2 * Copyright 2019 Advanced Micro Devices, Inc.
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
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 void (*enable_dmub_boot_options)(struct dmub_srv *dmub);
269 union dmub_fw_boot_status (*get_fw_status)(struct dmub_srv *dmub);
272 void (*set_gpint)(struct dmub_srv *dmub,
273 union dmub_gpint_data_register reg);
275 bool (*is_gpint_acked)(struct dmub_srv *dmub,
276 union dmub_gpint_data_register reg);
278 uint32_t (*get_gpint_response)(struct dmub_srv *dmub);
282 * struct dmub_srv_create_params - params for dmub service creation
283 * @base_funcs: driver supplied base routines
284 * @hw_funcs: optional overrides for hw funcs
285 * @user_ctx: context data for callback funcs
286 * @asic: driver supplied asic
287 * @fw_version: the current firmware version, if any
288 * @is_virtual: false for hw support only
290 struct dmub_srv_create_params {
291 struct dmub_srv_base_funcs funcs;
292 struct dmub_srv_hw_funcs *hw_funcs;
300 * struct dmub_srv_hw_params - params for dmub hardware initialization
301 * @fb: framebuffer info for each region
302 * @fb_base: base of the framebuffer aperture
303 * @fb_offset: offset of the framebuffer aperture
304 * @psp_version: psp version to pass for DMCU init
305 * @load_inst_const: true if DMUB should load inst const fw
307 struct dmub_srv_hw_params {
308 struct dmub_fb *fb[DMUB_WINDOW_TOTAL];
311 uint32_t psp_version;
312 bool load_inst_const;
316 * struct dmub_srv - software state for dmcub
317 * @asic: dmub asic identifier
318 * @user_ctx: user provided context for the dmub_srv
319 * @fw_version: the current firmware version, if any
320 * @is_virtual: false if hardware support only
321 * @fw_state: dmub firmware state pointer
328 struct dmub_fb scratch_mem_fb;
329 volatile const struct dmub_fw_state *fw_state;
331 /* private: internal use only */
332 const struct dmub_srv_common_regs *regs;
334 struct dmub_srv_base_funcs funcs;
335 struct dmub_srv_hw_funcs hw_funcs;
336 struct dmub_rb inbox1_rb;
343 uint32_t psp_version;
347 * DMUB firmware version helper macro - useful for checking if the version
348 * of a firmware to know if feature or functionality is supported or present.
350 #define DMUB_FW_VERSION(major, minor, revision) \
351 ((((major) & 0xFF) << 24) | (((minor) & 0xFF) << 16) | ((revision) & 0xFFFF))
354 * dmub_srv_create() - creates the DMUB service.
355 * @dmub: the dmub service
356 * @params: creation parameters for the service
359 * DMUB_STATUS_OK - success
360 * DMUB_STATUS_INVALID - unspecified error
362 enum dmub_status dmub_srv_create(struct dmub_srv *dmub,
363 const struct dmub_srv_create_params *params);
366 * dmub_srv_destroy() - destroys the DMUB service.
367 * @dmub: the dmub service
369 void dmub_srv_destroy(struct dmub_srv *dmub);
372 * dmub_srv_calc_region_info() - retreives region info from the dmub service
373 * @dmub: the dmub service
374 * @params: parameters used to calculate region locations
375 * @info_out: the output region info from dmub
377 * Calculates the base and top address for all relevant dmub regions
378 * using the parameters given (if any).
381 * DMUB_STATUS_OK - success
382 * DMUB_STATUS_INVALID - unspecified error
385 dmub_srv_calc_region_info(struct dmub_srv *dmub,
386 const struct dmub_srv_region_params *params,
387 struct dmub_srv_region_info *out);
390 * dmub_srv_calc_region_info() - retreives fb info from the dmub service
391 * @dmub: the dmub service
392 * @params: parameters used to calculate fb locations
393 * @info_out: the output fb info from dmub
395 * Calculates the base and top address for all relevant dmub regions
396 * using the parameters given (if any).
399 * DMUB_STATUS_OK - success
400 * DMUB_STATUS_INVALID - unspecified error
402 enum dmub_status dmub_srv_calc_fb_info(struct dmub_srv *dmub,
403 const struct dmub_srv_fb_params *params,
404 struct dmub_srv_fb_info *out);
407 * dmub_srv_has_hw_support() - returns hw support state for dmcub
408 * @dmub: the dmub service
409 * @is_supported: hw support state
411 * Queries the hardware for DMCUB support and returns the result.
413 * Can be called before dmub_srv_hw_init().
416 * DMUB_STATUS_OK - success
417 * DMUB_STATUS_INVALID - unspecified error
419 enum dmub_status dmub_srv_has_hw_support(struct dmub_srv *dmub,
423 * dmub_srv_is_hw_init() - returns hardware init state
426 * DMUB_STATUS_OK - success
427 * DMUB_STATUS_INVALID - unspecified error
429 enum dmub_status dmub_srv_is_hw_init(struct dmub_srv *dmub, bool *is_hw_init);
432 * dmub_srv_hw_init() - initializes the underlying DMUB hardware
433 * @dmub: the dmub service
434 * @params: params for hardware initialization
436 * Resets the DMUB hardware and performs backdoor loading of the
437 * required cache regions based on the input framebuffer regions.
440 * DMUB_STATUS_OK - success
441 * DMUB_STATUS_NO_CTX - dmcub context not initialized
442 * DMUB_STATUS_INVALID - unspecified error
444 enum dmub_status dmub_srv_hw_init(struct dmub_srv *dmub,
445 const struct dmub_srv_hw_params *params);
448 * dmub_srv_hw_reset() - puts the DMUB hardware in reset state if initialized
449 * @dmub: the dmub service
451 * Before destroying the DMUB service or releasing the backing framebuffer
452 * memory we'll need to put the DMCUB into reset first.
454 * A subsequent call to dmub_srv_hw_init() will re-enable the DMCUB.
457 * DMUB_STATUS_OK - success
458 * DMUB_STATUS_INVALID - unspecified error
460 enum dmub_status dmub_srv_hw_reset(struct dmub_srv *dmub);
463 * dmub_srv_cmd_queue() - queues a command to the DMUB
464 * @dmub: the dmub service
465 * @cmd: the command to queue
467 * Queues a command to the DMUB service but does not begin execution
471 * DMUB_STATUS_OK - success
472 * DMUB_STATUS_QUEUE_FULL - no remaining room in queue
473 * DMUB_STATUS_INVALID - unspecified error
475 enum dmub_status dmub_srv_cmd_queue(struct dmub_srv *dmub,
476 const union dmub_rb_cmd *cmd);
479 * dmub_srv_cmd_execute() - Executes a queued sequence to the dmub
480 * @dmub: the dmub service
482 * Begins execution of queued commands on the dmub.
485 * DMUB_STATUS_OK - success
486 * DMUB_STATUS_INVALID - unspecified error
488 enum dmub_status dmub_srv_cmd_execute(struct dmub_srv *dmub);
491 * dmub_srv_wait_for_auto_load() - Waits for firmware auto load to complete
492 * @dmub: the dmub service
493 * @timeout_us: the maximum number of microseconds to wait
495 * Waits until firmware has been autoloaded by the DMCUB. The maximum
496 * wait time is given in microseconds to prevent spinning forever.
498 * On ASICs without firmware autoload support this function will return
502 * DMUB_STATUS_OK - success
503 * DMUB_STATUS_TIMEOUT - wait for phy init timed out
504 * DMUB_STATUS_INVALID - unspecified error
506 enum dmub_status dmub_srv_wait_for_auto_load(struct dmub_srv *dmub,
507 uint32_t timeout_us);
510 * dmub_srv_wait_for_phy_init() - Waits for DMUB PHY init to complete
511 * @dmub: the dmub service
512 * @timeout_us: the maximum number of microseconds to wait
514 * Waits until the PHY has been initialized by the DMUB. The maximum
515 * wait time is given in microseconds to prevent spinning forever.
517 * On ASICs without PHY init support this function will return
521 * DMUB_STATUS_OK - success
522 * DMUB_STATUS_TIMEOUT - wait for phy init timed out
523 * DMUB_STATUS_INVALID - unspecified error
525 enum dmub_status dmub_srv_wait_for_phy_init(struct dmub_srv *dmub,
526 uint32_t timeout_us);
529 * dmub_srv_wait_for_idle() - Waits for the DMUB to be idle
530 * @dmub: the dmub service
531 * @timeout_us: the maximum number of microseconds to wait
533 * Waits until the DMUB buffer is empty and all commands have
534 * finished processing. The maximum wait time is given in
535 * microseconds to prevent spinning forever.
538 * DMUB_STATUS_OK - success
539 * DMUB_STATUS_TIMEOUT - wait for buffer to flush timed out
540 * DMUB_STATUS_INVALID - unspecified error
542 enum dmub_status dmub_srv_wait_for_idle(struct dmub_srv *dmub,
543 uint32_t timeout_us);
546 * dmub_srv_send_gpint_command() - Sends a GPINT based command.
547 * @dmub: the dmub service
548 * @command_code: the command code to send
549 * @param: the command parameter to send
550 * @timeout_us: the maximum number of microseconds to wait
552 * Sends a command via the general purpose interrupt (GPINT).
553 * Waits for the number of microseconds specified by timeout_us
554 * for the command ACK before returning.
556 * Can be called after software initialization.
559 * DMUB_STATUS_OK - success
560 * DMUB_STATUS_TIMEOUT - wait for ACK timed out
561 * DMUB_STATUS_INVALID - unspecified error
564 dmub_srv_send_gpint_command(struct dmub_srv *dmub,
565 enum dmub_gpint_command command_code,
566 uint16_t param, uint32_t timeout_us);
569 * dmub_srv_get_gpint_response() - Queries the GPINT response.
570 * @dmub: the dmub service
571 * @response: the response for the last GPINT
573 * Returns the response code for the last GPINT interrupt.
575 * Can be called after software initialization.
578 * DMUB_STATUS_OK - success
579 * DMUB_STATUS_INVALID - unspecified error
581 enum dmub_status dmub_srv_get_gpint_response(struct dmub_srv *dmub,
585 * dmub_flush_buffer_mem() - Read back entire frame buffer region.
586 * This ensures that the write from x86 has been flushed and will not
588 * @fb: frame buffer to flush
590 * Can be called after software initialization.
592 void dmub_flush_buffer_mem(const struct dmub_fb *fb);
594 #if defined(__cplusplus)
598 #endif /* _DMUB_SRV_H_ */