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 case KFD_QUEUE_TYPE_HIQ: 62 kq->mqd = dev->dqm->ops.get_mqd_manager(dev->dqm, 63 KFD_MQD_TYPE_HIQ); 64 break; 65 default: 66 pr_err("Invalid queue type %d\n", type); 67 return false; 68 } 69 70 if (!kq->mqd) 71 return false; 72 73 prop.doorbell_ptr = kfd_get_kernel_doorbell(dev, &prop.doorbell_off); 74 75 if (!prop.doorbell_ptr) { 76 pr_err("Failed to initialize doorbell"); 77 goto err_get_kernel_doorbell; 78 } 79 80 retval = kfd_gtt_sa_allocate(dev, queue_size, &kq->pq); 81 if (retval != 0) { 82 pr_err("Failed to init pq queues size %d\n", queue_size); 83 goto err_pq_allocate_vidmem; 84 } 85 86 kq->pq_kernel_addr = kq->pq->cpu_ptr; 87 kq->pq_gpu_addr = kq->pq->gpu_addr; 88 89 retval = kq->ops_asic_specific.initialize(kq, dev, type, queue_size); 90 if (!retval) 91 goto err_eop_allocate_vidmem; 92 93 retval = kfd_gtt_sa_allocate(dev, sizeof(*kq->rptr_kernel), 94 &kq->rptr_mem); 95 96 if (retval != 0) 97 goto err_rptr_allocate_vidmem; 98 99 kq->rptr_kernel = kq->rptr_mem->cpu_ptr; 100 kq->rptr_gpu_addr = kq->rptr_mem->gpu_addr; 101 102 retval = kfd_gtt_sa_allocate(dev, dev->device_info->doorbell_size, 103 &kq->wptr_mem); 104 105 if (retval != 0) 106 goto err_wptr_allocate_vidmem; 107 108 kq->wptr_kernel = kq->wptr_mem->cpu_ptr; 109 kq->wptr_gpu_addr = kq->wptr_mem->gpu_addr; 110 111 memset(kq->pq_kernel_addr, 0, queue_size); 112 memset(kq->rptr_kernel, 0, sizeof(*kq->rptr_kernel)); 113 memset(kq->wptr_kernel, 0, sizeof(*kq->wptr_kernel)); 114 115 prop.queue_size = queue_size; 116 prop.is_interop = false; 117 prop.priority = 1; 118 prop.queue_percent = 100; 119 prop.type = type; 120 prop.vmid = 0; 121 prop.queue_address = kq->pq_gpu_addr; 122 prop.read_ptr = (uint32_t *) kq->rptr_gpu_addr; 123 prop.write_ptr = (uint32_t *) kq->wptr_gpu_addr; 124 prop.eop_ring_buffer_address = kq->eop_gpu_addr; 125 prop.eop_ring_buffer_size = PAGE_SIZE; 126 127 if (init_queue(&kq->queue, &prop) != 0) 128 goto err_init_queue; 129 130 kq->queue->device = dev; 131 kq->queue->process = kfd_get_process(current); 132 133 retval = kq->mqd->init_mqd(kq->mqd, &kq->queue->mqd, 134 &kq->queue->mqd_mem_obj, 135 &kq->queue->gart_mqd_addr, 136 &kq->queue->properties); 137 if (retval != 0) 138 goto err_init_mqd; 139 140 /* assign HIQ to HQD */ 141 if (type == KFD_QUEUE_TYPE_HIQ) { 142 pr_debug("Assigning hiq to hqd\n"); 143 kq->queue->pipe = KFD_CIK_HIQ_PIPE; 144 kq->queue->queue = KFD_CIK_HIQ_QUEUE; 145 kq->mqd->load_mqd(kq->mqd, kq->queue->mqd, kq->queue->pipe, 146 kq->queue->queue, &kq->queue->properties, 147 NULL); 148 } else { 149 /* allocate fence for DIQ */ 150 151 retval = kfd_gtt_sa_allocate(dev, sizeof(uint32_t), 152 &kq->fence_mem_obj); 153 154 if (retval != 0) 155 goto err_alloc_fence; 156 157 kq->fence_kernel_address = kq->fence_mem_obj->cpu_ptr; 158 kq->fence_gpu_addr = kq->fence_mem_obj->gpu_addr; 159 } 160 161 print_queue(kq->queue); 162 163 return true; 164 err_alloc_fence: 165 err_init_mqd: 166 uninit_queue(kq->queue); 167 err_init_queue: 168 kfd_gtt_sa_free(dev, kq->wptr_mem); 169 err_wptr_allocate_vidmem: 170 kfd_gtt_sa_free(dev, kq->rptr_mem); 171 err_rptr_allocate_vidmem: 172 kfd_gtt_sa_free(dev, kq->eop_mem); 173 err_eop_allocate_vidmem: 174 kfd_gtt_sa_free(dev, kq->pq); 175 err_pq_allocate_vidmem: 176 kfd_release_kernel_doorbell(dev, prop.doorbell_ptr); 177 err_get_kernel_doorbell: 178 return false; 179 180 } 181 182 static void uninitialize(struct kernel_queue *kq) 183 { 184 if (kq->queue->properties.type == KFD_QUEUE_TYPE_HIQ) 185 kq->mqd->destroy_mqd(kq->mqd, 186 kq->queue->mqd, 187 KFD_PREEMPT_TYPE_WAVEFRONT_RESET, 188 KFD_UNMAP_LATENCY_MS, 189 kq->queue->pipe, 190 kq->queue->queue); 191 else if (kq->queue->properties.type == KFD_QUEUE_TYPE_DIQ) 192 kfd_gtt_sa_free(kq->dev, kq->fence_mem_obj); 193 194 kq->mqd->uninit_mqd(kq->mqd, kq->queue->mqd, kq->queue->mqd_mem_obj); 195 196 kfd_gtt_sa_free(kq->dev, kq->rptr_mem); 197 kfd_gtt_sa_free(kq->dev, kq->wptr_mem); 198 kq->ops_asic_specific.uninitialize(kq); 199 kfd_gtt_sa_free(kq->dev, kq->pq); 200 kfd_release_kernel_doorbell(kq->dev, 201 kq->queue->properties.doorbell_ptr); 202 uninit_queue(kq->queue); 203 } 204 205 static int acquire_packet_buffer(struct kernel_queue *kq, 206 size_t packet_size_in_dwords, unsigned int **buffer_ptr) 207 { 208 size_t available_size; 209 size_t queue_size_dwords; 210 uint32_t wptr, rptr; 211 uint64_t wptr64; 212 unsigned int *queue_address; 213 214 /* When rptr == wptr, the buffer is empty. 215 * When rptr == wptr + 1, the buffer is full. 216 * It is always rptr that advances to the position of wptr, rather than 217 * the opposite. So we can only use up to queue_size_dwords - 1 dwords. 218 */ 219 rptr = *kq->rptr_kernel; 220 wptr = kq->pending_wptr; 221 wptr64 = kq->pending_wptr64; 222 queue_address = (unsigned int *)kq->pq_kernel_addr; 223 queue_size_dwords = kq->queue->properties.queue_size / 4; 224 225 pr_debug("rptr: %d\n", rptr); 226 pr_debug("wptr: %d\n", wptr); 227 pr_debug("queue_address 0x%p\n", queue_address); 228 229 available_size = (rptr + queue_size_dwords - 1 - wptr) % 230 queue_size_dwords; 231 232 if (packet_size_in_dwords > available_size) { 233 /* 234 * make sure calling functions know 235 * acquire_packet_buffer() failed 236 */ 237 goto err_no_space; 238 } 239 240 if (wptr + packet_size_in_dwords >= queue_size_dwords) { 241 /* make sure after rolling back to position 0, there is 242 * still enough space. 243 */ 244 if (packet_size_in_dwords >= rptr) 245 goto err_no_space; 246 247 /* fill nops, roll back and start at position 0 */ 248 while (wptr > 0) { 249 queue_address[wptr] = kq->nop_packet; 250 wptr = (wptr + 1) % queue_size_dwords; 251 wptr64++; 252 } 253 } 254 255 *buffer_ptr = &queue_address[wptr]; 256 kq->pending_wptr = wptr + packet_size_in_dwords; 257 kq->pending_wptr64 = wptr64 + packet_size_in_dwords; 258 259 return 0; 260 261 err_no_space: 262 *buffer_ptr = NULL; 263 return -ENOMEM; 264 } 265 266 static void submit_packet(struct kernel_queue *kq) 267 { 268 #ifdef DEBUG 269 int i; 270 271 for (i = *kq->wptr_kernel; i < kq->pending_wptr; i++) { 272 pr_debug("0x%2X ", kq->pq_kernel_addr[i]); 273 if (i % 15 == 0) 274 pr_debug("\n"); 275 } 276 pr_debug("\n"); 277 #endif 278 279 kq->ops_asic_specific.submit_packet(kq); 280 } 281 282 static void rollback_packet(struct kernel_queue *kq) 283 { 284 if (kq->dev->device_info->doorbell_size == 8) { 285 kq->pending_wptr64 = *kq->wptr64_kernel; 286 kq->pending_wptr = *kq->wptr_kernel % 287 (kq->queue->properties.queue_size / 4); 288 } else { 289 kq->pending_wptr = *kq->wptr_kernel; 290 } 291 } 292 293 struct kernel_queue *kernel_queue_init(struct kfd_dev *dev, 294 enum kfd_queue_type type) 295 { 296 struct kernel_queue *kq; 297 298 kq = kzalloc(sizeof(*kq), GFP_KERNEL); 299 if (!kq) 300 return NULL; 301 302 kq->ops.initialize = initialize; 303 kq->ops.uninitialize = uninitialize; 304 kq->ops.acquire_packet_buffer = acquire_packet_buffer; 305 kq->ops.submit_packet = submit_packet; 306 kq->ops.rollback_packet = rollback_packet; 307 308 switch (dev->device_info->asic_family) { 309 case CHIP_CARRIZO: 310 case CHIP_TONGA: 311 case CHIP_FIJI: 312 case CHIP_POLARIS10: 313 case CHIP_POLARIS11: 314 kernel_queue_init_vi(&kq->ops_asic_specific); 315 break; 316 317 case CHIP_KAVERI: 318 case CHIP_HAWAII: 319 kernel_queue_init_cik(&kq->ops_asic_specific); 320 break; 321 322 case CHIP_VEGA10: 323 case CHIP_RAVEN: 324 kernel_queue_init_v9(&kq->ops_asic_specific); 325 break; 326 default: 327 WARN(1, "Unexpected ASIC family %u", 328 dev->device_info->asic_family); 329 goto out_free; 330 } 331 332 if (kq->ops.initialize(kq, dev, type, KFD_KERNEL_QUEUE_SIZE)) 333 return kq; 334 335 pr_err("Failed to init kernel queue\n"); 336 337 out_free: 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