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 BUG_ON(!kq || !dev); 45 BUG_ON(type != KFD_QUEUE_TYPE_DIQ && type != KFD_QUEUE_TYPE_HIQ); 46 47 pr_debug("kfd: In func %s initializing queue type %d size %d\n", 48 __func__, KFD_QUEUE_TYPE_HIQ, queue_size); 49 50 nop.opcode = IT_NOP; 51 nop.type = PM4_TYPE_3; 52 nop.u32all |= PM4_COUNT_ZERO; 53 54 kq->dev = dev; 55 kq->nop_packet = nop.u32all; 56 switch (type) { 57 case KFD_QUEUE_TYPE_DIQ: 58 case KFD_QUEUE_TYPE_HIQ: 59 kq->mqd = dev->dqm->get_mqd_manager(dev->dqm, 60 KFD_MQD_TYPE_CIK_HIQ); 61 break; 62 default: 63 BUG(); 64 break; 65 } 66 67 if (kq->mqd == NULL) 68 return false; 69 70 prop.doorbell_ptr = kfd_get_kernel_doorbell(dev, &prop.doorbell_off); 71 72 if (prop.doorbell_ptr == NULL) 73 goto err_get_kernel_doorbell; 74 75 retval = kfd2kgd->allocate_mem(dev->kgd, 76 queue_size, 77 PAGE_SIZE, 78 KFD_MEMPOOL_SYSTEM_WRITECOMBINE, 79 (struct kgd_mem **) &kq->pq); 80 81 if (retval != 0) 82 goto err_pq_allocate_vidmem; 83 84 kq->pq_kernel_addr = kq->pq->cpu_ptr; 85 kq->pq_gpu_addr = kq->pq->gpu_addr; 86 87 retval = kfd2kgd->allocate_mem(dev->kgd, 88 sizeof(*kq->rptr_kernel), 89 32, 90 KFD_MEMPOOL_SYSTEM_WRITECOMBINE, 91 (struct kgd_mem **) &kq->rptr_mem); 92 93 if (retval != 0) 94 goto err_rptr_allocate_vidmem; 95 96 kq->rptr_kernel = kq->rptr_mem->cpu_ptr; 97 kq->rptr_gpu_addr = kq->rptr_mem->gpu_addr; 98 99 retval = kfd2kgd->allocate_mem(dev->kgd, 100 sizeof(*kq->wptr_kernel), 101 32, 102 KFD_MEMPOOL_SYSTEM_WRITECOMBINE, 103 (struct kgd_mem **) &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; 124 125 if (init_queue(&kq->queue, prop) != 0) 126 goto err_init_queue; 127 128 kq->queue->device = dev; 129 kq->queue->process = kfd_get_process(current); 130 131 retval = kq->mqd->init_mqd(kq->mqd, &kq->queue->mqd, 132 &kq->queue->mqd_mem_obj, 133 &kq->queue->gart_mqd_addr, 134 &kq->queue->properties); 135 if (retval != 0) 136 goto err_init_mqd; 137 138 /* assign HIQ to HQD */ 139 if (type == KFD_QUEUE_TYPE_HIQ) { 140 pr_debug("assigning hiq to hqd\n"); 141 kq->queue->pipe = KFD_CIK_HIQ_PIPE; 142 kq->queue->queue = KFD_CIK_HIQ_QUEUE; 143 kq->mqd->load_mqd(kq->mqd, kq->queue->mqd, kq->queue->pipe, 144 kq->queue->queue, NULL); 145 } else { 146 /* allocate fence for DIQ */ 147 148 retval = kfd2kgd->allocate_mem(dev->kgd, 149 sizeof(uint32_t), 150 32, 151 KFD_MEMPOOL_SYSTEM_WRITECOMBINE, 152 (struct kgd_mem **) &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 kfd2kgd->free_mem(dev->kgd, (struct kgd_mem *) kq->wptr_mem); 169 err_wptr_allocate_vidmem: 170 kfd2kgd->free_mem(dev->kgd, (struct kgd_mem *) kq->rptr_mem); 171 err_rptr_allocate_vidmem: 172 kfd2kgd->free_mem(dev->kgd, (struct kgd_mem *) kq->pq); 173 err_pq_allocate_vidmem: 174 pr_err("kfd: error init pq\n"); 175 kfd_release_kernel_doorbell(dev, prop.doorbell_ptr); 176 err_get_kernel_doorbell: 177 pr_err("kfd: error init doorbell"); 178 return false; 179 180 } 181 182 static void uninitialize(struct kernel_queue *kq) 183 { 184 BUG_ON(!kq); 185 186 if (kq->queue->properties.type == KFD_QUEUE_TYPE_HIQ) 187 kq->mqd->destroy_mqd(kq->mqd, 188 NULL, 189 false, 190 QUEUE_PREEMPT_DEFAULT_TIMEOUT_MS, 191 kq->queue->pipe, 192 kq->queue->queue); 193 194 kfd2kgd->free_mem(kq->dev->kgd, (struct kgd_mem *) kq->rptr_mem); 195 kfd2kgd->free_mem(kq->dev->kgd, (struct kgd_mem *) kq->wptr_mem); 196 kfd2kgd->free_mem(kq->dev->kgd, (struct kgd_mem *) kq->pq); 197 kfd_release_kernel_doorbell(kq->dev, 198 kq->queue->properties.doorbell_ptr); 199 uninit_queue(kq->queue); 200 } 201 202 static int acquire_packet_buffer(struct kernel_queue *kq, 203 size_t packet_size_in_dwords, unsigned int **buffer_ptr) 204 { 205 size_t available_size; 206 size_t queue_size_dwords; 207 uint32_t wptr, rptr; 208 unsigned int *queue_address; 209 210 BUG_ON(!kq || !buffer_ptr); 211 212 rptr = *kq->rptr_kernel; 213 wptr = *kq->wptr_kernel; 214 queue_address = (unsigned int *)kq->pq_kernel_addr; 215 queue_size_dwords = kq->queue->properties.queue_size / sizeof(uint32_t); 216 217 pr_debug("kfd: In func %s\nrptr: %d\nwptr: %d\nqueue_address 0x%p\n", 218 __func__, rptr, wptr, queue_address); 219 220 available_size = (rptr - 1 - wptr + queue_size_dwords) % 221 queue_size_dwords; 222 223 if (packet_size_in_dwords >= queue_size_dwords || 224 packet_size_in_dwords >= available_size) { 225 /* 226 * make sure calling functions know 227 * acquire_packet_buffer() failed 228 */ 229 *buffer_ptr = NULL; 230 return -ENOMEM; 231 } 232 233 if (wptr + packet_size_in_dwords >= queue_size_dwords) { 234 while (wptr > 0) { 235 queue_address[wptr] = kq->nop_packet; 236 wptr = (wptr + 1) % queue_size_dwords; 237 } 238 } 239 240 *buffer_ptr = &queue_address[wptr]; 241 kq->pending_wptr = wptr + packet_size_in_dwords; 242 243 return 0; 244 } 245 246 static void submit_packet(struct kernel_queue *kq) 247 { 248 #ifdef DEBUG 249 int i; 250 #endif 251 252 BUG_ON(!kq); 253 254 #ifdef DEBUG 255 for (i = *kq->wptr_kernel; i < kq->pending_wptr; i++) { 256 pr_debug("0x%2X ", kq->pq_kernel_addr[i]); 257 if (i % 15 == 0) 258 pr_debug("\n"); 259 } 260 pr_debug("\n"); 261 #endif 262 263 *kq->wptr_kernel = kq->pending_wptr; 264 write_kernel_doorbell(kq->queue->properties.doorbell_ptr, 265 kq->pending_wptr); 266 } 267 268 static int sync_with_hw(struct kernel_queue *kq, unsigned long timeout_ms) 269 { 270 unsigned long org_timeout_ms; 271 272 BUG_ON(!kq); 273 274 org_timeout_ms = timeout_ms; 275 timeout_ms += jiffies * 1000 / HZ; 276 while (*kq->wptr_kernel != *kq->rptr_kernel) { 277 if (time_after(jiffies * 1000 / HZ, timeout_ms)) { 278 pr_err("kfd: kernel_queue %s timeout expired %lu\n", 279 __func__, org_timeout_ms); 280 pr_err("kfd: wptr: %d rptr: %d\n", 281 *kq->wptr_kernel, *kq->rptr_kernel); 282 return -ETIME; 283 } 284 schedule(); 285 } 286 287 return 0; 288 } 289 290 static void rollback_packet(struct kernel_queue *kq) 291 { 292 BUG_ON(!kq); 293 kq->pending_wptr = *kq->queue->properties.write_ptr; 294 } 295 296 struct kernel_queue *kernel_queue_init(struct kfd_dev *dev, 297 enum kfd_queue_type type) 298 { 299 struct kernel_queue *kq; 300 301 BUG_ON(!dev); 302 303 kq = kzalloc(sizeof(struct kernel_queue), GFP_KERNEL); 304 if (!kq) 305 return NULL; 306 307 kq->initialize = initialize; 308 kq->uninitialize = uninitialize; 309 kq->acquire_packet_buffer = acquire_packet_buffer; 310 kq->submit_packet = submit_packet; 311 kq->sync_with_hw = sync_with_hw; 312 kq->rollback_packet = rollback_packet; 313 314 if (kq->initialize(kq, dev, type, KFD_KERNEL_QUEUE_SIZE) == false) { 315 pr_err("kfd: failed to init kernel queue\n"); 316 kfree(kq); 317 return NULL; 318 } 319 return kq; 320 } 321 322 void kernel_queue_uninit(struct kernel_queue *kq) 323 { 324 BUG_ON(!kq); 325 326 kq->uninitialize(kq); 327 kfree(kq); 328 } 329 330 static __attribute__((unused)) void test_kq(struct kfd_dev *dev) 331 { 332 struct kernel_queue *kq; 333 uint32_t *buffer, i; 334 int retval; 335 336 BUG_ON(!dev); 337 338 pr_debug("kfd: starting kernel queue test\n"); 339 340 kq = kernel_queue_init(dev, KFD_QUEUE_TYPE_HIQ); 341 BUG_ON(!kq); 342 343 retval = kq->acquire_packet_buffer(kq, 5, &buffer); 344 BUG_ON(retval != 0); 345 for (i = 0; i < 5; i++) 346 buffer[i] = kq->nop_packet; 347 kq->submit_packet(kq); 348 kq->sync_with_hw(kq, 1000); 349 350 pr_debug("kfd: ending kernel queue test\n"); 351 } 352 353 354