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 <linux/sched.h> 29 #include "kfd_kernel_queue.h" 30 #include "kfd_priv.h" 31 #include "kfd_device_queue_manager.h" 32 #include "kfd_pm4_headers.h" 33 #include "kfd_pm4_opcodes.h" 34 35 #define PM4_COUNT_ZERO (((1 << 15) - 1) << 16) 36 37 static bool initialize(struct kernel_queue *kq, struct kfd_dev *dev, 38 enum kfd_queue_type type, unsigned int queue_size) 39 { 40 struct queue_properties prop; 41 int retval; 42 union PM4_MES_TYPE_3_HEADER nop; 43 44 if (WARN_ON(type != KFD_QUEUE_TYPE_DIQ && type != KFD_QUEUE_TYPE_HIQ)) 45 return false; 46 47 pr_debug("Initializing queue type %d size %d\n", KFD_QUEUE_TYPE_HIQ, 48 queue_size); 49 50 memset(&prop, 0, sizeof(prop)); 51 memset(&nop, 0, sizeof(nop)); 52 53 nop.opcode = IT_NOP; 54 nop.type = PM4_TYPE_3; 55 nop.u32all |= PM4_COUNT_ZERO; 56 57 kq->dev = dev; 58 kq->nop_packet = nop.u32all; 59 switch (type) { 60 case KFD_QUEUE_TYPE_DIQ: 61 kq->mqd_mgr = dev->dqm->mqd_mgrs[KFD_MQD_TYPE_DIQ]; 62 break; 63 case KFD_QUEUE_TYPE_HIQ: 64 kq->mqd_mgr = dev->dqm->mqd_mgrs[KFD_MQD_TYPE_HIQ]; 65 break; 66 default: 67 pr_err("Invalid queue type %d\n", type); 68 return false; 69 } 70 71 if (!kq->mqd_mgr) 72 return false; 73 74 prop.doorbell_ptr = kfd_get_kernel_doorbell(dev, &prop.doorbell_off); 75 76 if (!prop.doorbell_ptr) { 77 pr_err("Failed to initialize doorbell"); 78 goto err_get_kernel_doorbell; 79 } 80 81 retval = kfd_gtt_sa_allocate(dev, queue_size, &kq->pq); 82 if (retval != 0) { 83 pr_err("Failed to init pq queues size %d\n", queue_size); 84 goto err_pq_allocate_vidmem; 85 } 86 87 kq->pq_kernel_addr = kq->pq->cpu_ptr; 88 kq->pq_gpu_addr = kq->pq->gpu_addr; 89 90 /* For CIK family asics, kq->eop_mem is not needed */ 91 if (dev->device_info->asic_family > CHIP_HAWAII) { 92 retval = kfd_gtt_sa_allocate(dev, PAGE_SIZE, &kq->eop_mem); 93 if (retval != 0) 94 goto err_eop_allocate_vidmem; 95 96 kq->eop_gpu_addr = kq->eop_mem->gpu_addr; 97 kq->eop_kernel_addr = kq->eop_mem->cpu_ptr; 98 99 memset(kq->eop_kernel_addr, 0, PAGE_SIZE); 100 } 101 102 retval = kfd_gtt_sa_allocate(dev, sizeof(*kq->rptr_kernel), 103 &kq->rptr_mem); 104 105 if (retval != 0) 106 goto err_rptr_allocate_vidmem; 107 108 kq->rptr_kernel = kq->rptr_mem->cpu_ptr; 109 kq->rptr_gpu_addr = kq->rptr_mem->gpu_addr; 110 111 retval = kfd_gtt_sa_allocate(dev, dev->device_info->doorbell_size, 112 &kq->wptr_mem); 113 114 if (retval != 0) 115 goto err_wptr_allocate_vidmem; 116 117 kq->wptr_kernel = kq->wptr_mem->cpu_ptr; 118 kq->wptr_gpu_addr = kq->wptr_mem->gpu_addr; 119 120 memset(kq->pq_kernel_addr, 0, queue_size); 121 memset(kq->rptr_kernel, 0, sizeof(*kq->rptr_kernel)); 122 memset(kq->wptr_kernel, 0, sizeof(*kq->wptr_kernel)); 123 124 prop.queue_size = queue_size; 125 prop.is_interop = false; 126 prop.priority = 1; 127 prop.queue_percent = 100; 128 prop.type = type; 129 prop.vmid = 0; 130 prop.queue_address = kq->pq_gpu_addr; 131 prop.read_ptr = (uint32_t *) kq->rptr_gpu_addr; 132 prop.write_ptr = (uint32_t *) kq->wptr_gpu_addr; 133 prop.eop_ring_buffer_address = kq->eop_gpu_addr; 134 prop.eop_ring_buffer_size = PAGE_SIZE; 135 prop.cu_mask = NULL; 136 137 if (init_queue(&kq->queue, &prop) != 0) 138 goto err_init_queue; 139 140 kq->queue->device = dev; 141 kq->queue->process = kfd_get_process(current); 142 143 kq->queue->mqd_mem_obj = kq->mqd_mgr->allocate_mqd(kq->mqd_mgr->dev, 144 &kq->queue->properties); 145 if (!kq->queue->mqd_mem_obj) 146 goto err_allocate_mqd; 147 kq->mqd_mgr->init_mqd(kq->mqd_mgr, &kq->queue->mqd, 148 kq->queue->mqd_mem_obj, 149 &kq->queue->gart_mqd_addr, 150 &kq->queue->properties); 151 /* assign HIQ to HQD */ 152 if (type == KFD_QUEUE_TYPE_HIQ) { 153 pr_debug("Assigning hiq to hqd\n"); 154 kq->queue->pipe = KFD_CIK_HIQ_PIPE; 155 kq->queue->queue = KFD_CIK_HIQ_QUEUE; 156 kq->mqd_mgr->load_mqd(kq->mqd_mgr, kq->queue->mqd, 157 kq->queue->pipe, kq->queue->queue, 158 &kq->queue->properties, NULL); 159 } else { 160 /* allocate fence for DIQ */ 161 162 retval = kfd_gtt_sa_allocate(dev, sizeof(uint32_t), 163 &kq->fence_mem_obj); 164 165 if (retval != 0) 166 goto err_alloc_fence; 167 168 kq->fence_kernel_address = kq->fence_mem_obj->cpu_ptr; 169 kq->fence_gpu_addr = kq->fence_mem_obj->gpu_addr; 170 } 171 172 print_queue(kq->queue); 173 174 return true; 175 err_alloc_fence: 176 kq->mqd_mgr->free_mqd(kq->mqd_mgr, kq->queue->mqd, kq->queue->mqd_mem_obj); 177 err_allocate_mqd: 178 uninit_queue(kq->queue); 179 err_init_queue: 180 kfd_gtt_sa_free(dev, kq->wptr_mem); 181 err_wptr_allocate_vidmem: 182 kfd_gtt_sa_free(dev, kq->rptr_mem); 183 err_rptr_allocate_vidmem: 184 kfd_gtt_sa_free(dev, kq->eop_mem); 185 err_eop_allocate_vidmem: 186 kfd_gtt_sa_free(dev, kq->pq); 187 err_pq_allocate_vidmem: 188 kfd_release_kernel_doorbell(dev, prop.doorbell_ptr); 189 err_get_kernel_doorbell: 190 return false; 191 192 } 193 194 static void uninitialize(struct kernel_queue *kq) 195 { 196 if (kq->queue->properties.type == KFD_QUEUE_TYPE_HIQ) 197 kq->mqd_mgr->destroy_mqd(kq->mqd_mgr, 198 kq->queue->mqd, 199 KFD_PREEMPT_TYPE_WAVEFRONT_RESET, 200 KFD_UNMAP_LATENCY_MS, 201 kq->queue->pipe, 202 kq->queue->queue); 203 else if (kq->queue->properties.type == KFD_QUEUE_TYPE_DIQ) 204 kfd_gtt_sa_free(kq->dev, kq->fence_mem_obj); 205 206 kq->mqd_mgr->free_mqd(kq->mqd_mgr, kq->queue->mqd, 207 kq->queue->mqd_mem_obj); 208 209 kfd_gtt_sa_free(kq->dev, kq->rptr_mem); 210 kfd_gtt_sa_free(kq->dev, kq->wptr_mem); 211 212 /* For CIK family asics, kq->eop_mem is Null, kfd_gtt_sa_free() 213 * is able to handle NULL properly. 214 */ 215 kfd_gtt_sa_free(kq->dev, kq->eop_mem); 216 217 kfd_gtt_sa_free(kq->dev, kq->pq); 218 kfd_release_kernel_doorbell(kq->dev, 219 kq->queue->properties.doorbell_ptr); 220 uninit_queue(kq->queue); 221 } 222 223 static int acquire_packet_buffer(struct kernel_queue *kq, 224 size_t packet_size_in_dwords, unsigned int **buffer_ptr) 225 { 226 size_t available_size; 227 size_t queue_size_dwords; 228 uint32_t wptr, rptr; 229 uint64_t wptr64; 230 unsigned int *queue_address; 231 232 /* When rptr == wptr, the buffer is empty. 233 * When rptr == wptr + 1, the buffer is full. 234 * It is always rptr that advances to the position of wptr, rather than 235 * the opposite. So we can only use up to queue_size_dwords - 1 dwords. 236 */ 237 rptr = *kq->rptr_kernel; 238 wptr = kq->pending_wptr; 239 wptr64 = kq->pending_wptr64; 240 queue_address = (unsigned int *)kq->pq_kernel_addr; 241 queue_size_dwords = kq->queue->properties.queue_size / 4; 242 243 pr_debug("rptr: %d\n", rptr); 244 pr_debug("wptr: %d\n", wptr); 245 pr_debug("queue_address 0x%p\n", queue_address); 246 247 available_size = (rptr + queue_size_dwords - 1 - wptr) % 248 queue_size_dwords; 249 250 if (packet_size_in_dwords > available_size) { 251 /* 252 * make sure calling functions know 253 * acquire_packet_buffer() failed 254 */ 255 goto err_no_space; 256 } 257 258 if (wptr + packet_size_in_dwords >= queue_size_dwords) { 259 /* make sure after rolling back to position 0, there is 260 * still enough space. 261 */ 262 if (packet_size_in_dwords >= rptr) 263 goto err_no_space; 264 265 /* fill nops, roll back and start at position 0 */ 266 while (wptr > 0) { 267 queue_address[wptr] = kq->nop_packet; 268 wptr = (wptr + 1) % queue_size_dwords; 269 wptr64++; 270 } 271 } 272 273 *buffer_ptr = &queue_address[wptr]; 274 kq->pending_wptr = wptr + packet_size_in_dwords; 275 kq->pending_wptr64 = wptr64 + packet_size_in_dwords; 276 277 return 0; 278 279 err_no_space: 280 *buffer_ptr = NULL; 281 return -ENOMEM; 282 } 283 284 static void submit_packet(struct kernel_queue *kq) 285 { 286 #ifdef DEBUG 287 int i; 288 289 for (i = *kq->wptr_kernel; i < kq->pending_wptr; i++) { 290 pr_debug("0x%2X ", kq->pq_kernel_addr[i]); 291 if (i % 15 == 0) 292 pr_debug("\n"); 293 } 294 pr_debug("\n"); 295 #endif 296 if (kq->dev->device_info->doorbell_size == 8) { 297 *kq->wptr64_kernel = kq->pending_wptr64; 298 write_kernel_doorbell64(kq->queue->properties.doorbell_ptr, 299 kq->pending_wptr64); 300 } else { 301 *kq->wptr_kernel = kq->pending_wptr; 302 write_kernel_doorbell(kq->queue->properties.doorbell_ptr, 303 kq->pending_wptr); 304 } 305 } 306 307 static void rollback_packet(struct kernel_queue *kq) 308 { 309 if (kq->dev->device_info->doorbell_size == 8) { 310 kq->pending_wptr64 = *kq->wptr64_kernel; 311 kq->pending_wptr = *kq->wptr_kernel % 312 (kq->queue->properties.queue_size / 4); 313 } else { 314 kq->pending_wptr = *kq->wptr_kernel; 315 } 316 } 317 318 struct kernel_queue *kernel_queue_init(struct kfd_dev *dev, 319 enum kfd_queue_type type) 320 { 321 struct kernel_queue *kq; 322 323 kq = kzalloc(sizeof(*kq), GFP_KERNEL); 324 if (!kq) 325 return NULL; 326 327 kq->ops.initialize = initialize; 328 kq->ops.uninitialize = uninitialize; 329 kq->ops.acquire_packet_buffer = acquire_packet_buffer; 330 kq->ops.submit_packet = submit_packet; 331 kq->ops.rollback_packet = rollback_packet; 332 333 if (kq->ops.initialize(kq, dev, type, KFD_KERNEL_QUEUE_SIZE)) 334 return kq; 335 336 pr_err("Failed to init kernel queue\n"); 337 338 kfree(kq); 339 return NULL; 340 } 341 342 void kernel_queue_uninit(struct kernel_queue *kq) 343 { 344 kq->ops.uninitialize(kq); 345 kfree(kq); 346 } 347 348 /* FIXME: Can this test be removed? */ 349 static __attribute__((unused)) void test_kq(struct kfd_dev *dev) 350 { 351 struct kernel_queue *kq; 352 uint32_t *buffer, i; 353 int retval; 354 355 pr_err("Starting kernel queue test\n"); 356 357 kq = kernel_queue_init(dev, KFD_QUEUE_TYPE_HIQ); 358 if (unlikely(!kq)) { 359 pr_err(" Failed to initialize HIQ\n"); 360 pr_err("Kernel queue test failed\n"); 361 return; 362 } 363 364 retval = kq->ops.acquire_packet_buffer(kq, 5, &buffer); 365 if (unlikely(retval != 0)) { 366 pr_err(" Failed to acquire packet buffer\n"); 367 pr_err("Kernel queue test failed\n"); 368 return; 369 } 370 for (i = 0; i < 5; i++) 371 buffer[i] = kq->nop_packet; 372 kq->ops.submit_packet(kq); 373 374 pr_err("Ending kernel queue test\n"); 375 } 376 377 378