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>
36 #define KFD_INTERFACE_VERSION 2
37 #define KGD_MAX_QUEUES 128
44 enum kgd_memory_pool {
45 KGD_POOL_SYSTEM_CACHEABLE = 1,
46 KGD_POOL_SYSTEM_WRITECOMBINE = 2,
47 KGD_POOL_FRAMEBUFFER = 3,
50 enum kgd_engine_type {
62 struct kgd2kfd_shared_resources {
63 /* Bit n == 1 means VMID n is available for KFD. */
64 unsigned int compute_vmid_bitmap;
66 /* number of pipes per mec */
67 uint32_t num_pipe_per_mec;
69 /* number of queues per pipe */
70 uint32_t num_queue_per_pipe;
72 /* Bit n == 1 means Queue n is available for KFD */
73 DECLARE_BITMAP(queue_bitmap, KGD_MAX_QUEUES);
75 /* Base address of doorbell aperture. */
76 phys_addr_t doorbell_physical_address;
78 /* Size in bytes of doorbell aperture. */
79 size_t doorbell_aperture_size;
81 /* Number of bytes at start of aperture reserved for KGD. */
82 size_t doorbell_start_offset;
86 * struct kfd2kgd_calls
88 * @init_gtt_mem_allocation: Allocate a buffer on the gart aperture.
89 * The buffer can be used for mqds, hpds, kernel queue, fence and runlists
91 * @free_gtt_mem: Frees a buffer that was allocated on the gart aperture
93 * @get_vmem_size: Retrieves (physical) size of VRAM
95 * @get_gpu_clock_counter: Retrieves GPU clock counter
97 * @get_max_engine_clock_in_mhz: Retrieves maximum GPU clock in MHz
99 * @program_sh_mem_settings: A function that should initiate the memory
100 * properties such as main aperture memory type (cache / non cached) and
101 * secondary aperture base address, size and memory type.
102 * This function is used only for no cp scheduling mode.
104 * @set_pasid_vmid_mapping: Exposes pasid/vmid pair to the H/W for no cp
105 * scheduling mode. Only used for no cp scheduling mode.
107 * @init_pipeline: Initialized the compute pipelines.
109 * @hqd_load: Loads the mqd structure to a H/W hqd slot. used only for no cp
112 * @hqd_sdma_load: Loads the SDMA mqd structure to a H/W SDMA hqd slot.
113 * used only for no HWS mode.
115 * @hqd_is_occupies: Checks if a hqd slot is occupied.
117 * @hqd_destroy: Destructs and preempts the queue assigned to that hqd slot.
119 * @hqd_sdma_is_occupied: Checks if an SDMA hqd slot is occupied.
121 * @hqd_sdma_destroy: Destructs and preempts the SDMA queue assigned to that
124 * @get_fw_version: Returns FW versions from the header
126 * This structure contains function pointers to services that the kgd driver
127 * provides to amdkfd driver.
130 struct kfd2kgd_calls {
131 int (*init_gtt_mem_allocation)(struct kgd_dev *kgd, size_t size,
132 void **mem_obj, uint64_t *gpu_addr,
135 void (*free_gtt_mem)(struct kgd_dev *kgd, void *mem_obj);
137 uint64_t (*get_vmem_size)(struct kgd_dev *kgd);
138 uint64_t (*get_gpu_clock_counter)(struct kgd_dev *kgd);
140 uint32_t (*get_max_engine_clock_in_mhz)(struct kgd_dev *kgd);
142 /* Register access functions */
143 void (*program_sh_mem_settings)(struct kgd_dev *kgd, uint32_t vmid,
144 uint32_t sh_mem_config, uint32_t sh_mem_ape1_base,
145 uint32_t sh_mem_ape1_limit, uint32_t sh_mem_bases);
147 int (*set_pasid_vmid_mapping)(struct kgd_dev *kgd, unsigned int pasid,
150 int (*init_pipeline)(struct kgd_dev *kgd, uint32_t pipe_id,
151 uint32_t hpd_size, uint64_t hpd_gpu_addr);
153 int (*init_interrupts)(struct kgd_dev *kgd, uint32_t pipe_id);
155 int (*hqd_load)(struct kgd_dev *kgd, void *mqd, uint32_t pipe_id,
156 uint32_t queue_id, uint32_t __user *wptr);
158 int (*hqd_sdma_load)(struct kgd_dev *kgd, void *mqd);
160 bool (*hqd_is_occupied)(struct kgd_dev *kgd, uint64_t queue_address,
161 uint32_t pipe_id, uint32_t queue_id);
163 int (*hqd_destroy)(struct kgd_dev *kgd, uint32_t reset_type,
164 unsigned int timeout, uint32_t pipe_id,
167 bool (*hqd_sdma_is_occupied)(struct kgd_dev *kgd, void *mqd);
169 int (*hqd_sdma_destroy)(struct kgd_dev *kgd, void *mqd,
170 unsigned int timeout);
172 int (*address_watch_disable)(struct kgd_dev *kgd);
173 int (*address_watch_execute)(struct kgd_dev *kgd,
174 unsigned int watch_point_id,
178 int (*wave_control_execute)(struct kgd_dev *kgd,
179 uint32_t gfx_index_val,
181 uint32_t (*address_watch_get_offset)(struct kgd_dev *kgd,
182 unsigned int watch_point_id,
183 unsigned int reg_offset);
184 bool (*get_atc_vmid_pasid_mapping_valid)(
187 uint16_t (*get_atc_vmid_pasid_mapping_pasid)(
190 void (*write_vmid_invalidate_request)(struct kgd_dev *kgd,
193 uint16_t (*get_fw_version)(struct kgd_dev *kgd,
194 enum kgd_engine_type type);
198 * struct kgd2kfd_calls
200 * @exit: Notifies amdkfd that kgd module is unloaded
202 * @probe: Notifies amdkfd about a probe done on a device in the kgd driver.
204 * @device_init: Initialize the newly probed device (if it is a device that
207 * @device_exit: Notifies amdkfd about a removal of a kgd device
209 * @suspend: Notifies amdkfd about a suspend action done to a kgd device
211 * @resume: Notifies amdkfd about a resume action done to a kgd device
213 * This structure contains function callback pointers so the kgd driver
214 * will notify to the amdkfd about certain status changes.
217 struct kgd2kfd_calls {
219 struct kfd_dev* (*probe)(struct kgd_dev *kgd, struct pci_dev *pdev,
220 const struct kfd2kgd_calls *f2g);
221 bool (*device_init)(struct kfd_dev *kfd,
222 const struct kgd2kfd_shared_resources *gpu_resources);
223 void (*device_exit)(struct kfd_dev *kfd);
224 void (*interrupt)(struct kfd_dev *kfd, const void *ih_ring_entry);
225 void (*suspend)(struct kfd_dev *kfd);
226 int (*resume)(struct kfd_dev *kfd);
229 int kgd2kfd_init(unsigned interface_version,
230 const struct kgd2kfd_calls **g2f);
232 #endif /* KGD_KFD_INTERFACE_H_INCLUDED */