2 * Copyright 2019 Advanced Micro Devices, Inc.
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30 * DOC: DMUB interface and operation
32 * DMUB is the interface to the display DMCUB microcontroller on DCN hardware.
33 * It delegates hardware initialization and command submission to the
34 * microcontroller. DMUB is the shortname for DMCUB.
36 * This interface is not thread-safe. Ensure that all access to the interface
37 * is properly synchronized by the caller.
39 * Initialization and usage of the DMUB service should be done in the
42 * 1. dmub_srv_create()
43 * 2. dmub_srv_has_hw_support()
44 * 3. dmub_srv_calc_region_info()
45 * 4. dmub_srv_hw_init()
47 * The call to dmub_srv_create() is required to use the server.
49 * The calls to dmub_srv_has_hw_support() and dmub_srv_calc_region_info()
50 * are helpers to query cache window size and allocate framebuffer(s)
51 * for the cache windows.
53 * The call to dmub_srv_hw_init() programs the DMCUB registers to prepare
54 * for command submission. Commands can be queued via dmub_srv_cmd_queue()
55 * and executed via dmub_srv_cmd_execute().
57 * If the queue is full the dmub_srv_wait_for_idle() call can be used to
58 * wait until the queue has been cleared.
60 * Destroying the DMUB service can be done by calling dmub_srv_destroy().
61 * This does not clear DMUB hardware state, only software state.
63 * The interface is intended to be standalone and should not depend on any
64 * other component within DAL.
67 #include "inc/dmub_cmd.h"
69 #if defined(__cplusplus)
73 /* Forward declarations */
75 struct dmub_srv_common_regs;
76 struct dmub_srv_dcn31_regs;
78 struct dmcub_trace_buf_entry;
80 /* enum dmub_status - return code for dmcub functions */
84 DMUB_STATUS_QUEUE_FULL,
89 /* enum dmub_asic - dmub asic identifier */
102 /* enum dmub_window_id - dmub window identifier */
103 enum dmub_window_id {
104 DMUB_WINDOW_0_INST_CONST = 0,
106 DMUB_WINDOW_2_BSS_DATA,
108 DMUB_WINDOW_4_MAILBOX,
109 DMUB_WINDOW_5_TRACEBUFF,
110 DMUB_WINDOW_6_FW_STATE,
111 DMUB_WINDOW_7_SCRATCH_MEM,
115 /* enum dmub_notification_type - dmub outbox notification identifier */
116 enum dmub_notification_type {
117 DMUB_NOTIFICATION_NO_DATA = 0,
118 DMUB_NOTIFICATION_AUX_REPLY,
119 DMUB_NOTIFICATION_HPD,
120 DMUB_NOTIFICATION_HPD_IRQ,
121 DMUB_NOTIFICATION_MAX
125 * struct dmub_region - dmub hw memory region
126 * @base: base address for region, must be 256 byte aligned
127 * @top: top address for region
135 * struct dmub_window - dmub hw cache window
136 * @off: offset to the fb memory in gpu address space
137 * @r: region in uc address space for cache window
140 union dmub_addr offset;
141 struct dmub_region region;
145 * struct dmub_fb - defines a dmub framebuffer memory region
146 * @cpu_addr: cpu virtual address for the region, NULL if invalid
147 * @gpu_addr: gpu virtual address for the region, NULL if invalid
148 * @size: size of the region in bytes, zero if invalid
157 * struct dmub_srv_region_params - params used for calculating dmub regions
158 * @inst_const_size: size of the fw inst const section
159 * @bss_data_size: size of the fw bss data section
160 * @vbios_size: size of the vbios data
161 * @fw_bss_data: raw firmware bss data section
163 struct dmub_srv_region_params {
164 uint32_t inst_const_size;
165 uint32_t bss_data_size;
167 const uint8_t *fw_inst_const;
168 const uint8_t *fw_bss_data;
172 * struct dmub_srv_region_info - output region info from the dmub service
173 * @fb_size: required minimum fb size for all regions, aligned to 4096 bytes
174 * @num_regions: number of regions used by the dmub service
175 * @regions: region info
177 * The regions are aligned such that they can be all placed within the
178 * same framebuffer but they can also be placed into different framebuffers.
180 * The size of each region can be calculated by the caller:
181 * size = reg.top - reg.base
183 * Care must be taken when performing custom allocations to ensure that each
184 * region base address is 256 byte aligned.
186 struct dmub_srv_region_info {
189 struct dmub_region regions[DMUB_WINDOW_TOTAL];
193 * struct dmub_srv_fb_params - parameters used for driver fb setup
194 * @region_info: region info calculated by dmub service
195 * @cpu_addr: base cpu address for the framebuffer
196 * @gpu_addr: base gpu virtual address for the framebuffer
198 struct dmub_srv_fb_params {
199 const struct dmub_srv_region_info *region_info;
205 * struct dmub_srv_fb_info - output fb info from the dmub service
206 * @num_fbs: number of required dmub framebuffers
207 * @fbs: fb data for each region
209 * Output from the dmub service helper that can be used by the
210 * driver to prepare dmub_fb that can be passed into the dmub
213 * Assumes that all regions are within the same framebuffer
214 * and have been setup according to the region_info generated
215 * by the dmub service.
217 struct dmub_srv_fb_info {
219 struct dmub_fb fb[DMUB_WINDOW_TOTAL];
223 * struct dmub_srv_hw_params - params for dmub hardware initialization
224 * @fb: framebuffer info for each region
225 * @fb_base: base of the framebuffer aperture
226 * @fb_offset: offset of the framebuffer aperture
227 * @psp_version: psp version to pass for DMCU init
228 * @load_inst_const: true if DMUB should load inst const fw
230 struct dmub_srv_hw_params {
231 struct dmub_fb *fb[DMUB_WINDOW_TOTAL];
234 uint32_t psp_version;
235 bool load_inst_const;
236 bool skip_panel_power_sequence;
241 * struct dmub_diagnostic_data - Diagnostic data retrieved from DMCUB for
242 * debugging purposes, including logging, crash analysis, etc.
244 struct dmub_diagnostic_data {
245 uint32_t dmcub_version;
246 uint32_t scratch[16];
248 uint32_t undefined_address_fault_addr;
249 uint32_t inst_fetch_fault_addr;
250 uint32_t data_write_fault_addr;
251 uint32_t inbox1_rptr;
252 uint32_t inbox1_wptr;
253 uint32_t inbox1_size;
254 uint32_t inbox0_rptr;
255 uint32_t inbox0_wptr;
256 uint32_t inbox0_size;
257 uint8_t is_dmcub_enabled : 1;
258 uint8_t is_dmcub_soft_reset : 1;
259 uint8_t is_dmcub_secure_reset : 1;
260 uint8_t is_traceport_en : 1;
261 uint8_t is_cw0_enabled : 1;
262 uint8_t is_cw6_enabled : 1;
266 * struct dmub_srv_base_funcs - Driver specific base callbacks
268 struct dmub_srv_base_funcs {
272 * Hook for reading a register.
274 * Return: The 32-bit register value from the given address.
276 uint32_t (*reg_read)(void *ctx, uint32_t address);
281 * Hook for writing a value to the register specified by address.
283 void (*reg_write)(void *ctx, uint32_t address, uint32_t value);
287 * struct dmub_srv_hw_funcs - hardware sequencer funcs for dmub
289 struct dmub_srv_hw_funcs {
290 /* private: internal use only */
292 void (*init)(struct dmub_srv *dmub);
294 void (*reset)(struct dmub_srv *dmub);
296 void (*reset_release)(struct dmub_srv *dmub);
298 void (*backdoor_load)(struct dmub_srv *dmub,
299 const struct dmub_window *cw0,
300 const struct dmub_window *cw1);
302 void (*setup_windows)(struct dmub_srv *dmub,
303 const struct dmub_window *cw2,
304 const struct dmub_window *cw3,
305 const struct dmub_window *cw4,
306 const struct dmub_window *cw5,
307 const struct dmub_window *cw6);
309 void (*setup_mailbox)(struct dmub_srv *dmub,
310 const struct dmub_region *inbox1);
312 uint32_t (*get_inbox1_rptr)(struct dmub_srv *dmub);
314 void (*set_inbox1_wptr)(struct dmub_srv *dmub, uint32_t wptr_offset);
316 void (*setup_out_mailbox)(struct dmub_srv *dmub,
317 const struct dmub_region *outbox1);
319 uint32_t (*get_outbox1_wptr)(struct dmub_srv *dmub);
321 void (*set_outbox1_rptr)(struct dmub_srv *dmub, uint32_t rptr_offset);
323 void (*setup_outbox0)(struct dmub_srv *dmub,
324 const struct dmub_region *outbox0);
326 uint32_t (*get_outbox0_wptr)(struct dmub_srv *dmub);
328 void (*set_outbox0_rptr)(struct dmub_srv *dmub, uint32_t rptr_offset);
330 uint32_t (*emul_get_inbox1_rptr)(struct dmub_srv *dmub);
332 void (*emul_set_inbox1_wptr)(struct dmub_srv *dmub, uint32_t wptr_offset);
334 bool (*is_supported)(struct dmub_srv *dmub);
336 bool (*is_hw_init)(struct dmub_srv *dmub);
338 bool (*is_phy_init)(struct dmub_srv *dmub);
339 void (*enable_dmub_boot_options)(struct dmub_srv *dmub,
340 const struct dmub_srv_hw_params *params);
342 void (*skip_dmub_panel_power_sequence)(struct dmub_srv *dmub, bool skip);
344 union dmub_fw_boot_status (*get_fw_status)(struct dmub_srv *dmub);
347 void (*set_gpint)(struct dmub_srv *dmub,
348 union dmub_gpint_data_register reg);
350 bool (*is_gpint_acked)(struct dmub_srv *dmub,
351 union dmub_gpint_data_register reg);
353 uint32_t (*get_gpint_response)(struct dmub_srv *dmub);
355 uint32_t (*get_gpint_dataout)(struct dmub_srv *dmub);
357 void (*send_inbox0_cmd)(struct dmub_srv *dmub, union dmub_inbox0_data_register data);
358 uint32_t (*get_current_time)(struct dmub_srv *dmub);
360 void (*get_diagnostic_data)(struct dmub_srv *dmub, struct dmub_diagnostic_data *dmub_oca);
362 bool (*should_detect)(struct dmub_srv *dmub);
366 * struct dmub_srv_create_params - params for dmub service creation
367 * @base_funcs: driver supplied base routines
368 * @hw_funcs: optional overrides for hw funcs
369 * @user_ctx: context data for callback funcs
370 * @asic: driver supplied asic
371 * @fw_version: the current firmware version, if any
372 * @is_virtual: false for hw support only
374 struct dmub_srv_create_params {
375 struct dmub_srv_base_funcs funcs;
376 struct dmub_srv_hw_funcs *hw_funcs;
384 * struct dmub_srv - software state for dmcub
385 * @asic: dmub asic identifier
386 * @user_ctx: user provided context for the dmub_srv
387 * @fw_version: the current firmware version, if any
388 * @is_virtual: false if hardware support only
389 * @fw_state: dmub firmware state pointer
396 struct dmub_fb scratch_mem_fb;
397 volatile const struct dmub_fw_state *fw_state;
399 /* private: internal use only */
400 const struct dmub_srv_common_regs *regs;
401 const struct dmub_srv_dcn31_regs *regs_dcn31;
403 struct dmub_srv_base_funcs funcs;
404 struct dmub_srv_hw_funcs hw_funcs;
405 struct dmub_rb inbox1_rb;
407 * outbox1_rb is accessed without locks (dal & dc)
408 * and to be used only in dmub_srv_stat_get_notification()
410 struct dmub_rb outbox1_rb;
412 struct dmub_rb outbox0_rb;
419 uint32_t psp_version;
421 /* Feature capabilities reported by fw */
422 struct dmub_feature_caps feature_caps;
426 * struct dmub_notification - dmub notification data
427 * @type: dmub notification type
428 * @link_index: link index to identify aux connection
429 * @result: USB4 status returned from dmub
430 * @pending_notification: Indicates there are other pending notifications
431 * @aux_reply: aux reply
432 * @hpd_status: hpd status
434 struct dmub_notification {
435 enum dmub_notification_type type;
438 bool pending_notification;
440 struct aux_reply_data aux_reply;
441 enum dp_hpd_status hpd_status;
446 * DMUB firmware version helper macro - useful for checking if the version
447 * of a firmware to know if feature or functionality is supported or present.
449 #define DMUB_FW_VERSION(major, minor, revision) \
450 ((((major) & 0xFF) << 24) | (((minor) & 0xFF) << 16) | ((revision) & 0xFFFF))
453 * dmub_srv_create() - creates the DMUB service.
454 * @dmub: the dmub service
455 * @params: creation parameters for the service
458 * DMUB_STATUS_OK - success
459 * DMUB_STATUS_INVALID - unspecified error
461 enum dmub_status dmub_srv_create(struct dmub_srv *dmub,
462 const struct dmub_srv_create_params *params);
465 * dmub_srv_destroy() - destroys the DMUB service.
466 * @dmub: the dmub service
468 void dmub_srv_destroy(struct dmub_srv *dmub);
471 * dmub_srv_calc_region_info() - retreives region info from the dmub service
472 * @dmub: the dmub service
473 * @params: parameters used to calculate region locations
474 * @info_out: the output region info from dmub
476 * Calculates the base and top address for all relevant dmub regions
477 * using the parameters given (if any).
480 * DMUB_STATUS_OK - success
481 * DMUB_STATUS_INVALID - unspecified error
484 dmub_srv_calc_region_info(struct dmub_srv *dmub,
485 const struct dmub_srv_region_params *params,
486 struct dmub_srv_region_info *out);
489 * dmub_srv_calc_region_info() - retreives fb info from the dmub service
490 * @dmub: the dmub service
491 * @params: parameters used to calculate fb locations
492 * @info_out: the output fb info from dmub
494 * Calculates the base and top address for all relevant dmub regions
495 * using the parameters given (if any).
498 * DMUB_STATUS_OK - success
499 * DMUB_STATUS_INVALID - unspecified error
501 enum dmub_status dmub_srv_calc_fb_info(struct dmub_srv *dmub,
502 const struct dmub_srv_fb_params *params,
503 struct dmub_srv_fb_info *out);
506 * dmub_srv_has_hw_support() - returns hw support state for dmcub
507 * @dmub: the dmub service
508 * @is_supported: hw support state
510 * Queries the hardware for DMCUB support and returns the result.
512 * Can be called before dmub_srv_hw_init().
515 * DMUB_STATUS_OK - success
516 * DMUB_STATUS_INVALID - unspecified error
518 enum dmub_status dmub_srv_has_hw_support(struct dmub_srv *dmub,
522 * dmub_srv_is_hw_init() - returns hardware init state
525 * DMUB_STATUS_OK - success
526 * DMUB_STATUS_INVALID - unspecified error
528 enum dmub_status dmub_srv_is_hw_init(struct dmub_srv *dmub, bool *is_hw_init);
531 * dmub_srv_hw_init() - initializes the underlying DMUB hardware
532 * @dmub: the dmub service
533 * @params: params for hardware initialization
535 * Resets the DMUB hardware and performs backdoor loading of the
536 * required cache regions based on the input framebuffer regions.
539 * DMUB_STATUS_OK - success
540 * DMUB_STATUS_NO_CTX - dmcub context not initialized
541 * DMUB_STATUS_INVALID - unspecified error
543 enum dmub_status dmub_srv_hw_init(struct dmub_srv *dmub,
544 const struct dmub_srv_hw_params *params);
547 * dmub_srv_hw_reset() - puts the DMUB hardware in reset state if initialized
548 * @dmub: the dmub service
550 * Before destroying the DMUB service or releasing the backing framebuffer
551 * memory we'll need to put the DMCUB into reset first.
553 * A subsequent call to dmub_srv_hw_init() will re-enable the DMCUB.
556 * DMUB_STATUS_OK - success
557 * DMUB_STATUS_INVALID - unspecified error
559 enum dmub_status dmub_srv_hw_reset(struct dmub_srv *dmub);
562 * dmub_srv_cmd_queue() - queues a command to the DMUB
563 * @dmub: the dmub service
564 * @cmd: the command to queue
566 * Queues a command to the DMUB service but does not begin execution
570 * DMUB_STATUS_OK - success
571 * DMUB_STATUS_QUEUE_FULL - no remaining room in queue
572 * DMUB_STATUS_INVALID - unspecified error
574 enum dmub_status dmub_srv_cmd_queue(struct dmub_srv *dmub,
575 const union dmub_rb_cmd *cmd);
578 * dmub_srv_cmd_execute() - Executes a queued sequence to the dmub
579 * @dmub: the dmub service
581 * Begins execution of queued commands on the dmub.
584 * DMUB_STATUS_OK - success
585 * DMUB_STATUS_INVALID - unspecified error
587 enum dmub_status dmub_srv_cmd_execute(struct dmub_srv *dmub);
590 * dmub_srv_wait_for_auto_load() - Waits for firmware auto load to complete
591 * @dmub: the dmub service
592 * @timeout_us: the maximum number of microseconds to wait
594 * Waits until firmware has been autoloaded by the DMCUB. The maximum
595 * wait time is given in microseconds to prevent spinning forever.
597 * On ASICs without firmware autoload support this function will return
601 * DMUB_STATUS_OK - success
602 * DMUB_STATUS_TIMEOUT - wait for phy init timed out
603 * DMUB_STATUS_INVALID - unspecified error
605 enum dmub_status dmub_srv_wait_for_auto_load(struct dmub_srv *dmub,
606 uint32_t timeout_us);
609 * dmub_srv_wait_for_phy_init() - Waits for DMUB PHY init to complete
610 * @dmub: the dmub service
611 * @timeout_us: the maximum number of microseconds to wait
613 * Waits until the PHY has been initialized by the DMUB. The maximum
614 * wait time is given in microseconds to prevent spinning forever.
616 * On ASICs without PHY init support this function will return
620 * DMUB_STATUS_OK - success
621 * DMUB_STATUS_TIMEOUT - wait for phy init timed out
622 * DMUB_STATUS_INVALID - unspecified error
624 enum dmub_status dmub_srv_wait_for_phy_init(struct dmub_srv *dmub,
625 uint32_t timeout_us);
628 * dmub_srv_wait_for_idle() - Waits for the DMUB to be idle
629 * @dmub: the dmub service
630 * @timeout_us: the maximum number of microseconds to wait
632 * Waits until the DMUB buffer is empty and all commands have
633 * finished processing. The maximum wait time is given in
634 * microseconds to prevent spinning forever.
637 * DMUB_STATUS_OK - success
638 * DMUB_STATUS_TIMEOUT - wait for buffer to flush timed out
639 * DMUB_STATUS_INVALID - unspecified error
641 enum dmub_status dmub_srv_wait_for_idle(struct dmub_srv *dmub,
642 uint32_t timeout_us);
645 * dmub_srv_send_gpint_command() - Sends a GPINT based command.
646 * @dmub: the dmub service
647 * @command_code: the command code to send
648 * @param: the command parameter to send
649 * @timeout_us: the maximum number of microseconds to wait
651 * Sends a command via the general purpose interrupt (GPINT).
652 * Waits for the number of microseconds specified by timeout_us
653 * for the command ACK before returning.
655 * Can be called after software initialization.
658 * DMUB_STATUS_OK - success
659 * DMUB_STATUS_TIMEOUT - wait for ACK timed out
660 * DMUB_STATUS_INVALID - unspecified error
663 dmub_srv_send_gpint_command(struct dmub_srv *dmub,
664 enum dmub_gpint_command command_code,
665 uint16_t param, uint32_t timeout_us);
668 * dmub_srv_get_gpint_response() - Queries the GPINT response.
669 * @dmub: the dmub service
670 * @response: the response for the last GPINT
672 * Returns the response code for the last GPINT interrupt.
674 * Can be called after software initialization.
677 * DMUB_STATUS_OK - success
678 * DMUB_STATUS_INVALID - unspecified error
680 enum dmub_status dmub_srv_get_gpint_response(struct dmub_srv *dmub,
684 * dmub_srv_get_gpint_dataout() - Queries the GPINT DATAOUT.
685 * @dmub: the dmub service
686 * @dataout: the data for the GPINT DATAOUT
688 * Returns the response code for the last GPINT DATAOUT interrupt.
690 * Can be called after software initialization.
693 * DMUB_STATUS_OK - success
694 * DMUB_STATUS_INVALID - unspecified error
696 enum dmub_status dmub_srv_get_gpint_dataout(struct dmub_srv *dmub,
700 * dmub_flush_buffer_mem() - Read back entire frame buffer region.
701 * This ensures that the write from x86 has been flushed and will not
703 * @fb: frame buffer to flush
705 * Can be called after software initialization.
707 void dmub_flush_buffer_mem(const struct dmub_fb *fb);
710 * dmub_srv_get_fw_boot_status() - Returns the DMUB boot status bits.
712 * @dmub: the dmub service
713 * @status: out pointer for firmware status
716 * DMUB_STATUS_OK - success
717 * DMUB_STATUS_INVALID - unspecified error, unsupported
719 enum dmub_status dmub_srv_get_fw_boot_status(struct dmub_srv *dmub,
720 union dmub_fw_boot_status *status);
722 enum dmub_status dmub_srv_cmd_with_reply_data(struct dmub_srv *dmub,
723 union dmub_rb_cmd *cmd);
725 bool dmub_srv_get_outbox0_msg(struct dmub_srv *dmub, struct dmcub_trace_buf_entry *entry);
727 bool dmub_srv_get_diagnostic_data(struct dmub_srv *dmub, struct dmub_diagnostic_data *diag_data);
729 bool dmub_srv_should_detect(struct dmub_srv *dmub);
731 #if defined(__cplusplus)
735 #endif /* _DMUB_SRV_H_ */