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->ops.get_mqd_manager(dev->dqm, 60 KFD_MQD_TYPE_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 = kfd_gtt_sa_allocate(dev, queue_size, &kq->pq); 76 if (retval != 0) 77 goto err_pq_allocate_vidmem; 78 79 kq->pq_kernel_addr = kq->pq->cpu_ptr; 80 kq->pq_gpu_addr = kq->pq->gpu_addr; 81 82 retval = kq->ops_asic_specific.initialize(kq, dev, type, queue_size); 83 if (retval == false) 84 goto err_eop_allocate_vidmem; 85 86 retval = kfd_gtt_sa_allocate(dev, sizeof(*kq->rptr_kernel), 87 &kq->rptr_mem); 88 89 if (retval != 0) 90 goto err_rptr_allocate_vidmem; 91 92 kq->rptr_kernel = kq->rptr_mem->cpu_ptr; 93 kq->rptr_gpu_addr = kq->rptr_mem->gpu_addr; 94 95 retval = kfd_gtt_sa_allocate(dev, sizeof(*kq->wptr_kernel), 96 &kq->wptr_mem); 97 98 if (retval != 0) 99 goto err_wptr_allocate_vidmem; 100 101 kq->wptr_kernel = kq->wptr_mem->cpu_ptr; 102 kq->wptr_gpu_addr = kq->wptr_mem->gpu_addr; 103 104 memset(kq->pq_kernel_addr, 0, queue_size); 105 memset(kq->rptr_kernel, 0, sizeof(*kq->rptr_kernel)); 106 memset(kq->wptr_kernel, 0, sizeof(*kq->wptr_kernel)); 107 108 prop.queue_size = queue_size; 109 prop.is_interop = false; 110 prop.priority = 1; 111 prop.queue_percent = 100; 112 prop.type = type; 113 prop.vmid = 0; 114 prop.queue_address = kq->pq_gpu_addr; 115 prop.read_ptr = (uint32_t *) kq->rptr_gpu_addr; 116 prop.write_ptr = (uint32_t *) kq->wptr_gpu_addr; 117 prop.eop_ring_buffer_address = kq->eop_gpu_addr; 118 prop.eop_ring_buffer_size = PAGE_SIZE; 119 120 if (init_queue(&kq->queue, prop) != 0) 121 goto err_init_queue; 122 123 kq->queue->device = dev; 124 kq->queue->process = kfd_get_process(current); 125 126 retval = kq->mqd->init_mqd(kq->mqd, &kq->queue->mqd, 127 &kq->queue->mqd_mem_obj, 128 &kq->queue->gart_mqd_addr, 129 &kq->queue->properties); 130 if (retval != 0) 131 goto err_init_mqd; 132 133 /* assign HIQ to HQD */ 134 if (type == KFD_QUEUE_TYPE_HIQ) { 135 pr_debug("assigning hiq to hqd\n"); 136 kq->queue->pipe = KFD_CIK_HIQ_PIPE; 137 kq->queue->queue = KFD_CIK_HIQ_QUEUE; 138 kq->mqd->load_mqd(kq->mqd, kq->queue->mqd, kq->queue->pipe, 139 kq->queue->queue, NULL); 140 } else { 141 /* allocate fence for DIQ */ 142 143 retval = kfd_gtt_sa_allocate(dev, sizeof(uint32_t), 144 &kq->fence_mem_obj); 145 146 if (retval != 0) 147 goto err_alloc_fence; 148 149 kq->fence_kernel_address = kq->fence_mem_obj->cpu_ptr; 150 kq->fence_gpu_addr = kq->fence_mem_obj->gpu_addr; 151 } 152 153 print_queue(kq->queue); 154 155 return true; 156 err_alloc_fence: 157 err_init_mqd: 158 uninit_queue(kq->queue); 159 err_init_queue: 160 kfd_gtt_sa_free(dev, kq->wptr_mem); 161 err_wptr_allocate_vidmem: 162 kfd_gtt_sa_free(dev, kq->rptr_mem); 163 err_rptr_allocate_vidmem: 164 kfd_gtt_sa_free(dev, kq->eop_mem); 165 err_eop_allocate_vidmem: 166 kfd_gtt_sa_free(dev, kq->pq); 167 err_pq_allocate_vidmem: 168 pr_err("kfd: error init pq\n"); 169 kfd_release_kernel_doorbell(dev, prop.doorbell_ptr); 170 err_get_kernel_doorbell: 171 pr_err("kfd: error init doorbell"); 172 return false; 173 174 } 175 176 static void uninitialize(struct kernel_queue *kq) 177 { 178 BUG_ON(!kq); 179 180 if (kq->queue->properties.type == KFD_QUEUE_TYPE_HIQ) 181 kq->mqd->destroy_mqd(kq->mqd, 182 NULL, 183 false, 184 QUEUE_PREEMPT_DEFAULT_TIMEOUT_MS, 185 kq->queue->pipe, 186 kq->queue->queue); 187 else if (kq->queue->properties.type == KFD_QUEUE_TYPE_DIQ) 188 kfd_gtt_sa_free(kq->dev, kq->fence_mem_obj); 189 190 kfd_gtt_sa_free(kq->dev, kq->rptr_mem); 191 kfd_gtt_sa_free(kq->dev, kq->wptr_mem); 192 kq->ops_asic_specific.uninitialize(kq); 193 kfd_gtt_sa_free(kq->dev, kq->pq); 194 kfd_release_kernel_doorbell(kq->dev, 195 kq->queue->properties.doorbell_ptr); 196 uninit_queue(kq->queue); 197 } 198 199 static int acquire_packet_buffer(struct kernel_queue *kq, 200 size_t packet_size_in_dwords, unsigned int **buffer_ptr) 201 { 202 size_t available_size; 203 size_t queue_size_dwords; 204 uint32_t wptr, rptr; 205 unsigned int *queue_address; 206 207 BUG_ON(!kq || !buffer_ptr); 208 209 rptr = *kq->rptr_kernel; 210 wptr = *kq->wptr_kernel; 211 queue_address = (unsigned int *)kq->pq_kernel_addr; 212 queue_size_dwords = kq->queue->properties.queue_size / sizeof(uint32_t); 213 214 pr_debug("kfd: In func %s\nrptr: %d\nwptr: %d\nqueue_address 0x%p\n", 215 __func__, rptr, wptr, queue_address); 216 217 available_size = (rptr - 1 - wptr + queue_size_dwords) % 218 queue_size_dwords; 219 220 if (packet_size_in_dwords >= queue_size_dwords || 221 packet_size_in_dwords >= available_size) { 222 /* 223 * make sure calling functions know 224 * acquire_packet_buffer() failed 225 */ 226 *buffer_ptr = NULL; 227 return -ENOMEM; 228 } 229 230 if (wptr + packet_size_in_dwords >= queue_size_dwords) { 231 while (wptr > 0) { 232 queue_address[wptr] = kq->nop_packet; 233 wptr = (wptr + 1) % queue_size_dwords; 234 } 235 } 236 237 *buffer_ptr = &queue_address[wptr]; 238 kq->pending_wptr = wptr + packet_size_in_dwords; 239 240 return 0; 241 } 242 243 static void submit_packet(struct kernel_queue *kq) 244 { 245 #ifdef DEBUG 246 int i; 247 #endif 248 249 BUG_ON(!kq); 250 251 #ifdef DEBUG 252 for (i = *kq->wptr_kernel; i < kq->pending_wptr; i++) { 253 pr_debug("0x%2X ", kq->pq_kernel_addr[i]); 254 if (i % 15 == 0) 255 pr_debug("\n"); 256 } 257 pr_debug("\n"); 258 #endif 259 260 *kq->wptr_kernel = kq->pending_wptr; 261 write_kernel_doorbell(kq->queue->properties.doorbell_ptr, 262 kq->pending_wptr); 263 } 264 265 static void rollback_packet(struct kernel_queue *kq) 266 { 267 BUG_ON(!kq); 268 kq->pending_wptr = *kq->queue->properties.write_ptr; 269 } 270 271 struct kernel_queue *kernel_queue_init(struct kfd_dev *dev, 272 enum kfd_queue_type type) 273 { 274 struct kernel_queue *kq; 275 276 BUG_ON(!dev); 277 278 kq = kzalloc(sizeof(struct kernel_queue), GFP_KERNEL); 279 if (!kq) 280 return NULL; 281 282 kq->ops.initialize = initialize; 283 kq->ops.uninitialize = uninitialize; 284 kq->ops.acquire_packet_buffer = acquire_packet_buffer; 285 kq->ops.submit_packet = submit_packet; 286 kq->ops.rollback_packet = rollback_packet; 287 288 switch (dev->device_info->asic_family) { 289 case CHIP_CARRIZO: 290 kernel_queue_init_vi(&kq->ops_asic_specific); 291 break; 292 293 case CHIP_KAVERI: 294 kernel_queue_init_cik(&kq->ops_asic_specific); 295 break; 296 } 297 298 if (kq->ops.initialize(kq, dev, type, KFD_KERNEL_QUEUE_SIZE) == false) { 299 pr_err("kfd: failed to init kernel queue\n"); 300 kfree(kq); 301 return NULL; 302 } 303 return kq; 304 } 305 306 void kernel_queue_uninit(struct kernel_queue *kq) 307 { 308 BUG_ON(!kq); 309 310 kq->ops.uninitialize(kq); 311 kfree(kq); 312 } 313 314 static __attribute__((unused)) void test_kq(struct kfd_dev *dev) 315 { 316 struct kernel_queue *kq; 317 uint32_t *buffer, i; 318 int retval; 319 320 BUG_ON(!dev); 321 322 pr_err("kfd: starting kernel queue test\n"); 323 324 kq = kernel_queue_init(dev, KFD_QUEUE_TYPE_HIQ); 325 BUG_ON(!kq); 326 327 retval = kq->ops.acquire_packet_buffer(kq, 5, &buffer); 328 BUG_ON(retval != 0); 329 for (i = 0; i < 5; i++) 330 buffer[i] = kq->nop_packet; 331 kq->ops.submit_packet(kq); 332 333 pr_err("kfd: ending kernel queue test\n"); 334 } 335 336 337