_message(struct mei_device *dev); | |
abc51b6d | 362 | int mei_host_client_properties(struct mei_device *dev); |
c95efb74 TW |
363 | |
364 | /* | |
365 | * MEI interrupt functions prototype | |
ab841160 OW |
366 | */ |
367 | irqreturn_t mei_interrupt_quick_handler(int irq, void *dev_id); | |
c95efb74 | 368 | irqreturn_t mei_interrupt_thread_handler(int irq, void *dev_id); |
a61c6530 | 369 | void mei_timer(struct work_struct *work); |
ab841160 OW |
370 | |
371 | /* | |
c95efb74 | 372 | * MEI input output function prototype |
ab841160 OW |
373 | */ |
374 | int mei_ioctl_connect_client(struct file *file, | |
375 | struct mei_connect_client_data *data); | |
376 | ||
377 | int mei_start_read(struct mei_device *dev, struct mei_cl *cl); | |
378 | ||
ab841160 | 379 | |
19838fb8 TW |
380 | /* |
381 | * AMTHIF - AMT Host Interface Functions | |
382 | */ | |
383 | void mei_amthif_reset_params(struct mei_device *dev); | |
384 | ||
385 | void mei_amthif_host_init(struct mei_device *dev); | |
386 | ||
387 | int mei_amthif_write(struct mei_device *dev, struct mei_cl_cb *priv_cb); | |
388 | ||
389 | int mei_amthif_read(struct mei_device *dev, struct file *file, | |
ab841160 OW |
390 | char __user *ubuf, size_t length, loff_t *offset); |
391 | ||
19838fb8 | 392 | struct mei_cl_cb *mei_amthif_find_read_list_entry(struct mei_device *dev, |
ab841160 OW |
393 | struct file *file); |
394 | ||
19838fb8 TW |
395 | void mei_amthif_run_next_cmd(struct mei_device *dev); |
396 | ||
397 | ||
398 | int mei_amthif_read_message(struct mei_cl_cb *complete_list, | |
399 | struct mei_device *dev, struct mei_msg_hdr *mei_hdr); | |
ab841160 | 400 | |
19838fb8 TW |
401 | int mei_amthif_irq_process_completed(struct mei_device *dev, s32 *slots, |
402 | struct mei_cl_cb *cb_pos, | |
403 | struct mei_cl *cl, | |
404 | struct mei_cl_cb *cmpl_list); | |
ab841160 | 405 | |
19838fb8 TW |
406 | void mei_amthif_complete(struct mei_device *dev, struct mei_cl_cb *cb); |
407 | int mei_amthif_irq_read_message(struct mei_cl_cb *complete_list, | |
408 | struct mei_device *dev, struct mei_msg_hdr *mei_hdr); | |
409 | int mei_amthif_irq_read(struct mei_device *dev, s32 *slots); | |
ab841160 OW |
410 | |
411 | /* | |
412 | * Register Access Function | |
413 | */ | |
414 | ||
415 | /** | |
416 | * mei_reg_read - Reads 32bit data from the mei device | |
417 | * | |
418 | * @dev: the device structure | |
419 | * @offset: offset from which to read the data | |
420 | * | |
92eb4013 | 421 | * returns register value (u32) |
ab841160 | 422 | */ |
4a0d6a74 TW |
423 | static inline u32 mei_reg_read(const struct mei_device *dev, |
424 | unsigned long offset) | |
ab841160 OW |
425 | { |
426 | return ioread32(dev->mem_addr + offset); | |
427 | } | |
428 | ||
429 | /** | |
430 | * mei_reg_write - Writes 32bit data to the mei device | |
431 | * | |
432 | * @dev: the device structure | |
433 | * @offset: offset from which to write the data | |
92eb4013 | 434 | * @value: register value to write (u32) |
ab841160 | 435 | */ |
4a0d6a74 TW |
436 | static inline void mei_reg_write(const struct mei_device *dev, |
437 | unsigned long offset, u32 value) | |
ab841160 OW |
438 | { |
439 | iowrite32(value, dev->mem_addr + offset); | |
440 | } | |
441 | ||
442 | /** | |
443 | * mei_hcsr_read - Reads 32bit data from the host CSR | |
444 | * | |
445 | * @dev: the device structure | |
446 | * | |
447 | * returns the byte read. | |
448 | */ | |
4a0d6a74 | 449 | static inline u32 mei_hcsr_read(const struct mei_device *dev) |
ab841160 OW |
450 | { |
451 | return mei_reg_read(dev, H_CSR); | |
452 | } | |
453 | ||
454 | /** | |
455 | * mei_mecsr_read - Reads 32bit data from the ME CSR | |
456 | * | |
457 | * @dev: the device structure | |
458 | * | |
459 | * returns ME_CSR_HA register value (u32) | |
460 | */ | |
4a0d6a74 | 461 | static inline u32 mei_mecsr_read(const struct mei_device *dev) |
ab841160 OW |
462 | { |
463 | return mei_reg_read(dev, ME_CSR_HA); | |
464 | } | |
465 | ||
466 | /** | |
467 | * get_me_cb_rw - Reads 32bit data from the mei ME_CB_RW register | |
468 | * | |
469 | * @dev: the device structure | |
470 | * | |
471 | * returns ME_CB_RW register value (u32) | |
472 | */ | |
4a0d6a74 | 473 | static inline u32 mei_mecbrw_read(const struct mei_device *dev) |
ab841160 OW |
474 | { |
475 | return mei_reg_read(dev, ME_CB_RW); | |
476 | } | |
477 | ||
478 | ||
479 | /* | |
480 | * mei interface function prototypes | |
481 | */ | |
482 | void mei_hcsr_set(struct mei_device *dev); | |
483 | void mei_csr_clear_his(struct mei_device *dev); | |
484 | ||
485 | void mei_enable_interrupts(struct mei_device *dev); | |
486 | void mei_disable_interrupts(struct mei_device *dev); | |
487 | ||
ab841160 | 488 | #endif |