2 * Copyright 2014 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.
24 * This file defines the private interface between the
25 * AMD kernel graphics drivers and the AMD KFD.
28 #ifndef KGD_KFD_INTERFACE_H_INCLUDED
29 #define KGD_KFD_INTERFACE_H_INCLUDED
31 #include <linux/types.h>
32 #include <linux/bitmap.h>
33 #include <linux/dma-fence.h>
37 #define KFD_INTERFACE_VERSION 2
38 #define KGD_MAX_QUEUES 128
45 enum kfd_preempt_type {
46 KFD_PREEMPT_TYPE_WAVEFRONT_DRAIN = 0,
47 KFD_PREEMPT_TYPE_WAVEFRONT_RESET,
51 uint32_t num_shader_engines;
52 uint32_t num_shader_arrays_per_engine;
53 uint32_t num_cu_per_sh;
54 uint32_t cu_active_number;
57 uint32_t max_waves_per_simd;
58 uint32_t wave_front_size;
59 uint32_t max_scratch_slots_per_cu;
61 uint32_t cu_bitmap[4][4];
64 /* For getting GPU local memory information from KGD */
65 struct kfd_local_mem_info {
66 uint64_t local_mem_size_private;
67 uint64_t local_mem_size_public;
72 enum kgd_memory_pool {
73 KGD_POOL_SYSTEM_CACHEABLE = 1,
74 KGD_POOL_SYSTEM_WRITECOMBINE = 2,
75 KGD_POOL_FRAMEBUFFER = 3,
78 enum kgd_engine_type {
90 struct kgd2kfd_shared_resources {
91 /* Bit n == 1 means VMID n is available for KFD. */
92 unsigned int compute_vmid_bitmap;
94 /* number of pipes per mec */
95 uint32_t num_pipe_per_mec;
97 /* number of queues per pipe */
98 uint32_t num_queue_per_pipe;
100 /* Bit n == 1 means Queue n is available for KFD */
101 DECLARE_BITMAP(queue_bitmap, KGD_MAX_QUEUES);
103 /* Doorbell assignments (SOC15 and later chips only). Only
104 * specific doorbells are routed to each SDMA engine. Others
105 * are routed to IH and VCN. They are not usable by the CP.
107 * Any doorbell number D that satisfies the following condition
108 * is reserved: (D & reserved_doorbell_mask) == reserved_doorbell_val
110 * KFD currently uses 1024 (= 0x3ff) doorbells per process. If
111 * doorbells 0x0f0-0x0f7 and 0x2f-0x2f7 are reserved, that means
112 * mask would be set to 0x1f8 and val set to 0x0f0.
114 unsigned int sdma_doorbell[2][2];
115 unsigned int reserved_doorbell_mask;
116 unsigned int reserved_doorbell_val;
118 /* Base address of doorbell aperture. */
119 phys_addr_t doorbell_physical_address;
121 /* Size in bytes of doorbell aperture. */
122 size_t doorbell_aperture_size;
124 /* Number of bytes at start of aperture reserved for KGD. */
125 size_t doorbell_start_offset;
127 /* GPUVM address space size in bytes */
130 /* Minor device number of the render node */
131 int drm_render_minor;
135 uint32_t *tile_config_ptr;
136 uint32_t *macro_tile_config_ptr;
137 uint32_t num_tile_configs;
138 uint32_t num_macro_tile_configs;
140 uint32_t gb_addr_config;
147 * Allocation flag domains
148 * NOTE: This must match the corresponding definitions in kfd_ioctl.h.
150 #define ALLOC_MEM_FLAGS_VRAM (1 << 0)
151 #define ALLOC_MEM_FLAGS_GTT (1 << 1)
152 #define ALLOC_MEM_FLAGS_USERPTR (1 << 2) /* TODO */
153 #define ALLOC_MEM_FLAGS_DOORBELL (1 << 3) /* TODO */
156 * Allocation flags attributes/access options.
157 * NOTE: This must match the corresponding definitions in kfd_ioctl.h.
159 #define ALLOC_MEM_FLAGS_WRITABLE (1 << 31)
160 #define ALLOC_MEM_FLAGS_EXECUTABLE (1 << 30)
161 #define ALLOC_MEM_FLAGS_PUBLIC (1 << 29)
162 #define ALLOC_MEM_FLAGS_NO_SUBSTITUTE (1 << 28) /* TODO */
163 #define ALLOC_MEM_FLAGS_AQL_QUEUE_MEM (1 << 27)
164 #define ALLOC_MEM_FLAGS_COHERENT (1 << 26) /* For GFXv9 or later */
167 * struct kfd2kgd_calls
169 * @init_gtt_mem_allocation: Allocate a buffer on the gart aperture.
170 * The buffer can be used for mqds, hpds, kernel queue, fence and runlists
172 * @free_gtt_mem: Frees a buffer that was allocated on the gart aperture
174 * @get_local_mem_info: Retrieves information about GPU local memory
176 * @get_gpu_clock_counter: Retrieves GPU clock counter
178 * @get_max_engine_clock_in_mhz: Retrieves maximum GPU clock in MHz
180 * @alloc_pasid: Allocate a PASID
181 * @free_pasid: Free a PASID
183 * @program_sh_mem_settings: A function that should initiate the memory
184 * properties such as main aperture memory type (cache / non cached) and
185 * secondary aperture base address, size and memory type.
186 * This function is used only for no cp scheduling mode.
188 * @set_pasid_vmid_mapping: Exposes pasid/vmid pair to the H/W for no cp
189 * scheduling mode. Only used for no cp scheduling mode.
191 * @hqd_load: Loads the mqd structure to a H/W hqd slot. used only for no cp
194 * @hqd_sdma_load: Loads the SDMA mqd structure to a H/W SDMA hqd slot.
195 * used only for no HWS mode.
197 * @hqd_dump: Dumps CPC HQD registers to an array of address-value pairs.
198 * Array is allocated with kmalloc, needs to be freed with kfree by caller.
200 * @hqd_sdma_dump: Dumps SDMA HQD registers to an array of address-value pairs.
201 * Array is allocated with kmalloc, needs to be freed with kfree by caller.
203 * @hqd_is_occupies: Checks if a hqd slot is occupied.
205 * @hqd_destroy: Destructs and preempts the queue assigned to that hqd slot.
207 * @hqd_sdma_is_occupied: Checks if an SDMA hqd slot is occupied.
209 * @hqd_sdma_destroy: Destructs and preempts the SDMA queue assigned to that
212 * @get_fw_version: Returns FW versions from the header
214 * @set_scratch_backing_va: Sets VA for scratch backing memory of a VMID.
215 * Only used for no cp scheduling mode
217 * @get_tile_config: Returns GPU-specific tiling mode information
219 * @get_cu_info: Retrieves activated cu info
221 * @get_vram_usage: Returns current VRAM usage
223 * @create_process_vm: Create a VM address space for a given process and GPU
225 * @destroy_process_vm: Destroy a VM
227 * @get_process_page_dir: Get physical address of a VM page directory
229 * @set_vm_context_page_table_base: Program page table base for a VMID
231 * @alloc_memory_of_gpu: Allocate GPUVM memory
233 * @free_memory_of_gpu: Free GPUVM memory
235 * @map_memory_to_gpu: Map GPUVM memory into a specific VM address
236 * space. Allocates and updates page tables and page directories as
237 * needed. This function may return before all page table updates have
238 * completed. This allows multiple map operations (on multiple GPUs)
239 * to happen concurrently. Use sync_memory to synchronize with all
242 * @unmap_memor_to_gpu: Unmap GPUVM memory from a specific VM address space
244 * @sync_memory: Wait for pending page table updates to complete
246 * @map_gtt_bo_to_kernel: Map a GTT BO for kernel access
247 * Pins the BO, maps it to kernel address space. Such BOs are never evicted.
248 * The kernel virtual address remains valid until the BO is freed.
250 * @restore_process_bos: Restore all BOs that belong to the
251 * process. This is intended for restoring memory mappings after a TTM
254 * @invalidate_tlbs: Invalidate TLBs for a specific PASID
256 * @invalidate_tlbs_vmid: Invalidate TLBs for a specific VMID
258 * @submit_ib: Submits an IB to the engine specified by inserting the
259 * IB to the corresponding ring (ring type). The IB is executed with the
260 * specified VMID in a user mode context.
262 * This structure contains function pointers to services that the kgd driver
263 * provides to amdkfd driver.
266 struct kfd2kgd_calls {
267 int (*init_gtt_mem_allocation)(struct kgd_dev *kgd, size_t size,
268 void **mem_obj, uint64_t *gpu_addr,
271 void (*free_gtt_mem)(struct kgd_dev *kgd, void *mem_obj);
273 void (*get_local_mem_info)(struct kgd_dev *kgd,
274 struct kfd_local_mem_info *mem_info);
275 uint64_t (*get_gpu_clock_counter)(struct kgd_dev *kgd);
277 uint32_t (*get_max_engine_clock_in_mhz)(struct kgd_dev *kgd);
279 int (*alloc_pasid)(unsigned int bits);
280 void (*free_pasid)(unsigned int pasid);
282 /* Register access functions */
283 void (*program_sh_mem_settings)(struct kgd_dev *kgd, uint32_t vmid,
284 uint32_t sh_mem_config, uint32_t sh_mem_ape1_base,
285 uint32_t sh_mem_ape1_limit, uint32_t sh_mem_bases);
287 int (*set_pasid_vmid_mapping)(struct kgd_dev *kgd, unsigned int pasid,
290 int (*init_interrupts)(struct kgd_dev *kgd, uint32_t pipe_id);
292 int (*hqd_load)(struct kgd_dev *kgd, void *mqd, uint32_t pipe_id,
293 uint32_t queue_id, uint32_t __user *wptr,
294 uint32_t wptr_shift, uint32_t wptr_mask,
295 struct mm_struct *mm);
297 int (*hqd_sdma_load)(struct kgd_dev *kgd, void *mqd,
298 uint32_t __user *wptr, struct mm_struct *mm);
300 int (*hqd_dump)(struct kgd_dev *kgd,
301 uint32_t pipe_id, uint32_t queue_id,
302 uint32_t (**dump)[2], uint32_t *n_regs);
304 int (*hqd_sdma_dump)(struct kgd_dev *kgd,
305 uint32_t engine_id, uint32_t queue_id,
306 uint32_t (**dump)[2], uint32_t *n_regs);
308 bool (*hqd_is_occupied)(struct kgd_dev *kgd, uint64_t queue_address,
309 uint32_t pipe_id, uint32_t queue_id);
311 int (*hqd_destroy)(struct kgd_dev *kgd, void *mqd, uint32_t reset_type,
312 unsigned int timeout, uint32_t pipe_id,
315 bool (*hqd_sdma_is_occupied)(struct kgd_dev *kgd, void *mqd);
317 int (*hqd_sdma_destroy)(struct kgd_dev *kgd, void *mqd,
318 unsigned int timeout);
320 int (*address_watch_disable)(struct kgd_dev *kgd);
321 int (*address_watch_execute)(struct kgd_dev *kgd,
322 unsigned int watch_point_id,
326 int (*wave_control_execute)(struct kgd_dev *kgd,
327 uint32_t gfx_index_val,
329 uint32_t (*address_watch_get_offset)(struct kgd_dev *kgd,
330 unsigned int watch_point_id,
331 unsigned int reg_offset);
332 bool (*get_atc_vmid_pasid_mapping_valid)(
335 uint16_t (*get_atc_vmid_pasid_mapping_pasid)(
339 uint16_t (*get_fw_version)(struct kgd_dev *kgd,
340 enum kgd_engine_type type);
341 void (*set_scratch_backing_va)(struct kgd_dev *kgd,
342 uint64_t va, uint32_t vmid);
343 int (*get_tile_config)(struct kgd_dev *kgd, struct tile_config *config);
345 void (*get_cu_info)(struct kgd_dev *kgd,
346 struct kfd_cu_info *cu_info);
347 uint64_t (*get_vram_usage)(struct kgd_dev *kgd);
349 int (*create_process_vm)(struct kgd_dev *kgd, void **vm,
350 void **process_info, struct dma_fence **ef);
351 int (*acquire_process_vm)(struct kgd_dev *kgd, struct file *filp,
352 void **vm, void **process_info, struct dma_fence **ef);
353 void (*destroy_process_vm)(struct kgd_dev *kgd, void *vm);
354 uint32_t (*get_process_page_dir)(void *vm);
355 void (*set_vm_context_page_table_base)(struct kgd_dev *kgd,
356 uint32_t vmid, uint32_t page_table_base);
357 int (*alloc_memory_of_gpu)(struct kgd_dev *kgd, uint64_t va,
358 uint64_t size, void *vm,
359 struct kgd_mem **mem, uint64_t *offset,
361 int (*free_memory_of_gpu)(struct kgd_dev *kgd, struct kgd_mem *mem);
362 int (*map_memory_to_gpu)(struct kgd_dev *kgd, struct kgd_mem *mem,
364 int (*unmap_memory_to_gpu)(struct kgd_dev *kgd, struct kgd_mem *mem,
366 int (*sync_memory)(struct kgd_dev *kgd, struct kgd_mem *mem, bool intr);
367 int (*map_gtt_bo_to_kernel)(struct kgd_dev *kgd, struct kgd_mem *mem,
368 void **kptr, uint64_t *size);
369 int (*restore_process_bos)(void *process_info, struct dma_fence **ef);
371 int (*invalidate_tlbs)(struct kgd_dev *kgd, uint16_t pasid);
372 int (*invalidate_tlbs_vmid)(struct kgd_dev *kgd, uint16_t vmid);
374 int (*submit_ib)(struct kgd_dev *kgd, enum kgd_engine_type engine,
375 uint32_t vmid, uint64_t gpu_addr,
376 uint32_t *ib_cmd, uint32_t ib_len);
380 * struct kgd2kfd_calls
382 * @exit: Notifies amdkfd that kgd module is unloaded
384 * @probe: Notifies amdkfd about a probe done on a device in the kgd driver.
386 * @device_init: Initialize the newly probed device (if it is a device that
389 * @device_exit: Notifies amdkfd about a removal of a kgd device
391 * @suspend: Notifies amdkfd about a suspend action done to a kgd device
393 * @resume: Notifies amdkfd about a resume action done to a kgd device
395 * @quiesce_mm: Quiesce all user queue access to specified MM address space
397 * @resume_mm: Resume user queue access to specified MM address space
399 * @schedule_evict_and_restore_process: Schedules work queue that will prepare
400 * for safe eviction of KFD BOs that belong to the specified process.
402 * This structure contains function callback pointers so the kgd driver
403 * will notify to the amdkfd about certain status changes.
406 struct kgd2kfd_calls {
408 struct kfd_dev* (*probe)(struct kgd_dev *kgd, struct pci_dev *pdev,
409 const struct kfd2kgd_calls *f2g);
410 bool (*device_init)(struct kfd_dev *kfd,
411 const struct kgd2kfd_shared_resources *gpu_resources);
412 void (*device_exit)(struct kfd_dev *kfd);
413 void (*interrupt)(struct kfd_dev *kfd, const void *ih_ring_entry);
414 void (*suspend)(struct kfd_dev *kfd);
415 int (*resume)(struct kfd_dev *kfd);
416 int (*quiesce_mm)(struct mm_struct *mm);
417 int (*resume_mm)(struct mm_struct *mm);
418 int (*schedule_evict_and_restore_process)(struct mm_struct *mm,
419 struct dma_fence *fence);
422 int kgd2kfd_init(unsigned interface_version,
423 const struct kgd2kfd_calls **g2f);
425 #endif /* KGD_KFD_INTERFACE_H_INCLUDED */