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1// SPDX-License-Identifier: GPL-2.0 OR MIT
2/*
3 * Copyright 2014-2022 Advanced Micro Devices, Inc.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
19 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
20 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
21 * OTHER DEALINGS IN THE SOFTWARE.
22 *
23 */
24
25#include <linux/types.h>
26#include <linux/mutex.h>
27#include <linux/slab.h>
28#include <linux/printk.h>
29#include <linux/sched.h>
30#include "kfd_kernel_queue.h"
31#include "kfd_priv.h"
32#include "kfd_device_queue_manager.h"
33#include "kfd_pm4_headers.h"
34#include "kfd_pm4_opcodes.h"
35#include "amdgpu_reset.h"
36
37#define PM4_COUNT_ZERO (((1 << 15) - 1) << 16)
38
39/* Initialize a kernel queue, including allocations of GART memory
40 * needed for the queue.
41 */
42static bool kq_initialize(struct kernel_queue *kq, struct kfd_node *dev,
43 enum kfd_queue_type type, unsigned int queue_size)
44{
45 struct queue_properties prop;
46 int retval;
47 union PM4_MES_TYPE_3_HEADER nop;
48
49 if (WARN_ON(type != KFD_QUEUE_TYPE_DIQ && type != KFD_QUEUE_TYPE_HIQ))
50 return false;
51
52 pr_debug("Initializing queue type %d size %d\n", KFD_QUEUE_TYPE_HIQ,
53 queue_size);
54
55 memset(&prop, 0, sizeof(prop));
56 memset(&nop, 0, sizeof(nop));
57
58 nop.opcode = IT_NOP;
59 nop.type = PM4_TYPE_3;
60 nop.u32all |= PM4_COUNT_ZERO;
61
62 kq->dev = dev;
63 kq->nop_packet = nop.u32all;
64 switch (type) {
65 case KFD_QUEUE_TYPE_DIQ:
66 kq->mqd_mgr = dev->dqm->mqd_mgrs[KFD_MQD_TYPE_DIQ];
67 break;
68 case KFD_QUEUE_TYPE_HIQ:
69 kq->mqd_mgr = dev->dqm->mqd_mgrs[KFD_MQD_TYPE_HIQ];
70 break;
71 default:
72 dev_err(dev->adev->dev, "Invalid queue type %d\n", type);
73 return false;
74 }
75
76 if (!kq->mqd_mgr)
77 return false;
78
79 prop.doorbell_ptr = kfd_get_kernel_doorbell(dev->kfd, &prop.doorbell_off);
80
81 if (!prop.doorbell_ptr) {
82 dev_err(dev->adev->dev, "Failed to initialize doorbell");
83 goto err_get_kernel_doorbell;
84 }
85
86 retval = kfd_gtt_sa_allocate(dev, queue_size, &kq->pq);
87 if (retval != 0) {
88 dev_err(dev->adev->dev, "Failed to init pq queues size %d\n",
89 queue_size);
90 goto err_pq_allocate_vidmem;
91 }
92
93 kq->pq_kernel_addr = kq->pq->cpu_ptr;
94 kq->pq_gpu_addr = kq->pq->gpu_addr;
95
96 /* For CIK family asics, kq->eop_mem is not needed */
97 if (dev->adev->asic_type > CHIP_MULLINS) {
98 retval = kfd_gtt_sa_allocate(dev, PAGE_SIZE, &kq->eop_mem);
99 if (retval != 0)
100 goto err_eop_allocate_vidmem;
101
102 kq->eop_gpu_addr = kq->eop_mem->gpu_addr;
103 kq->eop_kernel_addr = kq->eop_mem->cpu_ptr;
104
105 memset(kq->eop_kernel_addr, 0, PAGE_SIZE);
106 }
107
108 retval = kfd_gtt_sa_allocate(dev, sizeof(*kq->rptr_kernel),
109 &kq->rptr_mem);
110
111 if (retval != 0)
112 goto err_rptr_allocate_vidmem;
113
114 kq->rptr_kernel = kq->rptr_mem->cpu_ptr;
115 kq->rptr_gpu_addr = kq->rptr_mem->gpu_addr;
116
117 retval = kfd_gtt_sa_allocate(dev, dev->kfd->device_info.doorbell_size,
118 &kq->wptr_mem);
119
120 if (retval != 0)
121 goto err_wptr_allocate_vidmem;
122
123 kq->wptr_kernel = kq->wptr_mem->cpu_ptr;
124 kq->wptr_gpu_addr = kq->wptr_mem->gpu_addr;
125
126 memset(kq->pq_kernel_addr, 0, queue_size);
127 memset(kq->rptr_kernel, 0, sizeof(*kq->rptr_kernel));
128 memset(kq->wptr_kernel, 0, dev->kfd->device_info.doorbell_size);
129
130 prop.queue_size = queue_size;
131 prop.is_interop = false;
132 prop.is_gws = false;
133 prop.priority = 1;
134 prop.queue_percent = 100;
135 prop.type = type;
136 prop.vmid = 0;
137 prop.queue_address = kq->pq_gpu_addr;
138 prop.read_ptr = (uint32_t *) kq->rptr_gpu_addr;
139 prop.write_ptr = (uint32_t *) kq->wptr_gpu_addr;
140 prop.eop_ring_buffer_address = kq->eop_gpu_addr;
141 prop.eop_ring_buffer_size = PAGE_SIZE;
142
143 if (init_queue(&kq->queue, &prop) != 0)
144 goto err_init_queue;
145
146 kq->queue->device = dev;
147 kq->queue->process = kfd_get_process(current);
148
149 kq->queue->mqd_mem_obj = kq->mqd_mgr->allocate_mqd(kq->mqd_mgr->dev,
150 &kq->queue->properties);
151 if (!kq->queue->mqd_mem_obj)
152 goto err_allocate_mqd;
153 kq->mqd_mgr->init_mqd(kq->mqd_mgr, &kq->queue->mqd,
154 kq->queue->mqd_mem_obj,
155 &kq->queue->gart_mqd_addr,
156 &kq->queue->properties);
157 /* assign HIQ to HQD */
158 if (type == KFD_QUEUE_TYPE_HIQ) {
159 pr_debug("Assigning hiq to hqd\n");
160 kq->queue->pipe = KFD_CIK_HIQ_PIPE;
161 kq->queue->queue = KFD_CIK_HIQ_QUEUE;
162 kq->mqd_mgr->load_mqd(kq->mqd_mgr, kq->queue->mqd,
163 kq->queue->pipe, kq->queue->queue,
164 &kq->queue->properties, NULL);
165 } else {
166 /* allocate fence for DIQ */
167
168 retval = kfd_gtt_sa_allocate(dev, sizeof(uint32_t),
169 &kq->fence_mem_obj);
170
171 if (retval != 0)
172 goto err_alloc_fence;
173
174 kq->fence_kernel_address = kq->fence_mem_obj->cpu_ptr;
175 kq->fence_gpu_addr = kq->fence_mem_obj->gpu_addr;
176 }
177
178 print_queue(kq->queue);
179
180 return true;
181err_alloc_fence:
182 kq->mqd_mgr->free_mqd(kq->mqd_mgr, kq->queue->mqd, kq->queue->mqd_mem_obj);
183err_allocate_mqd:
184 uninit_queue(kq->queue);
185err_init_queue:
186 kfd_gtt_sa_free(dev, kq->wptr_mem);
187err_wptr_allocate_vidmem:
188 kfd_gtt_sa_free(dev, kq->rptr_mem);
189err_rptr_allocate_vidmem:
190 kfd_gtt_sa_free(dev, kq->eop_mem);
191err_eop_allocate_vidmem:
192 kfd_gtt_sa_free(dev, kq->pq);
193err_pq_allocate_vidmem:
194 kfd_release_kernel_doorbell(dev->kfd, prop.doorbell_ptr);
195err_get_kernel_doorbell:
196 return false;
197
198}
199
200/* Uninitialize a kernel queue and free all its memory usages. */
201static void kq_uninitialize(struct kernel_queue *kq)
202{
203 if (kq->queue->properties.type == KFD_QUEUE_TYPE_HIQ && down_read_trylock(&kq->dev->adev->reset_domain->sem)) {
204 kq->mqd_mgr->destroy_mqd(kq->mqd_mgr,
205 kq->queue->mqd,
206 KFD_PREEMPT_TYPE_WAVEFRONT_RESET,
207 KFD_UNMAP_LATENCY_MS,
208 kq->queue->pipe,
209 kq->queue->queue);
210 up_read(&kq->dev->adev->reset_domain->sem);
211 }
212 else if (kq->queue->properties.type == KFD_QUEUE_TYPE_DIQ)
213 kfd_gtt_sa_free(kq->dev, kq->fence_mem_obj);
214
215 kq->mqd_mgr->free_mqd(kq->mqd_mgr, kq->queue->mqd,
216 kq->queue->mqd_mem_obj);
217
218 kfd_gtt_sa_free(kq->dev, kq->rptr_mem);
219 kfd_gtt_sa_free(kq->dev, kq->wptr_mem);
220
221 /* For CIK family asics, kq->eop_mem is Null, kfd_gtt_sa_free()
222 * is able to handle NULL properly.
223 */
224 kfd_gtt_sa_free(kq->dev, kq->eop_mem);
225
226 kfd_gtt_sa_free(kq->dev, kq->pq);
227 kfd_release_kernel_doorbell(kq->dev->kfd,
228 kq->queue->properties.doorbell_ptr);
229 uninit_queue(kq->queue);
230}
231
232int kq_acquire_packet_buffer(struct kernel_queue *kq,
233 size_t packet_size_in_dwords, unsigned int **buffer_ptr)
234{
235 size_t available_size;
236 size_t queue_size_dwords;
237 uint32_t wptr, rptr;
238 uint64_t wptr64;
239 unsigned int *queue_address;
240
241 /* When rptr == wptr, the buffer is empty.
242 * When rptr == wptr + 1, the buffer is full.
243 * It is always rptr that advances to the position of wptr, rather than
244 * the opposite. So we can only use up to queue_size_dwords - 1 dwords.
245 */
246 rptr = *kq->rptr_kernel;
247 wptr = kq->pending_wptr;
248 wptr64 = kq->pending_wptr64;
249 queue_address = (unsigned int *)kq->pq_kernel_addr;
250 queue_size_dwords = kq->queue->properties.queue_size / 4;
251
252 pr_debug("rptr: %d\n", rptr);
253 pr_debug("wptr: %d\n", wptr);
254 pr_debug("queue_address 0x%p\n", queue_address);
255
256 available_size = (rptr + queue_size_dwords - 1 - wptr) %
257 queue_size_dwords;
258
259 if (packet_size_in_dwords > available_size) {
260 /*
261 * make sure calling functions know
262 * acquire_packet_buffer() failed
263 */
264 goto err_no_space;
265 }
266
267 if (wptr + packet_size_in_dwords >= queue_size_dwords) {
268 /* make sure after rolling back to position 0, there is
269 * still enough space.
270 */
271 if (packet_size_in_dwords >= rptr)
272 goto err_no_space;
273
274 /* fill nops, roll back and start at position 0 */
275 while (wptr > 0) {
276 queue_address[wptr] = kq->nop_packet;
277 wptr = (wptr + 1) % queue_size_dwords;
278 wptr64++;
279 }
280 }
281
282 *buffer_ptr = &queue_address[wptr];
283 kq->pending_wptr = wptr + packet_size_in_dwords;
284 kq->pending_wptr64 = wptr64 + packet_size_in_dwords;
285
286 return 0;
287
288err_no_space:
289 *buffer_ptr = NULL;
290 return -ENOMEM;
291}
292
293int kq_submit_packet(struct kernel_queue *kq)
294{
295#ifdef DEBUG
296 int i;
297
298 for (i = *kq->wptr_kernel; i < kq->pending_wptr; i++) {
299 pr_debug("0x%2X ", kq->pq_kernel_addr[i]);
300 if (i % 15 == 0)
301 pr_debug("\n");
302 }
303 pr_debug("\n");
304#endif
305 /* Fatal err detected, packet submission won't go through */
306 if (amdgpu_amdkfd_is_fed(kq->dev->adev))
307 return -EIO;
308
309 /* Make sure ring buffer is updated before wptr updated */
310 mb();
311
312 if (kq->dev->kfd->device_info.doorbell_size == 8) {
313 *kq->wptr64_kernel = kq->pending_wptr64;
314 mb(); /* Make sure wptr updated before ring doorbell */
315 write_kernel_doorbell64(kq->queue->properties.doorbell_ptr,
316 kq->pending_wptr64);
317 } else {
318 *kq->wptr_kernel = kq->pending_wptr;
319 mb(); /* Make sure wptr updated before ring doorbell */
320 write_kernel_doorbell(kq->queue->properties.doorbell_ptr,
321 kq->pending_wptr);
322 }
323
324 return 0;
325}
326
327void kq_rollback_packet(struct kernel_queue *kq)
328{
329 if (kq->dev->kfd->device_info.doorbell_size == 8) {
330 kq->pending_wptr64 = *kq->wptr64_kernel;
331 kq->pending_wptr = *kq->wptr_kernel %
332 (kq->queue->properties.queue_size / 4);
333 } else {
334 kq->pending_wptr = *kq->wptr_kernel;
335 }
336}
337
338struct kernel_queue *kernel_queue_init(struct kfd_node *dev,
339 enum kfd_queue_type type)
340{
341 struct kernel_queue *kq;
342
343 kq = kzalloc(sizeof(*kq), GFP_KERNEL);
344 if (!kq)
345 return NULL;
346
347 if (kq_initialize(kq, dev, type, KFD_KERNEL_QUEUE_SIZE))
348 return kq;
349
350 dev_err(dev->adev->dev, "Failed to init kernel queue\n");
351
352 kfree(kq);
353 return NULL;
354}
355
356void kernel_queue_uninit(struct kernel_queue *kq)
357{
358 kq_uninitialize(kq);
359 kfree(kq);
360}
361
362/* FIXME: Can this test be removed? */
363static __attribute__((unused)) void test_kq(struct kfd_node *dev)
364{
365 struct kernel_queue *kq;
366 uint32_t *buffer, i;
367 int retval;
368
369 dev_err(dev->adev->dev, "Starting kernel queue test\n");
370
371 kq = kernel_queue_init(dev, KFD_QUEUE_TYPE_HIQ);
372 if (unlikely(!kq)) {
373 dev_err(dev->adev->dev, " Failed to initialize HIQ\n");
374 dev_err(dev->adev->dev, "Kernel queue test failed\n");
375 return;
376 }
377
378 retval = kq_acquire_packet_buffer(kq, 5, &buffer);
379 if (unlikely(retval != 0)) {
380 dev_err(dev->adev->dev, " Failed to acquire packet buffer\n");
381 dev_err(dev->adev->dev, "Kernel queue test failed\n");
382 return;
383 }
384 for (i = 0; i < 5; i++)
385 buffer[i] = kq->nop_packet;
386 kq_submit_packet(kq);
387
388 dev_err(dev->adev->dev, "Ending kernel queue test\n");
389}
390
391