drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue.c

   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_mgr = 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_mgr)
  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         prop.cu_mask = NULL;
 127
 128         if (init_queue(&kq->queue, &prop) != 0)
 129                 goto err_init_queue;
 130
 131         kq->queue->device = dev;
 132         kq->queue->process = kfd_get_process(current);
 133
 134         retval = kq->mqd_mgr->init_mqd(kq->mqd_mgr, &kq->queue->mqd,
 135                                         &kq->queue->mqd_mem_obj,
 136                                         &kq->queue->gart_mqd_addr,
 137                                         &kq->queue->properties);
 138         if (retval != 0)
 139                 goto err_init_mqd;
 140
 141         /* assign HIQ to HQD */
 142         if (type == KFD_QUEUE_TYPE_HIQ) {
 143                 pr_debug("Assigning hiq to hqd\n");
 144                 kq->queue->pipe = KFD_CIK_HIQ_PIPE;
 145                 kq->queue->queue = KFD_CIK_HIQ_QUEUE;
 146                 kq->mqd_mgr->load_mqd(kq->mqd_mgr, kq->queue->mqd,
 147                                 kq->queue->pipe, kq->queue->queue,
 148                                 &kq->queue->properties, NULL);
 149         } else {
 150                 /* allocate fence for DIQ */
 151
 152                 retval = kfd_gtt_sa_allocate(dev, sizeof(uint32_t),
 153                                                 &kq->fence_mem_obj);
 154
 155                 if (retval != 0)
 156                         goto err_alloc_fence;
 157
 158                 kq->fence_kernel_address = kq->fence_mem_obj->cpu_ptr;
 159                 kq->fence_gpu_addr = kq->fence_mem_obj->gpu_addr;
 160         }
 161
 162         print_queue(kq->queue);
 163
 164         return true;
 165 err_alloc_fence:
 166 err_init_mqd:
 167         uninit_queue(kq->queue);
 168 err_init_queue:
 169         kfd_gtt_sa_free(dev, kq->wptr_mem);
 170 err_wptr_allocate_vidmem:
 171         kfd_gtt_sa_free(dev, kq->rptr_mem);
 172 err_rptr_allocate_vidmem:
 173         kfd_gtt_sa_free(dev, kq->eop_mem);
 174 err_eop_allocate_vidmem:
 175         kfd_gtt_sa_free(dev, kq->pq);
 176 err_pq_allocate_vidmem:
 177         kfd_release_kernel_doorbell(dev, prop.doorbell_ptr);
 178 err_get_kernel_doorbell:
 179         return false;
 180
 181 }
 182
 183 static void uninitialize(struct kernel_queue *kq)
 184 {
 185         if (kq->queue->properties.type == KFD_QUEUE_TYPE_HIQ)
 186                 kq->mqd_mgr->destroy_mqd(kq->mqd_mgr,
 187                                         kq->queue->mqd,
 188                                         KFD_PREEMPT_TYPE_WAVEFRONT_RESET,
 189                                         KFD_UNMAP_LATENCY_MS,
 190                                         kq->queue->pipe,
 191                                         kq->queue->queue);
 192         else if (kq->queue->properties.type == KFD_QUEUE_TYPE_DIQ)
 193                 kfd_gtt_sa_free(kq->dev, kq->fence_mem_obj);
 194
 195         kq->mqd_mgr->uninit_mqd(kq->mqd_mgr, kq->queue->mqd,
 196                                 kq->queue->mqd_mem_obj);
 197
 198         kfd_gtt_sa_free(kq->dev, kq->rptr_mem);
 199         kfd_gtt_sa_free(kq->dev, kq->wptr_mem);
 200         kq->ops_asic_specific.uninitialize(kq);
 201         kfd_gtt_sa_free(kq->dev, kq->pq);
 202         kfd_release_kernel_doorbell(kq->dev,
 203                                         kq->queue->properties.doorbell_ptr);
 204         uninit_queue(kq->queue);
 205 }
 206
 207 static int acquire_packet_buffer(struct kernel_queue *kq,
 208                 size_t packet_size_in_dwords, unsigned int **buffer_ptr)
 209 {
 210         size_t available_size;
 211         size_t queue_size_dwords;
 212         uint32_t wptr, rptr;
 213         uint64_t wptr64;
 214         unsigned int *queue_address;
 215
 216         /* When rptr == wptr, the buffer is empty.
 217          * When rptr == wptr + 1, the buffer is full.
 218          * It is always rptr that advances to the position of wptr, rather than
 219          * the opposite. So we can only use up to queue_size_dwords - 1 dwords.
 220          */
 221         rptr = *kq->rptr_kernel;
 222         wptr = kq->pending_wptr;
 223         wptr64 = kq->pending_wptr64;
 224         queue_address = (unsigned int *)kq->pq_kernel_addr;
 225         queue_size_dwords = kq->queue->properties.queue_size / 4;
 226
 227         pr_debug("rptr: %d\n", rptr);
 228         pr_debug("wptr: %d\n", wptr);
 229         pr_debug("queue_address 0x%p\n", queue_address);
 230
 231         available_size = (rptr + queue_size_dwords - 1 - wptr) %
 232                                                         queue_size_dwords;
 233
 234         if (packet_size_in_dwords > available_size) {
 235                 /*
 236                  * make sure calling functions know
 237                  * acquire_packet_buffer() failed
 238                  */
 239                 goto err_no_space;
 240         }
 241
 242         if (wptr + packet_size_in_dwords >= queue_size_dwords) {
 243                 /* make sure after rolling back to position 0, there is
 244                  * still enough space.
 245                  */
 246                 if (packet_size_in_dwords >= rptr)
 247                         goto err_no_space;
 248
 249                 /* fill nops, roll back and start at position 0 */
 250                 while (wptr > 0) {
 251                         queue_address[wptr] = kq->nop_packet;
 252                         wptr = (wptr + 1) % queue_size_dwords;
 253                         wptr64++;
 254                 }
 255         }
 256
 257         *buffer_ptr = &queue_address[wptr];
 258         kq->pending_wptr = wptr + packet_size_in_dwords;
 259         kq->pending_wptr64 = wptr64 + packet_size_in_dwords;
 260
 261         return 0;
 262
 263 err_no_space:
 264         *buffer_ptr = NULL;
 265         return -ENOMEM;
 266 }
 267
 268 static void submit_packet(struct kernel_queue *kq)
 269 {
 270 #ifdef DEBUG
 271         int i;
 272
 273         for (i = *kq->wptr_kernel; i < kq->pending_wptr; i++) {
 274                 pr_debug("0x%2X ", kq->pq_kernel_addr[i]);
 275                 if (i % 15 == 0)
 276                         pr_debug("\n");
 277         }
 278         pr_debug("\n");
 279 #endif
 280
 281         kq->ops_asic_specific.submit_packet(kq);
 282 }
 283
 284 static void rollback_packet(struct kernel_queue *kq)
 285 {
 286         if (kq->dev->device_info->doorbell_size == 8) {
 287                 kq->pending_wptr64 = *kq->wptr64_kernel;
 288                 kq->pending_wptr = *kq->wptr_kernel %
 289                         (kq->queue->properties.queue_size / 4);
 290         } else {
 291                 kq->pending_wptr = *kq->wptr_kernel;
 292         }
 293 }
 294
 295 struct kernel_queue *kernel_queue_init(struct kfd_dev *dev,
 296                                         enum kfd_queue_type type)
 297 {
 298         struct kernel_queue *kq;
 299
 300         kq = kzalloc(sizeof(*kq), GFP_KERNEL);
 301         if (!kq)
 302                 return NULL;
 303
 304         kq->ops.initialize = initialize;
 305         kq->ops.uninitialize = uninitialize;
 306         kq->ops.acquire_packet_buffer = acquire_packet_buffer;
 307         kq->ops.submit_packet = submit_packet;
 308         kq->ops.rollback_packet = rollback_packet;
 309
 310         switch (dev->device_info->asic_family) {
 311         case CHIP_CARRIZO:
 312         case CHIP_TONGA:
 313         case CHIP_FIJI:
 314         case CHIP_POLARIS10:
 315         case CHIP_POLARIS11:
 316                 kernel_queue_init_vi(&kq->ops_asic_specific);
 317                 break;
 318
 319         case CHIP_KAVERI:
 320         case CHIP_HAWAII:
 321                 kernel_queue_init_cik(&kq->ops_asic_specific);
 322                 break;
 323
 324         case CHIP_VEGA10:
 325         case CHIP_RAVEN:
 326                 kernel_queue_init_v9(&kq->ops_asic_specific);
 327                 break;
 328         default:
 329                 WARN(1, "Unexpected ASIC family %u",
 330                      dev->device_info->asic_family);
 331                 goto out_free;
 332         }
 333
 334         if (kq->ops.initialize(kq, dev, type, KFD_KERNEL_QUEUE_SIZE))
 335                 return kq;
 336
 337         pr_err("Failed to init kernel queue\n");
 338
 339 out_free:
 340         kfree(kq);
 341         return NULL;
 342 }
 343
 344 void kernel_queue_uninit(struct kernel_queue *kq)
 345 {
 346         kq->ops.uninitialize(kq);
 347         kfree(kq);
 348 }
 349
 350 /* FIXME: Can this test be removed? */
 351 static __attribute__((unused)) void test_kq(struct kfd_dev *dev)
 352 {
 353         struct kernel_queue *kq;
 354         uint32_t *buffer, i;
 355         int retval;
 356
 357         pr_err("Starting kernel queue test\n");
 358
 359         kq = kernel_queue_init(dev, KFD_QUEUE_TYPE_HIQ);
 360         if (unlikely(!kq)) {
 361                 pr_err("  Failed to initialize HIQ\n");
 362                 pr_err("Kernel queue test failed\n");
 363                 return;
 364         }
 365
 366         retval = kq->ops.acquire_packet_buffer(kq, 5, &buffer);
 367         if (unlikely(retval != 0)) {
 368                 pr_err("  Failed to acquire packet buffer\n");
 369                 pr_err("Kernel queue test failed\n");
 370                 return;
 371         }
 372         for (i = 0; i < 5; i++)
 373                 buffer[i] = kq->nop_packet;
 374         kq->ops.submit_packet(kq);
 375
 376         pr_err("Ending kernel queue test\n");
 377 }
 378
 379