2 * Copyright 2014 Advanced Micro Devices, Inc.
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11 * The above copyright notice and this permission notice shall be included in
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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>
36 #define KFD_INTERFACE_VERSION 2
37 #define KGD_MAX_QUEUES 128
44 enum kfd_preempt_type {
45 KFD_PREEMPT_TYPE_WAVEFRONT_DRAIN = 0,
46 KFD_PREEMPT_TYPE_WAVEFRONT_RESET,
49 enum kgd_memory_pool {
50 KGD_POOL_SYSTEM_CACHEABLE = 1,
51 KGD_POOL_SYSTEM_WRITECOMBINE = 2,
52 KGD_POOL_FRAMEBUFFER = 3,
55 enum kgd_engine_type {
67 struct kgd2kfd_shared_resources {
68 /* Bit n == 1 means VMID n is available for KFD. */
69 unsigned int compute_vmid_bitmap;
71 /* number of pipes per mec */
72 uint32_t num_pipe_per_mec;
74 /* number of queues per pipe */
75 uint32_t num_queue_per_pipe;
77 /* Bit n == 1 means Queue n is available for KFD */
78 DECLARE_BITMAP(queue_bitmap, KGD_MAX_QUEUES);
80 /* Base address of doorbell aperture. */
81 phys_addr_t doorbell_physical_address;
83 /* Size in bytes of doorbell aperture. */
84 size_t doorbell_aperture_size;
86 /* Number of bytes at start of aperture reserved for KGD. */
87 size_t doorbell_start_offset;
91 * struct kfd2kgd_calls
93 * @init_gtt_mem_allocation: Allocate a buffer on the gart aperture.
94 * The buffer can be used for mqds, hpds, kernel queue, fence and runlists
96 * @free_gtt_mem: Frees a buffer that was allocated on the gart aperture
98 * @get_vmem_size: Retrieves (physical) size of VRAM
100 * @get_gpu_clock_counter: Retrieves GPU clock counter
102 * @get_max_engine_clock_in_mhz: Retrieves maximum GPU clock in MHz
104 * @program_sh_mem_settings: A function that should initiate the memory
105 * properties such as main aperture memory type (cache / non cached) and
106 * secondary aperture base address, size and memory type.
107 * This function is used only for no cp scheduling mode.
109 * @set_pasid_vmid_mapping: Exposes pasid/vmid pair to the H/W for no cp
110 * scheduling mode. Only used for no cp scheduling mode.
112 * @init_pipeline: Initialized the compute pipelines.
114 * @hqd_load: Loads the mqd structure to a H/W hqd slot. used only for no cp
117 * @hqd_sdma_load: Loads the SDMA mqd structure to a H/W SDMA hqd slot.
118 * used only for no HWS mode.
120 * @hqd_is_occupies: Checks if a hqd slot is occupied.
122 * @hqd_destroy: Destructs and preempts the queue assigned to that hqd slot.
124 * @hqd_sdma_is_occupied: Checks if an SDMA hqd slot is occupied.
126 * @hqd_sdma_destroy: Destructs and preempts the SDMA queue assigned to that
129 * @get_fw_version: Returns FW versions from the header
131 * This structure contains function pointers to services that the kgd driver
132 * provides to amdkfd driver.
135 struct kfd2kgd_calls {
136 int (*init_gtt_mem_allocation)(struct kgd_dev *kgd, size_t size,
137 void **mem_obj, uint64_t *gpu_addr,
140 void (*free_gtt_mem)(struct kgd_dev *kgd, void *mem_obj);
142 uint64_t (*get_vmem_size)(struct kgd_dev *kgd);
143 uint64_t (*get_gpu_clock_counter)(struct kgd_dev *kgd);
145 uint32_t (*get_max_engine_clock_in_mhz)(struct kgd_dev *kgd);
147 /* Register access functions */
148 void (*program_sh_mem_settings)(struct kgd_dev *kgd, uint32_t vmid,
149 uint32_t sh_mem_config, uint32_t sh_mem_ape1_base,
150 uint32_t sh_mem_ape1_limit, uint32_t sh_mem_bases);
152 int (*set_pasid_vmid_mapping)(struct kgd_dev *kgd, unsigned int pasid,
155 int (*init_pipeline)(struct kgd_dev *kgd, uint32_t pipe_id,
156 uint32_t hpd_size, uint64_t hpd_gpu_addr);
158 int (*init_interrupts)(struct kgd_dev *kgd, uint32_t pipe_id);
160 int (*hqd_load)(struct kgd_dev *kgd, void *mqd, uint32_t pipe_id,
161 uint32_t queue_id, uint32_t __user *wptr,
162 uint32_t wptr_shift, uint32_t wptr_mask,
163 struct mm_struct *mm);
165 int (*hqd_sdma_load)(struct kgd_dev *kgd, void *mqd);
167 bool (*hqd_is_occupied)(struct kgd_dev *kgd, uint64_t queue_address,
168 uint32_t pipe_id, uint32_t queue_id);
170 int (*hqd_destroy)(struct kgd_dev *kgd, void *mqd, uint32_t reset_type,
171 unsigned int timeout, uint32_t pipe_id,
174 bool (*hqd_sdma_is_occupied)(struct kgd_dev *kgd, void *mqd);
176 int (*hqd_sdma_destroy)(struct kgd_dev *kgd, void *mqd,
177 unsigned int timeout);
179 int (*address_watch_disable)(struct kgd_dev *kgd);
180 int (*address_watch_execute)(struct kgd_dev *kgd,
181 unsigned int watch_point_id,
185 int (*wave_control_execute)(struct kgd_dev *kgd,
186 uint32_t gfx_index_val,
188 uint32_t (*address_watch_get_offset)(struct kgd_dev *kgd,
189 unsigned int watch_point_id,
190 unsigned int reg_offset);
191 bool (*get_atc_vmid_pasid_mapping_valid)(
194 uint16_t (*get_atc_vmid_pasid_mapping_pasid)(
197 void (*write_vmid_invalidate_request)(struct kgd_dev *kgd,
200 uint16_t (*get_fw_version)(struct kgd_dev *kgd,
201 enum kgd_engine_type type);
205 * struct kgd2kfd_calls
207 * @exit: Notifies amdkfd that kgd module is unloaded
209 * @probe: Notifies amdkfd about a probe done on a device in the kgd driver.
211 * @device_init: Initialize the newly probed device (if it is a device that
214 * @device_exit: Notifies amdkfd about a removal of a kgd device
216 * @suspend: Notifies amdkfd about a suspend action done to a kgd device
218 * @resume: Notifies amdkfd about a resume action done to a kgd device
220 * This structure contains function callback pointers so the kgd driver
221 * will notify to the amdkfd about certain status changes.
224 struct kgd2kfd_calls {
226 struct kfd_dev* (*probe)(struct kgd_dev *kgd, struct pci_dev *pdev,
227 const struct kfd2kgd_calls *f2g);
228 bool (*device_init)(struct kfd_dev *kfd,
229 const struct kgd2kfd_shared_resources *gpu_resources);
230 void (*device_exit)(struct kfd_dev *kfd);
231 void (*interrupt)(struct kfd_dev *kfd, const void *ih_ring_entry);
232 void (*suspend)(struct kfd_dev *kfd);
233 int (*resume)(struct kfd_dev *kfd);
236 int kgd2kfd_init(unsigned interface_version,
237 const struct kgd2kfd_calls **g2f);
239 #endif /* KGD_KFD_INTERFACE_H_INCLUDED */