1/*
  2 * Copyright 2014 Advanced Micro Devices, Inc.
  3 *
  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:
 10 *
 11 * The above copyright notice and this permission notice shall be included in
 12 * all copies or substantial portions of the Software.
 13 *
 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.
 21 */
 22
 23#include "amdgpu_amdkfd.h"
 24#include "amd_shared.h"
 25#include <drm/drmP.h>
 26#include "amdgpu.h"
 27#include <linux/module.h>
 28
 29const struct kfd2kgd_calls *kfd2kgd;
 30const struct kgd2kfd_calls *kgd2kfd;
 31bool (*kgd2kfd_init_p)(unsigned, const struct kgd2kfd_calls**);
 32
 33int amdgpu_amdkfd_init(void)
 34{
 35	int ret;
 36
 37#if defined(CONFIG_HSA_AMD_MODULE)
 38	int (*kgd2kfd_init_p)(unsigned, const struct kgd2kfd_calls**);
 39
 40	kgd2kfd_init_p = symbol_request(kgd2kfd_init);
 41
 42	if (kgd2kfd_init_p == NULL)
 43		return -ENOENT;
 44
 45	ret = kgd2kfd_init_p(KFD_INTERFACE_VERSION, &kgd2kfd);
 46	if (ret) {
 47		symbol_put(kgd2kfd_init);
 48		kgd2kfd = NULL;
 49	}
 50
 51#elif defined(CONFIG_HSA_AMD)
 52	ret = kgd2kfd_init(KFD_INTERFACE_VERSION, &kgd2kfd);
 53	if (ret)
 54		kgd2kfd = NULL;
 55
 56#else
 57	ret = -ENOENT;
 58#endif
 59
 60	return ret;
 61}
 62
 63bool amdgpu_amdkfd_load_interface(struct amdgpu_device *rdev)
 64{
 65	switch (rdev->asic_type) {
 66#ifdef CONFIG_DRM_AMDGPU_CIK
 67	case CHIP_KAVERI:
 68		kfd2kgd = amdgpu_amdkfd_gfx_7_get_functions();
 69		break;
 70#endif
 71	case CHIP_CARRIZO:
 72		kfd2kgd = amdgpu_amdkfd_gfx_8_0_get_functions();
 73		break;
 74	default:
 75		return false;
 76	}
 77
 78	return true;
 79}
 80
 81void amdgpu_amdkfd_fini(void)
 82{
 83	if (kgd2kfd) {
 84		kgd2kfd->exit();
 85		symbol_put(kgd2kfd_init);
 86	}
 87}
 88
 89void amdgpu_amdkfd_device_probe(struct amdgpu_device *rdev)
 90{
 91	if (kgd2kfd)
 92		rdev->kfd = kgd2kfd->probe((struct kgd_dev *)rdev,
 93					rdev->pdev, kfd2kgd);
 94}
 95
 96void amdgpu_amdkfd_device_init(struct amdgpu_device *rdev)
 97{
 98	if (rdev->kfd) {
 99		struct kgd2kfd_shared_resources gpu_resources = {
100			.compute_vmid_bitmap = 0xFF00,
101
102			.first_compute_pipe = 1,
103			.compute_pipe_count = 4 - 1,
104		};
105
106		amdgpu_doorbell_get_kfd_info(rdev,
107				&gpu_resources.doorbell_physical_address,
108				&gpu_resources.doorbell_aperture_size,
109				&gpu_resources.doorbell_start_offset);
110
111		kgd2kfd->device_init(rdev->kfd, &gpu_resources);
112	}
113}
114
115void amdgpu_amdkfd_device_fini(struct amdgpu_device *rdev)
116{
117	if (rdev->kfd) {
118		kgd2kfd->device_exit(rdev->kfd);
119		rdev->kfd = NULL;
120	}
121}
122
123void amdgpu_amdkfd_interrupt(struct amdgpu_device *rdev,
124		const void *ih_ring_entry)
125{
126	if (rdev->kfd)
127		kgd2kfd->interrupt(rdev->kfd, ih_ring_entry);
128}
129
130void amdgpu_amdkfd_suspend(struct amdgpu_device *rdev)
131{
132	if (rdev->kfd)
133		kgd2kfd->suspend(rdev->kfd);
134}
135
136int amdgpu_amdkfd_resume(struct amdgpu_device *rdev)
137{
138	int r = 0;
139
140	if (rdev->kfd)
141		r = kgd2kfd->resume(rdev->kfd);
142
143	return r;
144}
145
146int alloc_gtt_mem(struct kgd_dev *kgd, size_t size,
147			void **mem_obj, uint64_t *gpu_addr,
148			void **cpu_ptr)
149{
150	struct amdgpu_device *rdev = (struct amdgpu_device *)kgd;
151	struct kgd_mem **mem = (struct kgd_mem **) mem_obj;
152	int r;
153
154	BUG_ON(kgd == NULL);
155	BUG_ON(gpu_addr == NULL);
156	BUG_ON(cpu_ptr == NULL);
157
158	*mem = kmalloc(sizeof(struct kgd_mem), GFP_KERNEL);
159	if ((*mem) == NULL)
160		return -ENOMEM;
161
162	r = amdgpu_bo_create(rdev, size, PAGE_SIZE, true, AMDGPU_GEM_DOMAIN_GTT,
163			     AMDGPU_GEM_CREATE_CPU_GTT_USWC, NULL, NULL, &(*mem)->bo);
164	if (r) {
165		dev_err(rdev->dev,
166			"failed to allocate BO for amdkfd (%d)\n", r);
167		return r;
168	}
169
170	/* map the buffer */
171	r = amdgpu_bo_reserve((*mem)->bo, true);
172	if (r) {
173		dev_err(rdev->dev, "(%d) failed to reserve bo for amdkfd\n", r);
174		goto allocate_mem_reserve_bo_failed;
175	}
176
177	r = amdgpu_bo_pin((*mem)->bo, AMDGPU_GEM_DOMAIN_GTT,
178				&(*mem)->gpu_addr);
179	if (r) {
180		dev_err(rdev->dev, "(%d) failed to pin bo for amdkfd\n", r);
181		goto allocate_mem_pin_bo_failed;
182	}
183	*gpu_addr = (*mem)->gpu_addr;
184
185	r = amdgpu_bo_kmap((*mem)->bo, &(*mem)->cpu_ptr);
186	if (r) {
187		dev_err(rdev->dev,
188			"(%d) failed to map bo to kernel for amdkfd\n", r);
189		goto allocate_mem_kmap_bo_failed;
190	}
191	*cpu_ptr = (*mem)->cpu_ptr;
192
193	amdgpu_bo_unreserve((*mem)->bo);
194
195	return 0;
196
197allocate_mem_kmap_bo_failed:
198	amdgpu_bo_unpin((*mem)->bo);
199allocate_mem_pin_bo_failed:
200	amdgpu_bo_unreserve((*mem)->bo);
201allocate_mem_reserve_bo_failed:
202	amdgpu_bo_unref(&(*mem)->bo);
203
204	return r;
205}
206
207void free_gtt_mem(struct kgd_dev *kgd, void *mem_obj)
208{
209	struct kgd_mem *mem = (struct kgd_mem *) mem_obj;
210
211	BUG_ON(mem == NULL);
212
213	amdgpu_bo_reserve(mem->bo, true);
214	amdgpu_bo_kunmap(mem->bo);
215	amdgpu_bo_unpin(mem->bo);
216	amdgpu_bo_unreserve(mem->bo);
217	amdgpu_bo_unref(&(mem->bo));
218	kfree(mem);
219}
220
221uint64_t get_vmem_size(struct kgd_dev *kgd)
222{
223	struct amdgpu_device *rdev =
224		(struct amdgpu_device *)kgd;
225
226	BUG_ON(kgd == NULL);
227
228	return rdev->mc.real_vram_size;
229}
230
231uint64_t get_gpu_clock_counter(struct kgd_dev *kgd)
232{
233	struct amdgpu_device *rdev = (struct amdgpu_device *)kgd;
234
235	if (rdev->gfx.funcs->get_gpu_clock_counter)
236		return rdev->gfx.funcs->get_gpu_clock_counter(rdev);
237	return 0;
238}
239
240uint32_t get_max_engine_clock_in_mhz(struct kgd_dev *kgd)
241{
242	struct amdgpu_device *rdev = (struct amdgpu_device *)kgd;
243
244	/* The sclk is in quantas of 10kHz */
245	return rdev->pm.dpm.dyn_state.max_clock_voltage_on_ac.sclk / 100;
246}