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("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