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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 | ||
24 | #include <linux/types.h> | |
25 | #include <linux/mutex.h> | |
26 | #include <linux/slab.h> | |
27 | #include <linux/printk.h> | |
28 | #include "kfd_kernel_queue.h" | |
29 | #include "kfd_priv.h" | |
30 | #include "kfd_device_queue_manager.h" | |
31 | #include "kfd_pm4_headers.h" | |
32 | #include "kfd_pm4_opcodes.h" | |
33 | ||
34 | #define PM4_COUNT_ZERO (((1 << 15) - 1) << 16) | |
35 | ||
36 | static bool initialize(struct kernel_queue *kq, struct kfd_dev *dev, | |
37 | enum kfd_queue_type type, unsigned int queue_size) | |
38 | { | |
39 | struct queue_properties prop; | |
40 | int retval; | |
41 | union PM4_MES_TYPE_3_HEADER nop; | |
42 | ||
43 | BUG_ON(!kq || !dev); | |
44 | BUG_ON(type != KFD_QUEUE_TYPE_DIQ && type != KFD_QUEUE_TYPE_HIQ); | |
45 | ||
46 | pr_debug("kfd: In func %s initializing queue type %d size %d\n", | |
47 | __func__, KFD_QUEUE_TYPE_HIQ, queue_size); | |
48 | ||
49 | nop.opcode = IT_NOP; | |
50 | nop.type = PM4_TYPE_3; | |
51 | nop.u32all |= PM4_COUNT_ZERO; | |
52 | ||
53 | kq->dev = dev; | |
54 | kq->nop_packet = nop.u32all; | |
55 | switch (type) { | |
56 | case KFD_QUEUE_TYPE_DIQ: | |
57 | case KFD_QUEUE_TYPE_HIQ: | |
58 | kq->mqd = dev->dqm->get_mqd_manager(dev->dqm, | |
59 | KFD_MQD_TYPE_CIK_HIQ); | |
60 | break; | |
61 | default: | |
62 | BUG(); | |
63 | break; | |
64 | } | |
65 | ||
66 | if (kq->mqd == NULL) | |
67 | return false; | |
68 | ||
5cd78de5 | 69 | prop.doorbell_ptr = kfd_get_kernel_doorbell(dev, &prop.doorbell_off); |
ed6e6a34 BG |
70 | |
71 | if (prop.doorbell_ptr == NULL) | |
72 | goto err_get_kernel_doorbell; | |
73 | ||
74 | retval = kfd2kgd->allocate_mem(dev->kgd, | |
75 | queue_size, | |
76 | PAGE_SIZE, | |
77 | KFD_MEMPOOL_SYSTEM_WRITECOMBINE, | |
78 | (struct kgd_mem **) &kq->pq); | |
79 | ||
80 | if (retval != 0) | |
81 | goto err_pq_allocate_vidmem; | |
82 | ||
83 | kq->pq_kernel_addr = kq->pq->cpu_ptr; | |
84 | kq->pq_gpu_addr = kq->pq->gpu_addr; | |
85 | ||
86 | retval = kfd2kgd->allocate_mem(dev->kgd, | |
87 | sizeof(*kq->rptr_kernel), | |
88 | 32, | |
89 | KFD_MEMPOOL_SYSTEM_WRITECOMBINE, | |
90 | (struct kgd_mem **) &kq->rptr_mem); | |
91 | ||
92 | if (retval != 0) | |
93 | goto err_rptr_allocate_vidmem; | |
94 | ||
95 | kq->rptr_kernel = kq->rptr_mem->cpu_ptr; | |
96 | kq->rptr_gpu_addr = kq->rptr_mem->gpu_addr; | |
97 | ||
98 | retval = kfd2kgd->allocate_mem(dev->kgd, | |
99 | sizeof(*kq->wptr_kernel), | |
100 | 32, | |
101 | KFD_MEMPOOL_SYSTEM_WRITECOMBINE, | |
102 | (struct kgd_mem **) &kq->wptr_mem); | |
103 | ||
104 | if (retval != 0) | |
105 | goto err_wptr_allocate_vidmem; | |
106 | ||
107 | kq->wptr_kernel = kq->wptr_mem->cpu_ptr; | |
108 | kq->wptr_gpu_addr = kq->wptr_mem->gpu_addr; | |
109 | ||
110 | memset(kq->pq_kernel_addr, 0, queue_size); | |
111 | memset(kq->rptr_kernel, 0, sizeof(*kq->rptr_kernel)); | |
112 | memset(kq->wptr_kernel, 0, sizeof(*kq->wptr_kernel)); | |
113 | ||
114 | prop.queue_size = queue_size; | |
115 | prop.is_interop = false; | |
116 | prop.priority = 1; | |
117 | prop.queue_percent = 100; | |
118 | prop.type = type; | |
119 | prop.vmid = 0; | |
120 | prop.queue_address = kq->pq_gpu_addr; | |
121 | prop.read_ptr = (uint32_t *) kq->rptr_gpu_addr; | |
122 | prop.write_ptr = (uint32_t *) kq->wptr_gpu_addr; | |
123 | ||
124 | if (init_queue(&kq->queue, prop) != 0) | |
125 | goto err_init_queue; | |
126 | ||
127 | kq->queue->device = dev; | |
128 | kq->queue->process = kfd_get_process(current); | |
129 | ||
130 | retval = kq->mqd->init_mqd(kq->mqd, &kq->queue->mqd, | |
131 | &kq->queue->mqd_mem_obj, | |
132 | &kq->queue->gart_mqd_addr, | |
133 | &kq->queue->properties); | |
134 | if (retval != 0) | |
135 | goto err_init_mqd; | |
136 | ||
137 | /* assign HIQ to HQD */ | |
138 | if (type == KFD_QUEUE_TYPE_HIQ) { | |
139 | pr_debug("assigning hiq to hqd\n"); | |
140 | kq->queue->pipe = KFD_CIK_HIQ_PIPE; | |
141 | kq->queue->queue = KFD_CIK_HIQ_QUEUE; | |
142 | kq->mqd->load_mqd(kq->mqd, kq->queue->mqd, kq->queue->pipe, | |
143 | kq->queue->queue, NULL); | |
144 | } else { | |
145 | /* allocate fence for DIQ */ | |
146 | ||
147 | retval = kfd2kgd->allocate_mem(dev->kgd, | |
148 | sizeof(uint32_t), | |
149 | 32, | |
150 | KFD_MEMPOOL_SYSTEM_WRITECOMBINE, | |
151 | (struct kgd_mem **) &kq->fence_mem_obj); | |
152 | ||
153 | if (retval != 0) | |
154 | goto err_alloc_fence; | |
155 | ||
156 | kq->fence_kernel_address = kq->fence_mem_obj->cpu_ptr; | |
157 | kq->fence_gpu_addr = kq->fence_mem_obj->gpu_addr; | |
158 | } | |
159 | ||
160 | print_queue(kq->queue); | |
161 | ||
162 | return true; | |
163 | err_alloc_fence: | |
164 | err_init_mqd: | |
165 | uninit_queue(kq->queue); | |
166 | err_init_queue: | |
167 | kfd2kgd->free_mem(dev->kgd, (struct kgd_mem *) kq->wptr_mem); | |
168 | err_wptr_allocate_vidmem: | |
169 | kfd2kgd->free_mem(dev->kgd, (struct kgd_mem *) kq->rptr_mem); | |
170 | err_rptr_allocate_vidmem: | |
171 | kfd2kgd->free_mem(dev->kgd, (struct kgd_mem *) kq->pq); | |
172 | err_pq_allocate_vidmem: | |
173 | pr_err("kfd: error init pq\n"); | |
5cd78de5 | 174 | kfd_release_kernel_doorbell(dev, prop.doorbell_ptr); |
ed6e6a34 BG |
175 | err_get_kernel_doorbell: |
176 | pr_err("kfd: error init doorbell"); | |
177 | return false; | |
178 | ||
179 | } | |
180 | ||
181 | static void uninitialize(struct kernel_queue *kq) | |
182 | { | |
183 | BUG_ON(!kq); | |
184 | ||
185 | if (kq->queue->properties.type == KFD_QUEUE_TYPE_HIQ) | |
186 | kq->mqd->destroy_mqd(kq->mqd, | |
187 | NULL, | |
188 | false, | |
189 | QUEUE_PREEMPT_DEFAULT_TIMEOUT_MS, | |
190 | kq->queue->pipe, | |
191 | kq->queue->queue); | |
192 | ||
193 | kfd2kgd->free_mem(kq->dev->kgd, (struct kgd_mem *) kq->rptr_mem); | |
194 | kfd2kgd->free_mem(kq->dev->kgd, (struct kgd_mem *) kq->wptr_mem); | |
195 | kfd2kgd->free_mem(kq->dev->kgd, (struct kgd_mem *) kq->pq); | |
196 | kfd_release_kernel_doorbell(kq->dev, | |
5cd78de5 | 197 | kq->queue->properties.doorbell_ptr); |
ed6e6a34 BG |
198 | uninit_queue(kq->queue); |
199 | } | |
200 | ||
201 | static int acquire_packet_buffer(struct kernel_queue *kq, | |
202 | size_t packet_size_in_dwords, unsigned int **buffer_ptr) | |
203 | { | |
204 | size_t available_size; | |
205 | size_t queue_size_dwords; | |
206 | uint32_t wptr, rptr; | |
207 | unsigned int *queue_address; | |
208 | ||
209 | BUG_ON(!kq || !buffer_ptr); | |
210 | ||
211 | rptr = *kq->rptr_kernel; | |
212 | wptr = *kq->wptr_kernel; | |
213 | queue_address = (unsigned int *)kq->pq_kernel_addr; | |
214 | queue_size_dwords = kq->queue->properties.queue_size / sizeof(uint32_t); | |
215 | ||
216 | pr_debug("kfd: In func %s\nrptr: %d\nwptr: %d\nqueue_address 0x%p\n", | |
217 | __func__, rptr, wptr, queue_address); | |
218 | ||
219 | available_size = (rptr - 1 - wptr + queue_size_dwords) % | |
220 | queue_size_dwords; | |
221 | ||
222 | if (packet_size_in_dwords >= queue_size_dwords || | |
223 | packet_size_in_dwords >= available_size) | |
224 | return -ENOMEM; | |
225 | ||
226 | if (wptr + packet_size_in_dwords >= queue_size_dwords) { | |
227 | while (wptr > 0) { | |
228 | queue_address[wptr] = kq->nop_packet; | |
229 | wptr = (wptr + 1) % queue_size_dwords; | |
230 | } | |
231 | } | |
232 | ||
233 | *buffer_ptr = &queue_address[wptr]; | |
234 | kq->pending_wptr = wptr + packet_size_in_dwords; | |
235 | ||
236 | return 0; | |
237 | } | |
238 | ||
239 | static void submit_packet(struct kernel_queue *kq) | |
240 | { | |
241 | #ifdef DEBUG | |
242 | int i; | |
243 | #endif | |
244 | ||
245 | BUG_ON(!kq); | |
246 | ||
247 | #ifdef DEBUG | |
248 | for (i = *kq->wptr_kernel; i < kq->pending_wptr; i++) { | |
249 | pr_debug("0x%2X ", kq->pq_kernel_addr[i]); | |
250 | if (i % 15 == 0) | |
251 | pr_debug("\n"); | |
252 | } | |
253 | pr_debug("\n"); | |
254 | #endif | |
255 | ||
256 | *kq->wptr_kernel = kq->pending_wptr; | |
5cd78de5 | 257 | write_kernel_doorbell(kq->queue->properties.doorbell_ptr, |
ed6e6a34 BG |
258 | kq->pending_wptr); |
259 | } | |
260 | ||
261 | static int sync_with_hw(struct kernel_queue *kq, unsigned long timeout_ms) | |
262 | { | |
263 | unsigned long org_timeout_ms; | |
264 | ||
265 | BUG_ON(!kq); | |
266 | ||
267 | org_timeout_ms = timeout_ms; | |
268 | timeout_ms += jiffies * 1000 / HZ; | |
269 | while (*kq->wptr_kernel != *kq->rptr_kernel) { | |
270 | if (time_after(jiffies * 1000 / HZ, timeout_ms)) { | |
271 | pr_err("kfd: kernel_queue %s timeout expired %lu\n", | |
272 | __func__, org_timeout_ms); | |
273 | pr_err("kfd: wptr: %d rptr: %d\n", | |
274 | *kq->wptr_kernel, *kq->rptr_kernel); | |
275 | return -ETIME; | |
276 | } | |
277 | cpu_relax(); | |
278 | } | |
279 | ||
280 | return 0; | |
281 | } | |
282 | ||
283 | static void rollback_packet(struct kernel_queue *kq) | |
284 | { | |
285 | BUG_ON(!kq); | |
286 | kq->pending_wptr = *kq->queue->properties.write_ptr; | |
287 | } | |
288 | ||
289 | struct kernel_queue *kernel_queue_init(struct kfd_dev *dev, | |
290 | enum kfd_queue_type type) | |
291 | { | |
292 | struct kernel_queue *kq; | |
293 | ||
294 | BUG_ON(!dev); | |
295 | ||
296 | kq = kzalloc(sizeof(struct kernel_queue), GFP_KERNEL); | |
297 | if (!kq) | |
298 | return NULL; | |
299 | ||
300 | kq->initialize = initialize; | |
301 | kq->uninitialize = uninitialize; | |
302 | kq->acquire_packet_buffer = acquire_packet_buffer; | |
303 | kq->submit_packet = submit_packet; | |
304 | kq->sync_with_hw = sync_with_hw; | |
305 | kq->rollback_packet = rollback_packet; | |
306 | ||
307 | if (kq->initialize(kq, dev, type, KFD_KERNEL_QUEUE_SIZE) == false) { | |
308 | pr_err("kfd: failed to init kernel queue\n"); | |
309 | kfree(kq); | |
310 | return NULL; | |
311 | } | |
312 | return kq; | |
313 | } | |
314 | ||
315 | void kernel_queue_uninit(struct kernel_queue *kq) | |
316 | { | |
317 | BUG_ON(!kq); | |
318 | ||
319 | kq->uninitialize(kq); | |
320 | kfree(kq); | |
321 | } | |
322 | ||
5ef360ea | 323 | static __attribute__((unused)) void test_kq(struct kfd_dev *dev) |
ed6e6a34 BG |
324 | { |
325 | struct kernel_queue *kq; | |
326 | uint32_t *buffer, i; | |
327 | int retval; | |
328 | ||
329 | BUG_ON(!dev); | |
330 | ||
331 | pr_debug("kfd: starting kernel queue test\n"); | |
332 | ||
333 | kq = kernel_queue_init(dev, KFD_QUEUE_TYPE_HIQ); | |
334 | BUG_ON(!kq); | |
335 | ||
336 | retval = kq->acquire_packet_buffer(kq, 5, &buffer); | |
337 | BUG_ON(retval != 0); | |
338 | for (i = 0; i < 5; i++) | |
339 | buffer[i] = kq->nop_packet; | |
340 | kq->submit_packet(kq); | |
341 | kq->sync_with_hw(kq, 1000); | |
342 | ||
343 | pr_debug("kfd: ending kernel queue test\n"); | |
344 | } | |
345 | ||
346 |