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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;
77 /* enum dmub_status - return code for dmcub functions */
81 DMUB_STATUS_QUEUE_FULL,
86 /* enum dmub_asic - dmub asic identifier */
91 #ifdef CONFIG_DRM_AMD_DC_DCN3_0
97 /* enum dmub_window_id - dmub window identifier */
99 DMUB_WINDOW_0_INST_CONST = 0,
101 DMUB_WINDOW_2_BSS_DATA,
103 DMUB_WINDOW_4_MAILBOX,
104 DMUB_WINDOW_5_TRACEBUFF,
105 DMUB_WINDOW_6_FW_STATE,
106 DMUB_WINDOW_7_SCRATCH_MEM,
111 * struct dmub_region - dmub hw memory region
112 * @base: base address for region, must be 256 byte aligned
113 * @top: top address for region
121 * struct dmub_window - dmub hw cache window
122 * @off: offset to the fb memory in gpu address space
123 * @r: region in uc address space for cache window
126 union dmub_addr offset;
127 struct dmub_region region;
131 * struct dmub_fb - defines a dmub framebuffer memory region
132 * @cpu_addr: cpu virtual address for the region, NULL if invalid
133 * @gpu_addr: gpu virtual address for the region, NULL if invalid
134 * @size: size of the region in bytes, zero if invalid
143 * struct dmub_srv_region_params - params used for calculating dmub regions
144 * @inst_const_size: size of the fw inst const section
145 * @bss_data_size: size of the fw bss data section
146 * @vbios_size: size of the vbios data
147 * @fw_bss_data: raw firmware bss data section
149 struct dmub_srv_region_params {
150 uint32_t inst_const_size;
151 uint32_t bss_data_size;
153 const uint8_t *fw_inst_const;
154 const uint8_t *fw_bss_data;
158 * struct dmub_srv_region_info - output region info from the dmub service
159 * @fb_size: required minimum fb size for all regions, aligned to 4096 bytes
160 * @num_regions: number of regions used by the dmub service
161 * @regions: region info
163 * The regions are aligned such that they can be all placed within the
164 * same framebuffer but they can also be placed into different framebuffers.
166 * The size of each region can be calculated by the caller:
167 * size = reg.top - reg.base
169 * Care must be taken when performing custom allocations to ensure that each
170 * region base address is 256 byte aligned.
172 struct dmub_srv_region_info {
175 struct dmub_region regions[DMUB_WINDOW_TOTAL];
179 * struct dmub_srv_fb_params - parameters used for driver fb setup
180 * @region_info: region info calculated by dmub service
181 * @cpu_addr: base cpu address for the framebuffer
182 * @gpu_addr: base gpu virtual address for the framebuffer
184 struct dmub_srv_fb_params {
185 const struct dmub_srv_region_info *region_info;
191 * struct dmub_srv_fb_info - output fb info from the dmub service
192 * @num_fbs: number of required dmub framebuffers
193 * @fbs: fb data for each region
195 * Output from the dmub service helper that can be used by the
196 * driver to prepare dmub_fb that can be passed into the dmub
199 * Assumes that all regions are within the same framebuffer
200 * and have been setup according to the region_info generated
201 * by the dmub service.
203 struct dmub_srv_fb_info {
205 struct dmub_fb fb[DMUB_WINDOW_TOTAL];
209 * struct dmub_srv_base_funcs - Driver specific base callbacks
211 struct dmub_srv_base_funcs {
215 * Hook for reading a register.
217 * Return: The 32-bit register value from the given address.
219 uint32_t (*reg_read)(void *ctx, uint32_t address);
224 * Hook for writing a value to the register specified by address.
226 void (*reg_write)(void *ctx, uint32_t address, uint32_t value);
230 * struct dmub_srv_hw_funcs - hardware sequencer funcs for dmub
232 struct dmub_srv_hw_funcs {
233 /* private: internal use only */
235 void (*init)(struct dmub_srv *dmub);
237 void (*reset)(struct dmub_srv *dmub);
239 void (*reset_release)(struct dmub_srv *dmub);
241 void (*backdoor_load)(struct dmub_srv *dmub,
242 const struct dmub_window *cw0,
243 const struct dmub_window *cw1);
245 void (*setup_windows)(struct dmub_srv *dmub,
246 const struct dmub_window *cw2,
247 const struct dmub_window *cw3,
248 const struct dmub_window *cw4,
249 const struct dmub_window *cw5,
250 const struct dmub_window *cw6);
252 void (*setup_mailbox)(struct dmub_srv *dmub,
253 const struct dmub_region *inbox1);
255 uint32_t (*get_inbox1_rptr)(struct dmub_srv *dmub);
257 void (*set_inbox1_wptr)(struct dmub_srv *dmub, uint32_t wptr_offset);
259 uint32_t (*emul_get_inbox1_rptr)(struct dmub_srv *dmub);
261 void (*emul_set_inbox1_wptr)(struct dmub_srv *dmub, uint32_t wptr_offset);
263 bool (*is_supported)(struct dmub_srv *dmub);
265 bool (*is_hw_init)(struct dmub_srv *dmub);
267 bool (*is_phy_init)(struct dmub_srv *dmub);
269 bool (*is_auto_load_done)(struct dmub_srv *dmub);
271 void (*set_gpint)(struct dmub_srv *dmub,
272 union dmub_gpint_data_register reg);
274 bool (*is_gpint_acked)(struct dmub_srv *dmub,
275 union dmub_gpint_data_register reg);
277 uint32_t (*get_gpint_response)(struct dmub_srv *dmub);
281 * struct dmub_srv_create_params - params for dmub service creation
282 * @base_funcs: driver supplied base routines
283 * @hw_funcs: optional overrides for hw funcs
284 * @user_ctx: context data for callback funcs
285 * @asic: driver supplied asic
286 * @fw_version: the current firmware version, if any
287 * @is_virtual: false for hw support only
289 struct dmub_srv_create_params {
290 struct dmub_srv_base_funcs funcs;
291 struct dmub_srv_hw_funcs *hw_funcs;
299 * struct dmub_srv_hw_params - params for dmub hardware initialization
300 * @fb: framebuffer info for each region
301 * @fb_base: base of the framebuffer aperture
302 * @fb_offset: offset of the framebuffer aperture
303 * @psp_version: psp version to pass for DMCU init
304 * @load_inst_const: true if DMUB should load inst const fw
306 struct dmub_srv_hw_params {
307 struct dmub_fb *fb[DMUB_WINDOW_TOTAL];
310 uint32_t psp_version;
311 bool load_inst_const;
315 * struct dmub_srv - software state for dmcub
316 * @asic: dmub asic identifier
317 * @user_ctx: user provided context for the dmub_srv
318 * @fw_version: the current firmware version, if any
319 * @is_virtual: false if hardware support only
320 * @fw_state: dmub firmware state pointer
327 struct dmub_fb scratch_mem_fb;
328 volatile const struct dmub_fw_state *fw_state;
330 /* private: internal use only */
331 const struct dmub_srv_common_regs *regs;
333 struct dmub_srv_base_funcs funcs;
334 struct dmub_srv_hw_funcs hw_funcs;
335 struct dmub_rb inbox1_rb;
342 uint32_t psp_version;
346 * DMUB firmware version helper macro - useful for checking if the version
347 * of a firmware to know if feature or functionality is supported or present.
349 #define DMUB_FW_VERSION(major, minor, revision) \
350 ((((major) & 0xFF) << 24) | (((minor) & 0xFF) << 16) | ((revision) & 0xFFFF))
353 * dmub_srv_create() - creates the DMUB service.
354 * @dmub: the dmub service
355 * @params: creation parameters for the service
358 * DMUB_STATUS_OK - success
359 * DMUB_STATUS_INVALID - unspecified error
361 enum dmub_status dmub_srv_create(struct dmub_srv *dmub,
362 const struct dmub_srv_create_params *params);
365 * dmub_srv_destroy() - destroys the DMUB service.
366 * @dmub: the dmub service
368 void dmub_srv_destroy(struct dmub_srv *dmub);
371 * dmub_srv_calc_region_info() - retreives region info from the dmub service
372 * @dmub: the dmub service
373 * @params: parameters used to calculate region locations
374 * @info_out: the output region info from dmub
376 * Calculates the base and top address for all relevant dmub regions
377 * using the parameters given (if any).
380 * DMUB_STATUS_OK - success
381 * DMUB_STATUS_INVALID - unspecified error
384 dmub_srv_calc_region_info(struct dmub_srv *dmub,
385 const struct dmub_srv_region_params *params,
386 struct dmub_srv_region_info *out);
389 * dmub_srv_calc_region_info() - retreives fb info from the dmub service
390 * @dmub: the dmub service
391 * @params: parameters used to calculate fb locations
392 * @info_out: the output fb info from dmub
394 * Calculates the base and top address for all relevant dmub regions
395 * using the parameters given (if any).
398 * DMUB_STATUS_OK - success
399 * DMUB_STATUS_INVALID - unspecified error
401 enum dmub_status dmub_srv_calc_fb_info(struct dmub_srv *dmub,
402 const struct dmub_srv_fb_params *params,
403 struct dmub_srv_fb_info *out);
406 * dmub_srv_has_hw_support() - returns hw support state for dmcub
407 * @dmub: the dmub service
408 * @is_supported: hw support state
410 * Queries the hardware for DMCUB support and returns the result.
412 * Can be called before dmub_srv_hw_init().
415 * DMUB_STATUS_OK - success
416 * DMUB_STATUS_INVALID - unspecified error
418 enum dmub_status dmub_srv_has_hw_support(struct dmub_srv *dmub,
422 * dmub_srv_is_hw_init() - returns hardware init state
425 * DMUB_STATUS_OK - success
426 * DMUB_STATUS_INVALID - unspecified error
428 enum dmub_status dmub_srv_is_hw_init(struct dmub_srv *dmub, bool *is_hw_init);
431 * dmub_srv_hw_init() - initializes the underlying DMUB hardware
432 * @dmub: the dmub service
433 * @params: params for hardware initialization
435 * Resets the DMUB hardware and performs backdoor loading of the
436 * required cache regions based on the input framebuffer regions.
439 * DMUB_STATUS_OK - success
440 * DMUB_STATUS_NO_CTX - dmcub context not initialized
441 * DMUB_STATUS_INVALID - unspecified error
443 enum dmub_status dmub_srv_hw_init(struct dmub_srv *dmub,
444 const struct dmub_srv_hw_params *params);
447 * dmub_srv_hw_reset() - puts the DMUB hardware in reset state if initialized
448 * @dmub: the dmub service
450 * Before destroying the DMUB service or releasing the backing framebuffer
451 * memory we'll need to put the DMCUB into reset first.
453 * A subsequent call to dmub_srv_hw_init() will re-enable the DMCUB.
456 * DMUB_STATUS_OK - success
457 * DMUB_STATUS_INVALID - unspecified error
459 enum dmub_status dmub_srv_hw_reset(struct dmub_srv *dmub);
462 * dmub_srv_cmd_queue() - queues a command to the DMUB
463 * @dmub: the dmub service
464 * @cmd: the command to queue
466 * Queues a command to the DMUB service but does not begin execution
470 * DMUB_STATUS_OK - success
471 * DMUB_STATUS_QUEUE_FULL - no remaining room in queue
472 * DMUB_STATUS_INVALID - unspecified error
474 enum dmub_status dmub_srv_cmd_queue(struct dmub_srv *dmub,
475 const union dmub_rb_cmd *cmd);
478 * dmub_srv_cmd_execute() - Executes a queued sequence to the dmub
479 * @dmub: the dmub service
481 * Begins execution of queued commands on the dmub.
484 * DMUB_STATUS_OK - success
485 * DMUB_STATUS_INVALID - unspecified error
487 enum dmub_status dmub_srv_cmd_execute(struct dmub_srv *dmub);
490 * dmub_srv_wait_for_auto_load() - Waits for firmware auto load to complete
491 * @dmub: the dmub service
492 * @timeout_us: the maximum number of microseconds to wait
494 * Waits until firmware has been autoloaded by the DMCUB. The maximum
495 * wait time is given in microseconds to prevent spinning forever.
497 * On ASICs without firmware autoload support this function will return
501 * DMUB_STATUS_OK - success
502 * DMUB_STATUS_TIMEOUT - wait for phy init timed out
503 * DMUB_STATUS_INVALID - unspecified error
505 enum dmub_status dmub_srv_wait_for_auto_load(struct dmub_srv *dmub,
506 uint32_t timeout_us);
509 * dmub_srv_wait_for_phy_init() - Waits for DMUB PHY init to complete
510 * @dmub: the dmub service
511 * @timeout_us: the maximum number of microseconds to wait
513 * Waits until the PHY has been initialized by the DMUB. The maximum
514 * wait time is given in microseconds to prevent spinning forever.
516 * On ASICs without PHY init support this function will return
520 * DMUB_STATUS_OK - success
521 * DMUB_STATUS_TIMEOUT - wait for phy init timed out
522 * DMUB_STATUS_INVALID - unspecified error
524 enum dmub_status dmub_srv_wait_for_phy_init(struct dmub_srv *dmub,
525 uint32_t timeout_us);
528 * dmub_srv_wait_for_idle() - Waits for the DMUB to be idle
529 * @dmub: the dmub service
530 * @timeout_us: the maximum number of microseconds to wait
532 * Waits until the DMUB buffer is empty and all commands have
533 * finished processing. The maximum wait time is given in
534 * microseconds to prevent spinning forever.
537 * DMUB_STATUS_OK - success
538 * DMUB_STATUS_TIMEOUT - wait for buffer to flush timed out
539 * DMUB_STATUS_INVALID - unspecified error
541 enum dmub_status dmub_srv_wait_for_idle(struct dmub_srv *dmub,
542 uint32_t timeout_us);
545 * dmub_srv_send_gpint_command() - Sends a GPINT based command.
546 * @dmub: the dmub service
547 * @command_code: the command code to send
548 * @param: the command parameter to send
549 * @timeout_us: the maximum number of microseconds to wait
551 * Sends a command via the general purpose interrupt (GPINT).
552 * Waits for the number of microseconds specified by timeout_us
553 * for the command ACK before returning.
555 * Can be called after software initialization.
558 * DMUB_STATUS_OK - success
559 * DMUB_STATUS_TIMEOUT - wait for ACK timed out
560 * DMUB_STATUS_INVALID - unspecified error
563 dmub_srv_send_gpint_command(struct dmub_srv *dmub,
564 enum dmub_gpint_command command_code,
565 uint16_t param, uint32_t timeout_us);
568 * dmub_srv_get_gpint_response() - Queries the GPINT response.
569 * @dmub: the dmub service
570 * @response: the response for the last GPINT
572 * Returns the response code for the last GPINT interrupt.
574 * Can be called after software initialization.
577 * DMUB_STATUS_OK - success
578 * DMUB_STATUS_INVALID - unspecified error
580 enum dmub_status dmub_srv_get_gpint_response(struct dmub_srv *dmub,
584 * dmub_flush_buffer_mem() - Read back entire frame buffer region.
585 * This ensures that the write from x86 has been flushed and will not
587 * @fb: frame buffer to flush
589 * Can be called after software initialization.
591 void dmub_flush_buffer_mem(const struct dmub_fb *fb);
593 #if defined(__cplusplus)
597 #endif /* _DMUB_SRV_H_ */