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 /* Initialize a kernel queue, including allocations of GART memory 38 * needed for the queue. 39 */ 40 static bool kq_initialize(struct kernel_queue *kq, struct kfd_dev *dev, 41 enum kfd_queue_type type, unsigned int queue_size) 42 { 43 struct queue_properties prop; 44 int retval; 45 union PM4_MES_TYPE_3_HEADER nop; 46 47 if (WARN_ON(type != KFD_QUEUE_TYPE_DIQ && type != KFD_QUEUE_TYPE_HIQ)) 48 return false; 49 50 pr_debug("Initializing queue type %d size %d\n", KFD_QUEUE_TYPE_HIQ, 51 queue_size); 52 53 memset(&prop, 0, sizeof(prop)); 54 memset(&nop, 0, sizeof(nop)); 55 56 nop.opcode = IT_NOP; 57 nop.type = PM4_TYPE_3; 58 nop.u32all |= PM4_COUNT_ZERO; 59 60 kq->dev = dev; 61 kq->nop_packet = nop.u32all; 62 switch (type) { 63 case KFD_QUEUE_TYPE_DIQ: 64 kq->mqd_mgr = dev->dqm->mqd_mgrs[KFD_MQD_TYPE_DIQ]; 65 break; 66 case KFD_QUEUE_TYPE_HIQ: 67 kq->mqd_mgr = dev->dqm->mqd_mgrs[KFD_MQD_TYPE_HIQ]; 68 break; 69 default: 70 pr_err("Invalid queue type %d\n", type); 71 return false; 72 } 73 74 if (!kq->mqd_mgr) 75 return false; 76 77 prop.doorbell_ptr = kfd_get_kernel_doorbell(dev, &prop.doorbell_off); 78 79 if (!prop.doorbell_ptr) { 80 pr_err("Failed to initialize doorbell"); 81 goto err_get_kernel_doorbell; 82 } 83 84 retval = kfd_gtt_sa_allocate(dev, queue_size, &kq->pq); 85 if (retval != 0) { 86 pr_err("Failed to init pq queues size %d\n", 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->device_info->asic_family > 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->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, sizeof(*kq->wptr_kernel)); 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, 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, bool hanging) 199 { 200 if (kq->queue->properties.type == KFD_QUEUE_TYPE_HIQ && !hanging) 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 else if (kq->queue->properties.type == KFD_QUEUE_TYPE_DIQ) 208 kfd_gtt_sa_free(kq->dev, kq->fence_mem_obj); 209 210 kq->mqd_mgr->free_mqd(kq->mqd_mgr, kq->queue->mqd, 211 kq->queue->mqd_mem_obj); 212 213 kfd_gtt_sa_free(kq->dev, kq->rptr_mem); 214 kfd_gtt_sa_free(kq->dev, kq->wptr_mem); 215 216 /* For CIK family asics, kq->eop_mem is Null, kfd_gtt_sa_free() 217 * is able to handle NULL properly. 218 */ 219 kfd_gtt_sa_free(kq->dev, kq->eop_mem); 220 221 kfd_gtt_sa_free(kq->dev, kq->pq); 222 kfd_release_kernel_doorbell(kq->dev, 223 kq->queue->properties.doorbell_ptr); 224 uninit_queue(kq->queue); 225 } 226 227 int kq_acquire_packet_buffer(struct kernel_queue *kq, 228 size_t packet_size_in_dwords, unsigned int **buffer_ptr) 229 { 230 size_t available_size; 231 size_t queue_size_dwords; 232 uint32_t wptr, rptr; 233 uint64_t wptr64; 234 unsigned int *queue_address; 235 236 /* When rptr == wptr, the buffer is empty. 237 * When rptr == wptr + 1, the buffer is full. 238 * It is always rptr that advances to the position of wptr, rather than 239 * the opposite. So we can only use up to queue_size_dwords - 1 dwords. 240 */ 241 rptr = *kq->rptr_kernel; 242 wptr = kq->pending_wptr; 243 wptr64 = kq->pending_wptr64; 244 queue_address = (unsigned int *)kq->pq_kernel_addr; 245 queue_size_dwords = kq->queue->properties.queue_size / 4; 246 247 pr_debug("rptr: %d\n", rptr); 248 pr_debug("wptr: %d\n", wptr); 249 pr_debug("queue_address 0x%p\n", queue_address); 250 251 available_size = (rptr + queue_size_dwords - 1 - wptr) % 252 queue_size_dwords; 253 254 if (packet_size_in_dwords > available_size) { 255 /* 256 * make sure calling functions know 257 * acquire_packet_buffer() failed 258 */ 259 goto err_no_space; 260 } 261 262 if (wptr + packet_size_in_dwords >= queue_size_dwords) { 263 /* make sure after rolling back to position 0, there is 264 * still enough space. 265 */ 266 if (packet_size_in_dwords >= rptr) 267 goto err_no_space; 268 269 /* fill nops, roll back and start at position 0 */ 270 while (wptr > 0) { 271 queue_address[wptr] = kq->nop_packet; 272 wptr = (wptr + 1) % queue_size_dwords; 273 wptr64++; 274 } 275 } 276 277 *buffer_ptr = &queue_address[wptr]; 278 kq->pending_wptr = wptr + packet_size_in_dwords; 279 kq->pending_wptr64 = wptr64 + packet_size_in_dwords; 280 281 return 0; 282 283 err_no_space: 284 *buffer_ptr = NULL; 285 return -ENOMEM; 286 } 287 288 void kq_submit_packet(struct kernel_queue *kq) 289 { 290 #ifdef DEBUG 291 int i; 292 293 for (i = *kq->wptr_kernel; i < kq->pending_wptr; i++) { 294 pr_debug("0x%2X ", kq->pq_kernel_addr[i]); 295 if (i % 15 == 0) 296 pr_debug("\n"); 297 } 298 pr_debug("\n"); 299 #endif 300 if (kq->dev->device_info->doorbell_size == 8) { 301 *kq->wptr64_kernel = kq->pending_wptr64; 302 write_kernel_doorbell64(kq->queue->properties.doorbell_ptr, 303 kq->pending_wptr64); 304 } else { 305 *kq->wptr_kernel = kq->pending_wptr; 306 write_kernel_doorbell(kq->queue->properties.doorbell_ptr, 307 kq->pending_wptr); 308 } 309 } 310 311 void kq_rollback_packet(struct kernel_queue *kq) 312 { 313 if (kq->dev->device_info->doorbell_size == 8) { 314 kq->pending_wptr64 = *kq->wptr64_kernel; 315 kq->pending_wptr = *kq->wptr_kernel % 316 (kq->queue->properties.queue_size / 4); 317 } else { 318 kq->pending_wptr = *kq->wptr_kernel; 319 } 320 } 321 322 struct kernel_queue *kernel_queue_init(struct kfd_dev *dev, 323 enum kfd_queue_type type) 324 { 325 struct kernel_queue *kq; 326 327 kq = kzalloc(sizeof(*kq), GFP_KERNEL); 328 if (!kq) 329 return NULL; 330 331 if (kq_initialize(kq, dev, type, KFD_KERNEL_QUEUE_SIZE)) 332 return kq; 333 334 pr_err("Failed to init kernel queue\n"); 335 336 kfree(kq); 337 return NULL; 338 } 339 340 void kernel_queue_uninit(struct kernel_queue *kq, bool hanging) 341 { 342 kq_uninitialize(kq, hanging); 343 kfree(kq); 344 } 345 346 /* FIXME: Can this test be removed? */ 347 static __attribute__((unused)) void test_kq(struct kfd_dev *dev) 348 { 349 struct kernel_queue *kq; 350 uint32_t *buffer, i; 351 int retval; 352 353 pr_err("Starting kernel queue test\n"); 354 355 kq = kernel_queue_init(dev, KFD_QUEUE_TYPE_HIQ); 356 if (unlikely(!kq)) { 357 pr_err(" Failed to initialize HIQ\n"); 358 pr_err("Kernel queue test failed\n"); 359 return; 360 } 361 362 retval = kq_acquire_packet_buffer(kq, 5, &buffer); 363 if (unlikely(retval != 0)) { 364 pr_err(" Failed to acquire packet buffer\n"); 365 pr_err("Kernel queue test failed\n"); 366 return; 367 } 368 for (i = 0; i < 5; i++) 369 buffer[i] = kq->nop_packet; 370 kq_submit_packet(kq); 371 372 pr_err("Ending kernel queue test\n"); 373 } 374 375 376