2 * Copyright 2014 Advanced Micro Devices, Inc.
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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,
50 struct kfd_vm_fault_info {
62 uint32_t num_shader_engines;
63 uint32_t num_shader_arrays_per_engine;
64 uint32_t num_cu_per_sh;
65 uint32_t cu_active_number;
68 uint32_t max_waves_per_simd;
69 uint32_t wave_front_size;
70 uint32_t max_scratch_slots_per_cu;
72 uint32_t cu_bitmap[4][4];
75 /* For getting GPU local memory information from KGD */
76 struct kfd_local_mem_info {
77 uint64_t local_mem_size_private;
78 uint64_t local_mem_size_public;
83 enum kgd_memory_pool {
84 KGD_POOL_SYSTEM_CACHEABLE = 1,
85 KGD_POOL_SYSTEM_WRITECOMBINE = 2,
86 KGD_POOL_FRAMEBUFFER = 3,
89 enum kgd_engine_type {
102 * enum kfd_sched_policy
104 * @KFD_SCHED_POLICY_HWS: H/W scheduling policy known as command processor (cp)
105 * scheduling. In this scheduling mode we're using the firmware code to
106 * schedule the user mode queues and kernel queues such as HIQ and DIQ.
107 * the HIQ queue is used as a special queue that dispatches the configuration
108 * to the cp and the user mode queues list that are currently running.
109 * the DIQ queue is a debugging queue that dispatches debugging commands to the
111 * in this scheduling mode user mode queues over subscription feature is
114 * @KFD_SCHED_POLICY_HWS_NO_OVERSUBSCRIPTION: The same as above but the over
115 * subscription feature disabled.
117 * @KFD_SCHED_POLICY_NO_HWS: no H/W scheduling policy is a mode which directly
118 * set the command processor registers and sets the queues "manually". This
119 * mode is used *ONLY* for debugging proposes.
122 enum kfd_sched_policy {
123 KFD_SCHED_POLICY_HWS = 0,
124 KFD_SCHED_POLICY_HWS_NO_OVERSUBSCRIPTION,
125 KFD_SCHED_POLICY_NO_HWS
128 struct kgd2kfd_shared_resources {
129 /* Bit n == 1 means VMID n is available for KFD. */
130 unsigned int compute_vmid_bitmap;
132 /* number of pipes per mec */
133 uint32_t num_pipe_per_mec;
135 /* number of queues per pipe */
136 uint32_t num_queue_per_pipe;
138 /* Bit n == 1 means Queue n is available for KFD */
139 DECLARE_BITMAP(queue_bitmap, KGD_MAX_QUEUES);
141 /* Doorbell assignments (SOC15 and later chips only). Only
142 * specific doorbells are routed to each SDMA engine. Others
143 * are routed to IH and VCN. They are not usable by the CP.
145 * Any doorbell number D that satisfies the following condition
146 * is reserved: (D & reserved_doorbell_mask) == reserved_doorbell_val
148 * KFD currently uses 1024 (= 0x3ff) doorbells per process. If
149 * doorbells 0x0e0-0x0ff and 0x2e0-0x2ff are reserved, that means
150 * mask would be set to 0x1e0 and val set to 0x0e0.
152 unsigned int sdma_doorbell[2][8];
153 unsigned int reserved_doorbell_mask;
154 unsigned int reserved_doorbell_val;
156 /* Base address of doorbell aperture. */
157 phys_addr_t doorbell_physical_address;
159 /* Size in bytes of doorbell aperture. */
160 size_t doorbell_aperture_size;
162 /* Number of bytes at start of aperture reserved for KGD. */
163 size_t doorbell_start_offset;
165 /* GPUVM address space size in bytes */
168 /* Minor device number of the render node */
169 int drm_render_minor;
173 uint32_t *tile_config_ptr;
174 uint32_t *macro_tile_config_ptr;
175 uint32_t num_tile_configs;
176 uint32_t num_macro_tile_configs;
178 uint32_t gb_addr_config;
183 #define KFD_MAX_NUM_OF_QUEUES_PER_DEVICE_DEFAULT 4096
186 * Allocation flag domains
187 * NOTE: This must match the corresponding definitions in kfd_ioctl.h.
189 #define ALLOC_MEM_FLAGS_VRAM (1 << 0)
190 #define ALLOC_MEM_FLAGS_GTT (1 << 1)
191 #define ALLOC_MEM_FLAGS_USERPTR (1 << 2)
192 #define ALLOC_MEM_FLAGS_DOORBELL (1 << 3)
195 * Allocation flags attributes/access options.
196 * NOTE: This must match the corresponding definitions in kfd_ioctl.h.
198 #define ALLOC_MEM_FLAGS_WRITABLE (1 << 31)
199 #define ALLOC_MEM_FLAGS_EXECUTABLE (1 << 30)
200 #define ALLOC_MEM_FLAGS_PUBLIC (1 << 29)
201 #define ALLOC_MEM_FLAGS_NO_SUBSTITUTE (1 << 28) /* TODO */
202 #define ALLOC_MEM_FLAGS_AQL_QUEUE_MEM (1 << 27)
203 #define ALLOC_MEM_FLAGS_COHERENT (1 << 26) /* For GFXv9 or later */
206 * struct kfd2kgd_calls
208 * @program_sh_mem_settings: A function that should initiate the memory
209 * properties such as main aperture memory type (cache / non cached) and
210 * secondary aperture base address, size and memory type.
211 * This function is used only for no cp scheduling mode.
213 * @set_pasid_vmid_mapping: Exposes pasid/vmid pair to the H/W for no cp
214 * scheduling mode. Only used for no cp scheduling mode.
216 * @hqd_load: Loads the mqd structure to a H/W hqd slot. used only for no cp
219 * @hqd_sdma_load: Loads the SDMA mqd structure to a H/W SDMA hqd slot.
220 * used only for no HWS mode.
222 * @hqd_dump: Dumps CPC HQD registers to an array of address-value pairs.
223 * Array is allocated with kmalloc, needs to be freed with kfree by caller.
225 * @hqd_sdma_dump: Dumps SDMA HQD registers to an array of address-value pairs.
226 * Array is allocated with kmalloc, needs to be freed with kfree by caller.
228 * @hqd_is_occupies: Checks if a hqd slot is occupied.
230 * @hqd_destroy: Destructs and preempts the queue assigned to that hqd slot.
232 * @hqd_sdma_is_occupied: Checks if an SDMA hqd slot is occupied.
234 * @hqd_sdma_destroy: Destructs and preempts the SDMA queue assigned to that
237 * @get_fw_version: Returns FW versions from the header
239 * @set_scratch_backing_va: Sets VA for scratch backing memory of a VMID.
240 * Only used for no cp scheduling mode
242 * @get_tile_config: Returns GPU-specific tiling mode information
244 * @set_vm_context_page_table_base: Program page table base for a VMID
246 * @invalidate_tlbs: Invalidate TLBs for a specific PASID
248 * @invalidate_tlbs_vmid: Invalidate TLBs for a specific VMID
250 * @read_vmid_from_vmfault_reg: On Hawaii the VMID is not set in the
251 * IH ring entry. This function allows the KFD ISR to get the VMID
252 * from the fault status register as early as possible.
254 * @get_hive_id: Returns hive id of current device, 0 if xgmi is not enabled
256 * This structure contains function pointers to services that the kgd driver
257 * provides to amdkfd driver.
260 struct kfd2kgd_calls {
261 /* Register access functions */
262 void (*program_sh_mem_settings)(struct kgd_dev *kgd, uint32_t vmid,
263 uint32_t sh_mem_config, uint32_t sh_mem_ape1_base,
264 uint32_t sh_mem_ape1_limit, uint32_t sh_mem_bases);
266 int (*set_pasid_vmid_mapping)(struct kgd_dev *kgd, unsigned int pasid,
269 int (*init_interrupts)(struct kgd_dev *kgd, uint32_t pipe_id);
271 int (*hqd_load)(struct kgd_dev *kgd, void *mqd, uint32_t pipe_id,
272 uint32_t queue_id, uint32_t __user *wptr,
273 uint32_t wptr_shift, uint32_t wptr_mask,
274 struct mm_struct *mm);
276 int (*hqd_sdma_load)(struct kgd_dev *kgd, void *mqd,
277 uint32_t __user *wptr, struct mm_struct *mm);
279 int (*hqd_dump)(struct kgd_dev *kgd,
280 uint32_t pipe_id, uint32_t queue_id,
281 uint32_t (**dump)[2], uint32_t *n_regs);
283 int (*hqd_sdma_dump)(struct kgd_dev *kgd,
284 uint32_t engine_id, uint32_t queue_id,
285 uint32_t (**dump)[2], uint32_t *n_regs);
287 bool (*hqd_is_occupied)(struct kgd_dev *kgd, uint64_t queue_address,
288 uint32_t pipe_id, uint32_t queue_id);
290 int (*hqd_destroy)(struct kgd_dev *kgd, void *mqd, uint32_t reset_type,
291 unsigned int timeout, uint32_t pipe_id,
294 bool (*hqd_sdma_is_occupied)(struct kgd_dev *kgd, void *mqd);
296 int (*hqd_sdma_destroy)(struct kgd_dev *kgd, void *mqd,
297 unsigned int timeout);
299 int (*address_watch_disable)(struct kgd_dev *kgd);
300 int (*address_watch_execute)(struct kgd_dev *kgd,
301 unsigned int watch_point_id,
305 int (*wave_control_execute)(struct kgd_dev *kgd,
306 uint32_t gfx_index_val,
308 uint32_t (*address_watch_get_offset)(struct kgd_dev *kgd,
309 unsigned int watch_point_id,
310 unsigned int reg_offset);
311 bool (*get_atc_vmid_pasid_mapping_valid)(
314 uint16_t (*get_atc_vmid_pasid_mapping_pasid)(
318 uint16_t (*get_fw_version)(struct kgd_dev *kgd,
319 enum kgd_engine_type type);
320 void (*set_scratch_backing_va)(struct kgd_dev *kgd,
321 uint64_t va, uint32_t vmid);
322 int (*get_tile_config)(struct kgd_dev *kgd, struct tile_config *config);
324 void (*set_vm_context_page_table_base)(struct kgd_dev *kgd,
325 uint32_t vmid, uint64_t page_table_base);
326 int (*invalidate_tlbs)(struct kgd_dev *kgd, uint16_t pasid);
327 int (*invalidate_tlbs_vmid)(struct kgd_dev *kgd, uint16_t vmid);
328 uint32_t (*read_vmid_from_vmfault_reg)(struct kgd_dev *kgd);
329 uint64_t (*get_hive_id)(struct kgd_dev *kgd);
334 * struct kgd2kfd_calls
336 * @exit: Notifies amdkfd that kgd module is unloaded
338 * @probe: Notifies amdkfd about a probe done on a device in the kgd driver.
340 * @device_init: Initialize the newly probed device (if it is a device that
343 * @device_exit: Notifies amdkfd about a removal of a kgd device
345 * @suspend: Notifies amdkfd about a suspend action done to a kgd device
347 * @resume: Notifies amdkfd about a resume action done to a kgd device
349 * @quiesce_mm: Quiesce all user queue access to specified MM address space
351 * @resume_mm: Resume user queue access to specified MM address space
353 * @schedule_evict_and_restore_process: Schedules work queue that will prepare
354 * for safe eviction of KFD BOs that belong to the specified process.
356 * @pre_reset: Notifies amdkfd that amdgpu about to reset the gpu
358 * @post_reset: Notify amdkfd that amgpu successfully reseted the gpu
360 * This structure contains function callback pointers so the kgd driver
361 * will notify to the amdkfd about certain status changes.
364 struct kgd2kfd_calls {
366 struct kfd_dev* (*probe)(struct kgd_dev *kgd, struct pci_dev *pdev,
367 const struct kfd2kgd_calls *f2g);
368 bool (*device_init)(struct kfd_dev *kfd,
369 const struct kgd2kfd_shared_resources *gpu_resources);
370 void (*device_exit)(struct kfd_dev *kfd);
371 void (*interrupt)(struct kfd_dev *kfd, const void *ih_ring_entry);
372 void (*suspend)(struct kfd_dev *kfd);
373 int (*resume)(struct kfd_dev *kfd);
374 int (*quiesce_mm)(struct mm_struct *mm);
375 int (*resume_mm)(struct mm_struct *mm);
376 int (*schedule_evict_and_restore_process)(struct mm_struct *mm,
377 struct dma_fence *fence);
378 int (*pre_reset)(struct kfd_dev *kfd);
379 int (*post_reset)(struct kfd_dev *kfd);
382 int kgd2kfd_init(unsigned interface_version,
383 const struct kgd2kfd_calls **g2f);
385 #endif /* KGD_KFD_INTERFACE_H_INCLUDED */