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
36 #define PM4_COUNT_ZERO (((1 << 15) - 1) << 16)
37
38 /* Initialize a kernel queue, including allocations of GART memory
39 * needed for the queue.
40 */
kq_initialize(struct kernel_queue * kq,struct kfd_dev * dev,enum kfd_queue_type type,unsigned int queue_size)41 static bool kq_initialize(struct kernel_queue *kq, struct kfd_dev *dev,
42 enum kfd_queue_type type, unsigned int queue_size)
43 {
44 struct queue_properties prop;
45 int retval;
46 union PM4_MES_TYPE_3_HEADER nop;
47
48 if (WARN_ON(type != KFD_QUEUE_TYPE_DIQ && type != KFD_QUEUE_TYPE_HIQ))
49 return false;
50
51 pr_debug("Initializing queue type %d size %d\n", KFD_QUEUE_TYPE_HIQ,
52 queue_size);
53
54 memset(&prop, 0, sizeof(prop));
55 memset(&nop, 0, sizeof(nop));
56
57 nop.opcode = IT_NOP;
58 nop.type = PM4_TYPE_3;
59 nop.u32all |= PM4_COUNT_ZERO;
60
61 kq->dev = dev;
62 kq->nop_packet = nop.u32all;
63 switch (type) {
64 case KFD_QUEUE_TYPE_DIQ:
65 kq->mqd_mgr = dev->dqm->mqd_mgrs[KFD_MQD_TYPE_DIQ];
66 break;
67 case KFD_QUEUE_TYPE_HIQ:
68 kq->mqd_mgr = dev->dqm->mqd_mgrs[KFD_MQD_TYPE_HIQ];
69 break;
70 default:
71 pr_err("Invalid queue type %d\n", type);
72 return false;
73 }
74
75 if (!kq->mqd_mgr)
76 return false;
77
78 prop.doorbell_ptr = kfd_get_kernel_doorbell(dev, &prop.doorbell_off);
79
80 if (!prop.doorbell_ptr) {
81 pr_err("Failed to initialize doorbell");
82 goto err_get_kernel_doorbell;
83 }
84
85 retval = kfd_gtt_sa_allocate(dev, queue_size, &kq->pq);
86 if (retval != 0) {
87 pr_err("Failed to init pq queues size %d\n", queue_size);
88 goto err_pq_allocate_vidmem;
89 }
90
91 kq->pq_kernel_addr = kq->pq->cpu_ptr;
92 kq->pq_gpu_addr = kq->pq->gpu_addr;
93
94 /* For CIK family asics, kq->eop_mem is not needed */
95 if (dev->adev->asic_type > CHIP_MULLINS) {
96 retval = kfd_gtt_sa_allocate(dev, PAGE_SIZE, &kq->eop_mem);
97 if (retval != 0)
98 goto err_eop_allocate_vidmem;
99
100 kq->eop_gpu_addr = kq->eop_mem->gpu_addr;
101 kq->eop_kernel_addr = kq->eop_mem->cpu_ptr;
102
103 memset(kq->eop_kernel_addr, 0, PAGE_SIZE);
104 }
105
106 retval = kfd_gtt_sa_allocate(dev, sizeof(*kq->rptr_kernel),
107 &kq->rptr_mem);
108
109 if (retval != 0)
110 goto err_rptr_allocate_vidmem;
111
112 kq->rptr_kernel = kq->rptr_mem->cpu_ptr;
113 kq->rptr_gpu_addr = kq->rptr_mem->gpu_addr;
114
115 retval = kfd_gtt_sa_allocate(dev, dev->device_info.doorbell_size,
116 &kq->wptr_mem);
117
118 if (retval != 0)
119 goto err_wptr_allocate_vidmem;
120
121 kq->wptr_kernel = kq->wptr_mem->cpu_ptr;
122 kq->wptr_gpu_addr = kq->wptr_mem->gpu_addr;
123
124 memset(kq->pq_kernel_addr, 0, queue_size);
125 memset(kq->rptr_kernel, 0, sizeof(*kq->rptr_kernel));
126 memset(kq->wptr_kernel, 0, sizeof(*kq->wptr_kernel));
127
128 prop.queue_size = queue_size;
129 prop.is_interop = false;
130 prop.is_gws = false;
131 prop.priority = 1;
132 prop.queue_percent = 100;
133 prop.type = type;
134 prop.vmid = 0;
135 prop.queue_address = kq->pq_gpu_addr;
136 prop.read_ptr = (uint32_t *) kq->rptr_gpu_addr;
137 prop.write_ptr = (uint32_t *) kq->wptr_gpu_addr;
138 prop.eop_ring_buffer_address = kq->eop_gpu_addr;
139 prop.eop_ring_buffer_size = PAGE_SIZE;
140
141 if (init_queue(&kq->queue, &prop) != 0)
142 goto err_init_queue;
143
144 kq->queue->device = dev;
145 kq->queue->process = kfd_get_process(current);
146
147 kq->queue->mqd_mem_obj = kq->mqd_mgr->allocate_mqd(kq->mqd_mgr->dev,
148 &kq->queue->properties);
149 if (!kq->queue->mqd_mem_obj)
150 goto err_allocate_mqd;
151 kq->mqd_mgr->init_mqd(kq->mqd_mgr, &kq->queue->mqd,
152 kq->queue->mqd_mem_obj,
153 &kq->queue->gart_mqd_addr,
154 &kq->queue->properties);
155 /* assign HIQ to HQD */
156 if (type == KFD_QUEUE_TYPE_HIQ) {
157 pr_debug("Assigning hiq to hqd\n");
158 kq->queue->pipe = KFD_CIK_HIQ_PIPE;
159 kq->queue->queue = KFD_CIK_HIQ_QUEUE;
160 kq->mqd_mgr->load_mqd(kq->mqd_mgr, kq->queue->mqd,
161 kq->queue->pipe, kq->queue->queue,
162 &kq->queue->properties, NULL);
163 } else {
164 /* allocate fence for DIQ */
165
166 retval = kfd_gtt_sa_allocate(dev, sizeof(uint32_t),
167 &kq->fence_mem_obj);
168
169 if (retval != 0)
170 goto err_alloc_fence;
171
172 kq->fence_kernel_address = kq->fence_mem_obj->cpu_ptr;
173 kq->fence_gpu_addr = kq->fence_mem_obj->gpu_addr;
174 }
175
176 print_queue(kq->queue);
177
178 return true;
179 err_alloc_fence:
180 kq->mqd_mgr->free_mqd(kq->mqd_mgr, kq->queue->mqd, kq->queue->mqd_mem_obj);
181 err_allocate_mqd:
182 uninit_queue(kq->queue);
183 err_init_queue:
184 kfd_gtt_sa_free(dev, kq->wptr_mem);
185 err_wptr_allocate_vidmem:
186 kfd_gtt_sa_free(dev, kq->rptr_mem);
187 err_rptr_allocate_vidmem:
188 kfd_gtt_sa_free(dev, kq->eop_mem);
189 err_eop_allocate_vidmem:
190 kfd_gtt_sa_free(dev, kq->pq);
191 err_pq_allocate_vidmem:
192 kfd_release_kernel_doorbell(dev, prop.doorbell_ptr);
193 err_get_kernel_doorbell:
194 return false;
195
196 }
197
198 /* Uninitialize a kernel queue and free all its memory usages. */
kq_uninitialize(struct kernel_queue * kq,bool hanging)199 static void kq_uninitialize(struct kernel_queue *kq, bool hanging)
200 {
201 if (kq->queue->properties.type == KFD_QUEUE_TYPE_HIQ && !hanging)
202 kq->mqd_mgr->destroy_mqd(kq->mqd_mgr,
203 kq->queue->mqd,
204 KFD_PREEMPT_TYPE_WAVEFRONT_RESET,
205 KFD_UNMAP_LATENCY_MS,
206 kq->queue->pipe,
207 kq->queue->queue);
208 else if (kq->queue->properties.type == KFD_QUEUE_TYPE_DIQ)
209 kfd_gtt_sa_free(kq->dev, kq->fence_mem_obj);
210
211 kq->mqd_mgr->free_mqd(kq->mqd_mgr, kq->queue->mqd,
212 kq->queue->mqd_mem_obj);
213
214 kfd_gtt_sa_free(kq->dev, kq->rptr_mem);
215 kfd_gtt_sa_free(kq->dev, kq->wptr_mem);
216
217 /* For CIK family asics, kq->eop_mem is Null, kfd_gtt_sa_free()
218 * is able to handle NULL properly.
219 */
220 kfd_gtt_sa_free(kq->dev, kq->eop_mem);
221
222 kfd_gtt_sa_free(kq->dev, kq->pq);
223 kfd_release_kernel_doorbell(kq->dev,
224 kq->queue->properties.doorbell_ptr);
225 uninit_queue(kq->queue);
226 }
227
kq_acquire_packet_buffer(struct kernel_queue * kq,size_t packet_size_in_dwords,unsigned int ** buffer_ptr)228 int kq_acquire_packet_buffer(struct kernel_queue *kq,
229 size_t packet_size_in_dwords, unsigned int **buffer_ptr)
230 {
231 size_t available_size;
232 size_t queue_size_dwords;
233 uint32_t wptr, rptr;
234 uint64_t wptr64;
235 unsigned int *queue_address;
236
237 /* When rptr == wptr, the buffer is empty.
238 * When rptr == wptr + 1, the buffer is full.
239 * It is always rptr that advances to the position of wptr, rather than
240 * the opposite. So we can only use up to queue_size_dwords - 1 dwords.
241 */
242 rptr = *kq->rptr_kernel;
243 wptr = kq->pending_wptr;
244 wptr64 = kq->pending_wptr64;
245 queue_address = (unsigned int *)kq->pq_kernel_addr;
246 queue_size_dwords = kq->queue->properties.queue_size / 4;
247
248 pr_debug("rptr: %d\n", rptr);
249 pr_debug("wptr: %d\n", wptr);
250 pr_debug("queue_address 0x%p\n", queue_address);
251
252 available_size = (rptr + queue_size_dwords - 1 - wptr) %
253 queue_size_dwords;
254
255 if (packet_size_in_dwords > available_size) {
256 /*
257 * make sure calling functions know
258 * acquire_packet_buffer() failed
259 */
260 goto err_no_space;
261 }
262
263 if (wptr + packet_size_in_dwords >= queue_size_dwords) {
264 /* make sure after rolling back to position 0, there is
265 * still enough space.
266 */
267 if (packet_size_in_dwords >= rptr)
268 goto err_no_space;
269
270 /* fill nops, roll back and start at position 0 */
271 while (wptr > 0) {
272 queue_address[wptr] = kq->nop_packet;
273 wptr = (wptr + 1) % queue_size_dwords;
274 wptr64++;
275 }
276 }
277
278 *buffer_ptr = &queue_address[wptr];
279 kq->pending_wptr = wptr + packet_size_in_dwords;
280 kq->pending_wptr64 = wptr64 + packet_size_in_dwords;
281
282 return 0;
283
284 err_no_space:
285 *buffer_ptr = NULL;
286 return -ENOMEM;
287 }
288
kq_submit_packet(struct kernel_queue * kq)289 void kq_submit_packet(struct kernel_queue *kq)
290 {
291 #ifdef DEBUG
292 int i;
293
294 for (i = *kq->wptr_kernel; i < kq->pending_wptr; i++) {
295 pr_debug("0x%2X ", kq->pq_kernel_addr[i]);
296 if (i % 15 == 0)
297 pr_debug("\n");
298 }
299 pr_debug("\n");
300 #endif
301 if (kq->dev->device_info.doorbell_size == 8) {
302 *kq->wptr64_kernel = kq->pending_wptr64;
303 write_kernel_doorbell64(kq->queue->properties.doorbell_ptr,
304 kq->pending_wptr64);
305 } else {
306 *kq->wptr_kernel = kq->pending_wptr;
307 write_kernel_doorbell(kq->queue->properties.doorbell_ptr,
308 kq->pending_wptr);
309 }
310 }
311
kq_rollback_packet(struct kernel_queue * kq)312 void kq_rollback_packet(struct kernel_queue *kq)
313 {
314 if (kq->dev->device_info.doorbell_size == 8) {
315 kq->pending_wptr64 = *kq->wptr64_kernel;
316 kq->pending_wptr = *kq->wptr_kernel %
317 (kq->queue->properties.queue_size / 4);
318 } else {
319 kq->pending_wptr = *kq->wptr_kernel;
320 }
321 }
322
kernel_queue_init(struct kfd_dev * dev,enum kfd_queue_type type)323 struct kernel_queue *kernel_queue_init(struct kfd_dev *dev,
324 enum kfd_queue_type type)
325 {
326 struct kernel_queue *kq;
327
328 kq = kzalloc(sizeof(*kq), GFP_KERNEL);
329 if (!kq)
330 return NULL;
331
332 if (kq_initialize(kq, dev, type, KFD_KERNEL_QUEUE_SIZE))
333 return kq;
334
335 pr_err("Failed to init kernel queue\n");
336
337 kfree(kq);
338 return NULL;
339 }
340
kernel_queue_uninit(struct kernel_queue * kq,bool hanging)341 void kernel_queue_uninit(struct kernel_queue *kq, bool hanging)
342 {
343 kq_uninitialize(kq, hanging);
344 kfree(kq);
345 }
346
347 /* FIXME: Can this test be removed? */
test_kq(struct kfd_dev * dev)348 static __attribute__((unused)) void test_kq(struct kfd_dev *dev)
349 {
350 struct kernel_queue *kq;
351 uint32_t *buffer, i;
352 int retval;
353
354 pr_err("Starting kernel queue test\n");
355
356 kq = kernel_queue_init(dev, KFD_QUEUE_TYPE_HIQ);
357 if (unlikely(!kq)) {
358 pr_err(" Failed to initialize HIQ\n");
359 pr_err("Kernel queue test failed\n");
360 return;
361 }
362
363 retval = kq_acquire_packet_buffer(kq, 5, &buffer);
364 if (unlikely(retval != 0)) {
365 pr_err(" Failed to acquire packet buffer\n");
366 pr_err("Kernel queue test failed\n");
367 return;
368 }
369 for (i = 0; i < 5; i++)
370 buffer[i] = kq->nop_packet;
371 kq_submit_packet(kq);
372
373 pr_err("Ending kernel queue test\n");
374 }
375
376
377