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 */ 42 static 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 pr_debug("Initializing queue type %d size %d\n", type, queue_size); 50 51 memset(&prop, 0, sizeof(prop)); 52 memset(&nop, 0, sizeof(nop)); 53 54 nop.opcode = IT_NOP; 55 nop.type = PM4_TYPE_3; 56 nop.u32all |= PM4_COUNT_ZERO; 57 58 kq->dev = dev; 59 kq->nop_packet = nop.u32all; 60 switch (type) { 61 case KFD_QUEUE_TYPE_DIQ: 62 kq->mqd_mgr = dev->dqm->mqd_mgrs[KFD_MQD_TYPE_DIQ]; 63 break; 64 case KFD_QUEUE_TYPE_HIQ: 65 kq->mqd_mgr = dev->dqm->mqd_mgrs[KFD_MQD_TYPE_HIQ]; 66 break; 67 default: 68 WARN(1, "Invalid queue type %d\n", type); 69 dev_err(dev->adev->dev, "Invalid queue type %d\n", type); 70 return false; 71 } 72 73 if (!kq->mqd_mgr) 74 return false; 75 76 prop.doorbell_ptr = kfd_get_kernel_doorbell(dev->kfd, &prop.doorbell_off); 77 78 if (!prop.doorbell_ptr) { 79 dev_err(dev->adev->dev, "Failed to initialize doorbell"); 80 goto err_get_kernel_doorbell; 81 } 82 83 retval = kfd_gtt_sa_allocate(dev, queue_size, &kq->pq); 84 if (retval != 0) { 85 dev_err(dev->adev->dev, "Failed to init pq queues size %d\n", 86 queue_size); 87 goto err_pq_allocate_vidmem; 88 } 89 90 kq->pq_kernel_addr = kq->pq->cpu_ptr; 91 kq->pq_gpu_addr = kq->pq->gpu_addr; 92 93 /* For CIK family asics, kq->eop_mem is not needed */ 94 if (dev->adev->asic_type > CHIP_MULLINS) { 95 retval = kfd_gtt_sa_allocate(dev, PAGE_SIZE, &kq->eop_mem); 96 if (retval != 0) 97 goto err_eop_allocate_vidmem; 98 99 kq->eop_gpu_addr = kq->eop_mem->gpu_addr; 100 kq->eop_kernel_addr = kq->eop_mem->cpu_ptr; 101 102 memset(kq->eop_kernel_addr, 0, PAGE_SIZE); 103 } 104 105 retval = kfd_gtt_sa_allocate(dev, sizeof(*kq->rptr_kernel), 106 &kq->rptr_mem); 107 108 if (retval != 0) 109 goto err_rptr_allocate_vidmem; 110 111 kq->rptr_kernel = kq->rptr_mem->cpu_ptr; 112 kq->rptr_gpu_addr = kq->rptr_mem->gpu_addr; 113 114 retval = kfd_gtt_sa_allocate(dev, dev->kfd->device_info.doorbell_size, 115 &kq->wptr_mem); 116 117 if (retval != 0) 118 goto err_wptr_allocate_vidmem; 119 120 kq->wptr_kernel = kq->wptr_mem->cpu_ptr; 121 kq->wptr_gpu_addr = kq->wptr_mem->gpu_addr; 122 123 memset(kq->pq_kernel_addr, 0, queue_size); 124 memset(kq->rptr_kernel, 0, sizeof(*kq->rptr_kernel)); 125 memset(kq->wptr_kernel, 0, dev->kfd->device_info.doorbell_size); 126 127 prop.queue_size = queue_size; 128 prop.is_interop = false; 129 prop.is_gws = false; 130 prop.priority = 1; 131 prop.queue_percent = 100; 132 prop.type = type; 133 prop.vmid = 0; 134 prop.queue_address = kq->pq_gpu_addr; 135 prop.read_ptr = (uint32_t *) kq->rptr_gpu_addr; 136 prop.write_ptr = (uint32_t *) kq->wptr_gpu_addr; 137 prop.eop_ring_buffer_address = kq->eop_gpu_addr; 138 prop.eop_ring_buffer_size = PAGE_SIZE; 139 140 if (init_queue(&kq->queue, &prop) != 0) 141 goto err_init_queue; 142 143 kq->queue->device = dev; 144 kq->queue->process = kfd_get_process(current); 145 146 kq->queue->mqd_mem_obj = kq->mqd_mgr->allocate_mqd(kq->mqd_mgr->dev, 147 &kq->queue->properties); 148 if (!kq->queue->mqd_mem_obj) 149 goto err_allocate_mqd; 150 kq->mqd_mgr->init_mqd(kq->mqd_mgr, &kq->queue->mqd, 151 kq->queue->mqd_mem_obj, 152 &kq->queue->gart_mqd_addr, 153 &kq->queue->properties); 154 /* assign HIQ to HQD */ 155 if (type == KFD_QUEUE_TYPE_HIQ) { 156 pr_debug("Assigning hiq to hqd\n"); 157 kq->queue->pipe = KFD_CIK_HIQ_PIPE; 158 kq->queue->queue = KFD_CIK_HIQ_QUEUE; 159 kq->mqd_mgr->load_mqd(kq->mqd_mgr, kq->queue->mqd, 160 kq->queue->pipe, kq->queue->queue, 161 &kq->queue->properties, NULL); 162 } else { 163 /* allocate fence for DIQ */ 164 165 retval = kfd_gtt_sa_allocate(dev, sizeof(uint32_t), 166 &kq->fence_mem_obj); 167 168 if (retval != 0) 169 goto err_alloc_fence; 170 171 kq->fence_kernel_address = kq->fence_mem_obj->cpu_ptr; 172 kq->fence_gpu_addr = kq->fence_mem_obj->gpu_addr; 173 } 174 175 print_queue(kq->queue); 176 177 return true; 178 err_alloc_fence: 179 kq->mqd_mgr->free_mqd(kq->mqd_mgr, kq->queue->mqd, kq->queue->mqd_mem_obj); 180 err_allocate_mqd: 181 uninit_queue(kq->queue); 182 err_init_queue: 183 kfd_gtt_sa_free(dev, kq->wptr_mem); 184 err_wptr_allocate_vidmem: 185 kfd_gtt_sa_free(dev, kq->rptr_mem); 186 err_rptr_allocate_vidmem: 187 kfd_gtt_sa_free(dev, kq->eop_mem); 188 err_eop_allocate_vidmem: 189 kfd_gtt_sa_free(dev, kq->pq); 190 err_pq_allocate_vidmem: 191 kfd_release_kernel_doorbell(dev->kfd, prop.doorbell_ptr); 192 err_get_kernel_doorbell: 193 return false; 194 195 } 196 197 /* Uninitialize a kernel queue and free all its memory usages. */ 198 static void kq_uninitialize(struct kernel_queue *kq) 199 { 200 if (kq->queue->properties.type == KFD_QUEUE_TYPE_HIQ && down_read_trylock(&kq->dev->adev->reset_domain->sem)) { 201 kq->mqd_mgr->destroy_mqd(kq->mqd_mgr, 202 kq->queue->mqd, 203 KFD_PREEMPT_TYPE_WAVEFRONT_RESET, 204 KFD_UNMAP_LATENCY_MS, 205 kq->queue->pipe, 206 kq->queue->queue); 207 up_read(&kq->dev->adev->reset_domain->sem); 208 } 209 else if (kq->queue->properties.type == KFD_QUEUE_TYPE_DIQ) 210 kfd_gtt_sa_free(kq->dev, kq->fence_mem_obj); 211 212 kq->mqd_mgr->free_mqd(kq->mqd_mgr, kq->queue->mqd, 213 kq->queue->mqd_mem_obj); 214 215 kfd_gtt_sa_free(kq->dev, kq->rptr_mem); 216 kfd_gtt_sa_free(kq->dev, kq->wptr_mem); 217 218 /* For CIK family asics, kq->eop_mem is Null, kfd_gtt_sa_free() 219 * is able to handle NULL properly. 220 */ 221 kfd_gtt_sa_free(kq->dev, kq->eop_mem); 222 223 kfd_gtt_sa_free(kq->dev, kq->pq); 224 kfd_release_kernel_doorbell(kq->dev->kfd, 225 kq->queue->properties.doorbell_ptr); 226 uninit_queue(kq->queue); 227 } 228 229 int kq_acquire_packet_buffer(struct kernel_queue *kq, 230 size_t packet_size_in_dwords, unsigned int **buffer_ptr) 231 { 232 size_t available_size; 233 size_t queue_size_dwords; 234 uint32_t wptr, rptr; 235 uint64_t wptr64; 236 unsigned int *queue_address; 237 238 /* When rptr == wptr, the buffer is empty. 239 * When rptr == wptr + 1, the buffer is full. 240 * It is always rptr that advances to the position of wptr, rather than 241 * the opposite. So we can only use up to queue_size_dwords - 1 dwords. 242 */ 243 rptr = *kq->rptr_kernel; 244 wptr = kq->pending_wptr; 245 wptr64 = kq->pending_wptr64; 246 queue_address = (unsigned int *)kq->pq_kernel_addr; 247 queue_size_dwords = kq->queue->properties.queue_size / 4; 248 249 pr_debug("rptr: %d\n", rptr); 250 pr_debug("wptr: %d\n", wptr); 251 pr_debug("queue_address 0x%p\n", queue_address); 252 253 available_size = (rptr + queue_size_dwords - 1 - wptr) % 254 queue_size_dwords; 255 256 if (packet_size_in_dwords > available_size) { 257 /* 258 * make sure calling functions know 259 * acquire_packet_buffer() failed 260 */ 261 goto err_no_space; 262 } 263 264 if (wptr + packet_size_in_dwords >= queue_size_dwords) { 265 /* make sure after rolling back to position 0, there is 266 * still enough space. 267 */ 268 if (packet_size_in_dwords >= rptr) 269 goto err_no_space; 270 271 /* fill nops, roll back and start at position 0 */ 272 while (wptr > 0) { 273 queue_address[wptr] = kq->nop_packet; 274 wptr = (wptr + 1) % queue_size_dwords; 275 wptr64++; 276 } 277 } 278 279 *buffer_ptr = &queue_address[wptr]; 280 kq->pending_wptr = wptr + packet_size_in_dwords; 281 kq->pending_wptr64 = wptr64 + packet_size_in_dwords; 282 283 return 0; 284 285 err_no_space: 286 *buffer_ptr = NULL; 287 return -ENOMEM; 288 } 289 290 int kq_submit_packet(struct kernel_queue *kq) 291 { 292 #ifdef DEBUG 293 int i; 294 295 for (i = *kq->wptr_kernel; i < kq->pending_wptr; i++) { 296 pr_debug("0x%2X ", kq->pq_kernel_addr[i]); 297 if (i % 15 == 0) 298 pr_debug("\n"); 299 } 300 pr_debug("\n"); 301 #endif 302 /* Fatal err detected, packet submission won't go through */ 303 if (amdgpu_amdkfd_is_fed(kq->dev->adev)) 304 return -EIO; 305 306 /* Make sure ring buffer is updated before wptr updated */ 307 mb(); 308 309 if (kq->dev->kfd->device_info.doorbell_size == 8) { 310 *kq->wptr64_kernel = kq->pending_wptr64; 311 mb(); /* Make sure wptr updated before ring doorbell */ 312 write_kernel_doorbell64(kq->queue->properties.doorbell_ptr, 313 kq->pending_wptr64); 314 } else { 315 *kq->wptr_kernel = kq->pending_wptr; 316 mb(); /* Make sure wptr updated before ring doorbell */ 317 write_kernel_doorbell(kq->queue->properties.doorbell_ptr, 318 kq->pending_wptr); 319 } 320 321 return 0; 322 } 323 324 void kq_rollback_packet(struct kernel_queue *kq) 325 { 326 if (kq->dev->kfd->device_info.doorbell_size == 8) { 327 kq->pending_wptr64 = *kq->wptr64_kernel; 328 kq->pending_wptr = *kq->wptr_kernel % 329 (kq->queue->properties.queue_size / 4); 330 } else { 331 kq->pending_wptr = *kq->wptr_kernel; 332 } 333 } 334 335 struct kernel_queue *kernel_queue_init(struct kfd_node *dev, 336 enum kfd_queue_type type) 337 { 338 struct kernel_queue *kq; 339 340 kq = kzalloc(sizeof(*kq), GFP_KERNEL); 341 if (!kq) 342 return NULL; 343 344 if (kq_initialize(kq, dev, type, KFD_KERNEL_QUEUE_SIZE)) 345 return kq; 346 347 dev_err(dev->adev->dev, "Failed to init kernel queue\n"); 348 349 kfree(kq); 350 return NULL; 351 } 352 353 void kernel_queue_uninit(struct kernel_queue *kq) 354 { 355 kq_uninitialize(kq); 356 kfree(kq); 357 } 358 359 /* FIXME: Can this test be removed? */ 360 static __attribute__((unused)) void test_kq(struct kfd_node *dev) 361 { 362 struct kernel_queue *kq; 363 uint32_t *buffer, i; 364 int retval; 365 366 dev_err(dev->adev->dev, "Starting kernel queue test\n"); 367 368 kq = kernel_queue_init(dev, KFD_QUEUE_TYPE_HIQ); 369 if (unlikely(!kq)) { 370 dev_err(dev->adev->dev, " Failed to initialize HIQ\n"); 371 dev_err(dev->adev->dev, "Kernel queue test failed\n"); 372 return; 373 } 374 375 retval = kq_acquire_packet_buffer(kq, 5, &buffer); 376 if (unlikely(retval != 0)) { 377 dev_err(dev->adev->dev, " Failed to acquire packet buffer\n"); 378 dev_err(dev->adev->dev, "Kernel queue test failed\n"); 379 return; 380 } 381 for (i = 0; i < 5; i++) 382 buffer[i] = kq->nop_packet; 383 kq_submit_packet(kq); 384 385 dev_err(dev->adev->dev, "Ending kernel queue test\n"); 386 } 387 388 389