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>
35 #define KFD_INTERFACE_VERSION 1
42 enum kgd_memory_pool {
43 KGD_POOL_SYSTEM_CACHEABLE = 1,
44 KGD_POOL_SYSTEM_WRITECOMBINE = 2,
45 KGD_POOL_FRAMEBUFFER = 3,
48 enum kgd_engine_type {
59 struct kgd2kfd_shared_resources {
60 /* Bit n == 1 means VMID n is available for KFD. */
61 unsigned int compute_vmid_bitmap;
63 /* Compute pipes are counted starting from MEC0/pipe0 as 0. */
64 unsigned int first_compute_pipe;
66 /* Number of MEC pipes available for KFD. */
67 unsigned int compute_pipe_count;
69 /* Base address of doorbell aperture. */
70 phys_addr_t doorbell_physical_address;
72 /* Size in bytes of doorbell aperture. */
73 size_t doorbell_aperture_size;
75 /* Number of bytes at start of aperture reserved for KGD. */
76 size_t doorbell_start_offset;
80 * struct kfd2kgd_calls
82 * @init_gtt_mem_allocation: Allocate a buffer on the gart aperture.
83 * The buffer can be used for mqds, hpds, kernel queue, fence and runlists
85 * @free_gtt_mem: Frees a buffer that was allocated on the gart aperture
87 * @get_vmem_size: Retrieves (physical) size of VRAM
89 * @get_gpu_clock_counter: Retrieves GPU clock counter
91 * @get_max_engine_clock_in_mhz: Retrieves maximum GPU clock in MHz
93 * @program_sh_mem_settings: A function that should initiate the memory
94 * properties such as main aperture memory type (cache / non cached) and
95 * secondary aperture base address, size and memory type.
96 * This function is used only for no cp scheduling mode.
98 * @set_pasid_vmid_mapping: Exposes pasid/vmid pair to the H/W for no cp
99 * scheduling mode. Only used for no cp scheduling mode.
101 * @init_pipeline: Initialized the compute pipelines.
103 * @hqd_load: Loads the mqd structure to a H/W hqd slot. used only for no cp
106 * @hqd_sdma_load: Loads the SDMA mqd structure to a H/W SDMA hqd slot.
107 * used only for no HWS mode.
109 * @hqd_is_occupies: Checks if a hqd slot is occupied.
111 * @hqd_destroy: Destructs and preempts the queue assigned to that hqd slot.
113 * @hqd_sdma_is_occupied: Checks if an SDMA hqd slot is occupied.
115 * @hqd_sdma_destroy: Destructs and preempts the SDMA queue assigned to that
118 * @get_fw_version: Returns FW versions from the header
120 * This structure contains function pointers to services that the kgd driver
121 * provides to amdkfd driver.
124 struct kfd2kgd_calls {
125 int (*init_gtt_mem_allocation)(struct kgd_dev *kgd, size_t size,
126 void **mem_obj, uint64_t *gpu_addr,
129 void (*free_gtt_mem)(struct kgd_dev *kgd, void *mem_obj);
131 uint64_t (*get_vmem_size)(struct kgd_dev *kgd);
132 uint64_t (*get_gpu_clock_counter)(struct kgd_dev *kgd);
134 uint32_t (*get_max_engine_clock_in_mhz)(struct kgd_dev *kgd);
136 /* Register access functions */
137 void (*program_sh_mem_settings)(struct kgd_dev *kgd, uint32_t vmid,
138 uint32_t sh_mem_config, uint32_t sh_mem_ape1_base,
139 uint32_t sh_mem_ape1_limit, uint32_t sh_mem_bases);
141 int (*set_pasid_vmid_mapping)(struct kgd_dev *kgd, unsigned int pasid,
144 int (*init_pipeline)(struct kgd_dev *kgd, uint32_t pipe_id,
145 uint32_t hpd_size, uint64_t hpd_gpu_addr);
147 int (*hqd_load)(struct kgd_dev *kgd, void *mqd, uint32_t pipe_id,
148 uint32_t queue_id, uint32_t __user *wptr);
150 int (*hqd_sdma_load)(struct kgd_dev *kgd, void *mqd);
152 bool (*hqd_is_occupied)(struct kgd_dev *kgd, uint64_t queue_address,
153 uint32_t pipe_id, uint32_t queue_id);
155 int (*hqd_destroy)(struct kgd_dev *kgd, uint32_t reset_type,
156 unsigned int timeout, uint32_t pipe_id,
159 bool (*hqd_sdma_is_occupied)(struct kgd_dev *kgd, void *mqd);
161 int (*hqd_sdma_destroy)(struct kgd_dev *kgd, void *mqd,
162 unsigned int timeout);
164 uint16_t (*get_fw_version)(struct kgd_dev *kgd,
165 enum kgd_engine_type type);
169 * struct kgd2kfd_calls
171 * @exit: Notifies amdkfd that kgd module is unloaded
173 * @probe: Notifies amdkfd about a probe done on a device in the kgd driver.
175 * @device_init: Initialize the newly probed device (if it is a device that
178 * @device_exit: Notifies amdkfd about a removal of a kgd device
180 * @suspend: Notifies amdkfd about a suspend action done to a kgd device
182 * @resume: Notifies amdkfd about a resume action done to a kgd device
184 * This structure contains function callback pointers so the kgd driver
185 * will notify to the amdkfd about certain status changes.
188 struct kgd2kfd_calls {
190 struct kfd_dev* (*probe)(struct kgd_dev *kgd, struct pci_dev *pdev,
191 const struct kfd2kgd_calls *f2g);
192 bool (*device_init)(struct kfd_dev *kfd,
193 const struct kgd2kfd_shared_resources *gpu_resources);
194 void (*device_exit)(struct kfd_dev *kfd);
195 void (*interrupt)(struct kfd_dev *kfd, const void *ih_ring_entry);
196 void (*suspend)(struct kfd_dev *kfd);
197 int (*resume)(struct kfd_dev *kfd);
200 bool kgd2kfd_init(unsigned interface_version,
201 const struct kgd2kfd_calls **g2f);
203 #endif /* KGD_KFD_INTERFACE_H_INCLUDED */