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         BUG_ON(!kq || !dev);
  45         BUG_ON(type != KFD_QUEUE_TYPE_DIQ && type != KFD_QUEUE_TYPE_HIQ);
  46
  47         pr_debug("amdkfd: In func %s initializing queue type %d size %d\n",
  48                         __func__, KFD_QUEUE_TYPE_HIQ, 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                 BUG();
  67                 break;
  68         }
  69
  70         if (kq->mqd == NULL)
  71                 return false;
  72
  73         prop.doorbell_ptr = kfd_get_kernel_doorbell(dev, &prop.doorbell_off);
  74
  75         if (prop.doorbell_ptr == NULL) {
  76                 pr_err("amdkfd: error init 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("amdkfd: error 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 == false)
  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, sizeof(*kq->wptr_kernel),
 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, NULL);
 147         } else {
 148                 /* allocate fence for DIQ */
 149
 150                 retval = kfd_gtt_sa_allocate(dev, sizeof(uint32_t),
 151                                                 &kq->fence_mem_obj);
 152
 153                 if (retval != 0)
 154                         goto err_alloc_fence;
 155
 156                 kq->fence_kernel_address = kq->fence_mem_obj->cpu_ptr;
 157                 kq->fence_gpu_addr = kq->fence_mem_obj->gpu_addr;
 158         }
 159
 160         print_queue(kq->queue);
 161
 162         return true;
 163 err_alloc_fence:
 164 err_init_mqd:
 165         uninit_queue(kq->queue);
 166 err_init_queue:
 167         kfd_gtt_sa_free(dev, kq->wptr_mem);
 168 err_wptr_allocate_vidmem:
 169         kfd_gtt_sa_free(dev, kq->rptr_mem);
 170 err_rptr_allocate_vidmem:
 171         kfd_gtt_sa_free(dev, kq->eop_mem);
 172 err_eop_allocate_vidmem:
 173         kfd_gtt_sa_free(dev, kq->pq);
 174 err_pq_allocate_vidmem:
 175         kfd_release_kernel_doorbell(dev, prop.doorbell_ptr);
 176 err_get_kernel_doorbell:
 177         return false;
 178
 179 }
 180
 181 static void uninitialize(struct kernel_queue *kq)
 182 {
 183         BUG_ON(!kq);
 184
 185         if (kq->queue->properties.type == KFD_QUEUE_TYPE_HIQ)
 186                 kq->mqd->destroy_mqd(kq->mqd,
 187                                         NULL,
 188                                         false,
 189                                         QUEUE_PREEMPT_DEFAULT_TIMEOUT_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->uninit_mqd(kq->mqd, kq->queue->mqd, kq->queue->mqd_mem_obj);
 196
 197         kfd_gtt_sa_free(kq->dev, kq->rptr_mem);
 198         kfd_gtt_sa_free(kq->dev, kq->wptr_mem);
 199         kq->ops_asic_specific.uninitialize(kq);
 200         kfd_gtt_sa_free(kq->dev, kq->pq);
 201         kfd_release_kernel_doorbell(kq->dev,
 202                                         kq->queue->properties.doorbell_ptr);
 203         uninit_queue(kq->queue);
 204 }
 205
 206 static int acquire_packet_buffer(struct kernel_queue *kq,
 207                 size_t packet_size_in_dwords, unsigned int **buffer_ptr)
 208 {
 209         size_t available_size;
 210         size_t queue_size_dwords;
 211         uint32_t wptr, rptr;
 212         unsigned int *queue_address;
 213
 214         BUG_ON(!kq || !buffer_ptr);
 215
 216         rptr = *kq->rptr_kernel;
 217         wptr = *kq->wptr_kernel;
 218         queue_address = (unsigned int *)kq->pq_kernel_addr;
 219         queue_size_dwords = kq->queue->properties.queue_size / sizeof(uint32_t);
 220
 221         pr_debug("rptr: %d\n", rptr);
 222         pr_debug("wptr: %d\n", wptr);
 223         pr_debug("queue_address 0x%p\n", queue_address);
 224
 225         available_size = (rptr - 1 - wptr + queue_size_dwords) %
 226                                                         queue_size_dwords;
 227
 228         if (packet_size_in_dwords >= queue_size_dwords ||
 229                         packet_size_in_dwords >= available_size) {
 230                 /*
 231                  * make sure calling functions know
 232                  * acquire_packet_buffer() failed
 233                  */
 234                 *buffer_ptr = NULL;
 235                 return -ENOMEM;
 236         }
 237
 238         if (wptr + packet_size_in_dwords >= queue_size_dwords) {
 239                 while (wptr > 0) {
 240                         queue_address[wptr] = kq->nop_packet;
 241                         wptr = (wptr + 1) % queue_size_dwords;
 242                 }
 243         }
 244
 245         *buffer_ptr = &queue_address[wptr];
 246         kq->pending_wptr = wptr + packet_size_in_dwords;
 247
 248         return 0;
 249 }
 250
 251 static void submit_packet(struct kernel_queue *kq)
 252 {
 253 #ifdef DEBUG
 254         int i;
 255 #endif
 256
 257         BUG_ON(!kq);
 258
 259 #ifdef DEBUG
 260         for (i = *kq->wptr_kernel; i < kq->pending_wptr; i++) {
 261                 pr_debug("0x%2X ", kq->pq_kernel_addr[i]);
 262                 if (i % 15 == 0)
 263                         pr_debug("\n");
 264         }
 265         pr_debug("\n");
 266 #endif
 267
 268         *kq->wptr_kernel = kq->pending_wptr;
 269         write_kernel_doorbell(kq->queue->properties.doorbell_ptr,
 270                                 kq->pending_wptr);
 271 }
 272
 273 static void rollback_packet(struct kernel_queue *kq)
 274 {
 275         BUG_ON(!kq);
 276         kq->pending_wptr = *kq->queue->properties.write_ptr;
 277 }
 278
 279 struct kernel_queue *kernel_queue_init(struct kfd_dev *dev,
 280                                         enum kfd_queue_type type)
 281 {
 282         struct kernel_queue *kq;
 283
 284         BUG_ON(!dev);
 285
 286         kq = kzalloc(sizeof(struct kernel_queue), GFP_KERNEL);
 287         if (!kq)
 288                 return NULL;
 289
 290         kq->ops.initialize = initialize;
 291         kq->ops.uninitialize = uninitialize;
 292         kq->ops.acquire_packet_buffer = acquire_packet_buffer;
 293         kq->ops.submit_packet = submit_packet;
 294         kq->ops.rollback_packet = rollback_packet;
 295
 296         switch (dev->device_info->asic_family) {
 297         case CHIP_CARRIZO:
 298                 kernel_queue_init_vi(&kq->ops_asic_specific);
 299                 break;
 300
 301         case CHIP_KAVERI:
 302                 kernel_queue_init_cik(&kq->ops_asic_specific);
 303                 break;
 304         }
 305
 306         if (!kq->ops.initialize(kq, dev, type, KFD_KERNEL_QUEUE_SIZE)) {
 307                 pr_err("amdkfd: failed to init kernel queue\n");
 308                 kfree(kq);
 309                 return NULL;
 310         }
 311         return kq;
 312 }
 313
 314 void kernel_queue_uninit(struct kernel_queue *kq)
 315 {
 316         BUG_ON(!kq);
 317
 318         kq->ops.uninitialize(kq);
 319         kfree(kq);
 320 }
 321
 322 static __attribute__((unused)) void test_kq(struct kfd_dev *dev)
 323 {
 324         struct kernel_queue *kq;
 325         uint32_t *buffer, i;
 326         int retval;
 327
 328         BUG_ON(!dev);
 329
 330         pr_err("amdkfd: starting kernel queue test\n");
 331
 332         kq = kernel_queue_init(dev, KFD_QUEUE_TYPE_HIQ);
 333         BUG_ON(!kq);
 334
 335         retval = kq->ops.acquire_packet_buffer(kq, 5, &buffer);
 336         BUG_ON(retval != 0);
 337         for (i = 0; i < 5; i++)
 338                 buffer[i] = kq->nop_packet;
 339         kq->ops.submit_packet(kq);
 340
 341         pr_err("amdkfd: ending kernel queue test\n");
 342 }
 343
 344