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 | */ |
41 | static bool kq_initialize(struct kernel_queue *kq, struct kfd_node *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(kfd: dev->kfd, doorbell_off: &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(node: dev, size: queue_size, mem_obj: &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(node: dev, PAGE_SIZE, mem_obj: &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(node: dev, size: sizeof(*kq->rptr_kernel), |
107 | mem_obj: &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(node: dev, size: dev->kfd->device_info.doorbell_size, |
116 | mem_obj: &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(q: &kq->queue, properties: &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(node: dev, size: sizeof(uint32_t), |
167 | mem_obj: &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(q: 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(q: kq->queue); |
183 | err_init_queue: |
184 | kfd_gtt_sa_free(node: dev, mem_obj: kq->wptr_mem); |
185 | err_wptr_allocate_vidmem: |
186 | kfd_gtt_sa_free(node: dev, mem_obj: kq->rptr_mem); |
187 | err_rptr_allocate_vidmem: |
188 | kfd_gtt_sa_free(node: dev, mem_obj: kq->eop_mem); |
189 | err_eop_allocate_vidmem: |
190 | kfd_gtt_sa_free(node: dev, mem_obj: kq->pq); |
191 | err_pq_allocate_vidmem: |
192 | kfd_release_kernel_doorbell(kfd: dev->kfd, db_addr: 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. */ |
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(node: kq->dev, mem_obj: 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(node: kq->dev, mem_obj: kq->rptr_mem); |
215 | kfd_gtt_sa_free(node: kq->dev, mem_obj: 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(node: kq->dev, mem_obj: kq->eop_mem); |
221 | |
222 | kfd_gtt_sa_free(node: kq->dev, mem_obj: kq->pq); |
223 | kfd_release_kernel_doorbell(kfd: kq->dev->kfd, |
224 | db_addr: kq->queue->properties.doorbell_ptr); |
225 | uninit_queue(q: kq->queue); |
226 | } |
227 | |
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 | |
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->kfd->device_info.doorbell_size == 8) { |
302 | *kq->wptr64_kernel = kq->pending_wptr64; |
303 | write_kernel_doorbell64(db: kq->queue->properties.doorbell_ptr, |
304 | value: kq->pending_wptr64); |
305 | } else { |
306 | *kq->wptr_kernel = kq->pending_wptr; |
307 | write_kernel_doorbell(db: kq->queue->properties.doorbell_ptr, |
308 | value: kq->pending_wptr); |
309 | } |
310 | } |
311 | |
312 | void kq_rollback_packet(struct kernel_queue *kq) |
313 | { |
314 | if (kq->dev->kfd->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 | |
323 | struct kernel_queue *kernel_queue_init(struct kfd_node *dev, |
324 | enum kfd_queue_type type) |
325 | { |
326 | struct kernel_queue *kq; |
327 | |
328 | kq = kzalloc(size: 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(objp: kq); |
338 | return NULL; |
339 | } |
340 | |
341 | void kernel_queue_uninit(struct kernel_queue *kq, bool hanging) |
342 | { |
343 | kq_uninitialize(kq, hanging); |
344 | kfree(objp: kq); |
345 | } |
346 | |
347 | /* FIXME: Can this test be removed? */ |
348 | static __attribute__((unused)) void test_kq(struct kfd_node *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, type: 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, packet_size_in_dwords: 5, buffer_ptr: &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 | |