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 "kfd_kernel_queue.h"
  29 #include "kfd_priv.h"
  30 #include "kfd_device_queue_manager.h"
  31 #include "kfd_pm4_headers.h"
  32 #include "kfd_pm4_opcodes.h"
  33
  34 #define PM4_COUNT_ZERO (((1 << 15) - 1) << 16)
  35
  36 static bool initialize(struct kernel_queue *kq, struct kfd_dev *dev,
  37                 enum kfd_queue_type type, unsigned int queue_size)
  38 {
  39         struct queue_properties prop;
  40         int retval;
  41         union PM4_MES_TYPE_3_HEADER nop;
  42
  43         BUG_ON(!kq || !dev);
  44         BUG_ON(type != KFD_QUEUE_TYPE_DIQ && type != KFD_QUEUE_TYPE_HIQ);
  45
  46         pr_debug("kfd: In func %s initializing queue type %d size %d\n",
  47                         __func__, KFD_QUEUE_TYPE_HIQ, queue_size);
  48
  49         nop.opcode = IT_NOP;
  50         nop.type = PM4_TYPE_3;
  51         nop.u32all |= PM4_COUNT_ZERO;
  52
  53         kq->dev = dev;
  54         kq->nop_packet = nop.u32all;
  55         switch (type) {
  56         case KFD_QUEUE_TYPE_DIQ:
  57         case KFD_QUEUE_TYPE_HIQ:
  58                 kq->mqd = dev->dqm->get_mqd_manager(dev->dqm,
  59                                                 KFD_MQD_TYPE_CIK_HIQ);
  60                 break;
  61         default:
  62                 BUG();
  63                 break;
  64         }
  65
  66         if (kq->mqd == NULL)
  67                 return false;
  68
  69         prop.doorbell_ptr = kfd_get_kernel_doorbell(dev, &prop.doorbell_off);
  70
  71         if (prop.doorbell_ptr == NULL)
  72                 goto err_get_kernel_doorbell;
  73
  74         retval = kfd2kgd->allocate_mem(dev->kgd,
  75                                         queue_size,
  76                                         PAGE_SIZE,
  77                                         KFD_MEMPOOL_SYSTEM_WRITECOMBINE,
  78                                         (struct kgd_mem **) &kq->pq);
  79
  80         if (retval != 0)
  81                 goto err_pq_allocate_vidmem;
  82
  83         kq->pq_kernel_addr = kq->pq->cpu_ptr;
  84         kq->pq_gpu_addr = kq->pq->gpu_addr;
  85
  86         retval = kfd2kgd->allocate_mem(dev->kgd,
  87                                         sizeof(*kq->rptr_kernel),
  88                                         32,
  89                                         KFD_MEMPOOL_SYSTEM_WRITECOMBINE,
  90                                         (struct kgd_mem **) &kq->rptr_mem);
  91
  92         if (retval != 0)
  93                 goto err_rptr_allocate_vidmem;
  94
  95         kq->rptr_kernel = kq->rptr_mem->cpu_ptr;
  96         kq->rptr_gpu_addr = kq->rptr_mem->gpu_addr;
  97
  98         retval = kfd2kgd->allocate_mem(dev->kgd,
  99                                         sizeof(*kq->wptr_kernel),
 100                                         32,
 101                                         KFD_MEMPOOL_SYSTEM_WRITECOMBINE,
 102                                         (struct kgd_mem **) &kq->wptr_mem);
 103
 104         if (retval != 0)
 105                 goto err_wptr_allocate_vidmem;
 106
 107         kq->wptr_kernel = kq->wptr_mem->cpu_ptr;
 108         kq->wptr_gpu_addr = kq->wptr_mem->gpu_addr;
 109
 110         memset(kq->pq_kernel_addr, 0, queue_size);
 111         memset(kq->rptr_kernel, 0, sizeof(*kq->rptr_kernel));
 112         memset(kq->wptr_kernel, 0, sizeof(*kq->wptr_kernel));
 113
 114         prop.queue_size = queue_size;
 115         prop.is_interop = false;
 116         prop.priority = 1;
 117         prop.queue_percent = 100;
 118         prop.type = type;
 119         prop.vmid = 0;
 120         prop.queue_address = kq->pq_gpu_addr;
 121         prop.read_ptr = (uint32_t *) kq->rptr_gpu_addr;
 122         prop.write_ptr = (uint32_t *) kq->wptr_gpu_addr;
 123
 124         if (init_queue(&kq->queue, prop) != 0)
 125                 goto err_init_queue;
 126
 127         kq->queue->device = dev;
 128         kq->queue->process = kfd_get_process(current);
 129
 130         retval = kq->mqd->init_mqd(kq->mqd, &kq->queue->mqd,
 131                                         &kq->queue->mqd_mem_obj,
 132                                         &kq->queue->gart_mqd_addr,
 133                                         &kq->queue->properties);
 134         if (retval != 0)
 135                 goto err_init_mqd;
 136
 137         /* assign HIQ to HQD */
 138         if (type == KFD_QUEUE_TYPE_HIQ) {
 139                 pr_debug("assigning hiq to hqd\n");
 140                 kq->queue->pipe = KFD_CIK_HIQ_PIPE;
 141                 kq->queue->queue = KFD_CIK_HIQ_QUEUE;
 142                 kq->mqd->load_mqd(kq->mqd, kq->queue->mqd, kq->queue->pipe,
 143                                         kq->queue->queue, NULL);
 144         } else {
 145                 /* allocate fence for DIQ */
 146
 147                 retval = kfd2kgd->allocate_mem(dev->kgd,
 148                                         sizeof(uint32_t),
 149                                         32,
 150                                         KFD_MEMPOOL_SYSTEM_WRITECOMBINE,
 151                                         (struct kgd_mem **) &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         kfd2kgd->free_mem(dev->kgd, (struct kgd_mem *) kq->wptr_mem);
 168 err_wptr_allocate_vidmem:
 169         kfd2kgd->free_mem(dev->kgd, (struct kgd_mem *) kq->rptr_mem);
 170 err_rptr_allocate_vidmem:
 171         kfd2kgd->free_mem(dev->kgd, (struct kgd_mem *) kq->pq);
 172 err_pq_allocate_vidmem:
 173         pr_err("kfd: error init pq\n");
 174         kfd_release_kernel_doorbell(dev, prop.doorbell_ptr);
 175 err_get_kernel_doorbell:
 176         pr_err("kfd: error init 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
 193         kfd2kgd->free_mem(kq->dev->kgd, (struct kgd_mem *) kq->rptr_mem);
 194         kfd2kgd->free_mem(kq->dev->kgd, (struct kgd_mem *) kq->wptr_mem);
 195         kfd2kgd->free_mem(kq->dev->kgd, (struct kgd_mem *) kq->pq);
 196         kfd_release_kernel_doorbell(kq->dev,
 197                                         kq->queue->properties.doorbell_ptr);
 198         uninit_queue(kq->queue);
 199 }
 200
 201 static int acquire_packet_buffer(struct kernel_queue *kq,
 202                 size_t packet_size_in_dwords, unsigned int **buffer_ptr)
 203 {
 204         size_t available_size;
 205         size_t queue_size_dwords;
 206         uint32_t wptr, rptr;
 207         unsigned int *queue_address;
 208
 209         BUG_ON(!kq || !buffer_ptr);
 210
 211         rptr = *kq->rptr_kernel;
 212         wptr = *kq->wptr_kernel;
 213         queue_address = (unsigned int *)kq->pq_kernel_addr;
 214         queue_size_dwords = kq->queue->properties.queue_size / sizeof(uint32_t);
 215
 216         pr_debug("kfd: In func %s\nrptr: %d\nwptr: %d\nqueue_address 0x%p\n",
 217                         __func__, rptr, wptr, queue_address);
 218
 219         available_size = (rptr - 1 - wptr + queue_size_dwords) %
 220                                                         queue_size_dwords;
 221
 222         if (packet_size_in_dwords >= queue_size_dwords ||
 223                         packet_size_in_dwords >= available_size)
 224                 return -ENOMEM;
 225
 226         if (wptr + packet_size_in_dwords >= queue_size_dwords) {
 227                 while (wptr > 0) {
 228                         queue_address[wptr] = kq->nop_packet;
 229                         wptr = (wptr + 1) % queue_size_dwords;
 230                 }
 231         }
 232
 233         *buffer_ptr = &queue_address[wptr];
 234         kq->pending_wptr = wptr + packet_size_in_dwords;
 235
 236         return 0;
 237 }
 238
 239 static void submit_packet(struct kernel_queue *kq)
 240 {
 241 #ifdef DEBUG
 242         int i;
 243 #endif
 244
 245         BUG_ON(!kq);
 246
 247 #ifdef DEBUG
 248         for (i = *kq->wptr_kernel; i < kq->pending_wptr; i++) {
 249                 pr_debug("0x%2X ", kq->pq_kernel_addr[i]);
 250                 if (i % 15 == 0)
 251                         pr_debug("\n");
 252         }
 253         pr_debug("\n");
 254 #endif
 255
 256         *kq->wptr_kernel = kq->pending_wptr;
 257         write_kernel_doorbell(kq->queue->properties.doorbell_ptr,
 258                                 kq->pending_wptr);
 259 }
 260
 261 static int sync_with_hw(struct kernel_queue *kq, unsigned long timeout_ms)
 262 {
 263         unsigned long org_timeout_ms;
 264
 265         BUG_ON(!kq);
 266
 267         org_timeout_ms = timeout_ms;
 268         timeout_ms += jiffies * 1000 / HZ;
 269         while (*kq->wptr_kernel != *kq->rptr_kernel) {
 270                 if (time_after(jiffies * 1000 / HZ, timeout_ms)) {
 271                         pr_err("kfd: kernel_queue %s timeout expired %lu\n",
 272                                 __func__, org_timeout_ms);
 273                         pr_err("kfd: wptr: %d rptr: %d\n",
 274                                 *kq->wptr_kernel, *kq->rptr_kernel);
 275                         return -ETIME;
 276                 }
 277                 cpu_relax();
 278         }
 279
 280         return 0;
 281 }
 282
 283 static void rollback_packet(struct kernel_queue *kq)
 284 {
 285         BUG_ON(!kq);
 286         kq->pending_wptr = *kq->queue->properties.write_ptr;
 287 }
 288
 289 struct kernel_queue *kernel_queue_init(struct kfd_dev *dev,
 290                                         enum kfd_queue_type type)
 291 {
 292         struct kernel_queue *kq;
 293
 294         BUG_ON(!dev);
 295
 296         kq = kzalloc(sizeof(struct kernel_queue), GFP_KERNEL);
 297         if (!kq)
 298                 return NULL;
 299
 300         kq->initialize = initialize;
 301         kq->uninitialize = uninitialize;
 302         kq->acquire_packet_buffer = acquire_packet_buffer;
 303         kq->submit_packet = submit_packet;
 304         kq->sync_with_hw = sync_with_hw;
 305         kq->rollback_packet = rollback_packet;
 306
 307         if (kq->initialize(kq, dev, type, KFD_KERNEL_QUEUE_SIZE) == false) {
 308                 pr_err("kfd: failed to init kernel queue\n");
 309                 kfree(kq);
 310                 return NULL;
 311         }
 312         return kq;
 313 }
 314
 315 void kernel_queue_uninit(struct kernel_queue *kq)
 316 {
 317         BUG_ON(!kq);
 318
 319         kq->uninitialize(kq);
 320         kfree(kq);
 321 }
 322
 323 static __attribute__((unused)) void test_kq(struct kfd_dev *dev)
 324 {
 325         struct kernel_queue *kq;
 326         uint32_t *buffer, i;
 327         int retval;
 328
 329         BUG_ON(!dev);
 330
 331         pr_debug("kfd: starting kernel queue test\n");
 332
 333         kq = kernel_queue_init(dev, KFD_QUEUE_TYPE_HIQ);
 334         BUG_ON(!kq);
 335
 336         retval = kq->acquire_packet_buffer(kq, 5, &buffer);
 337         BUG_ON(retval != 0);
 338         for (i = 0; i < 5; i++)
 339                 buffer[i] = kq->nop_packet;
 340         kq->submit_packet(kq);
 341         kq->sync_with_hw(kq, 1000);
 342
 343         pr_debug("kfd: ending kernel queue test\n");
 344 }
 345
 346