drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.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 #include "amdgpu_amdkfd.h"
  24 #include "amd_shared.h"
  25 #include <drm/drmP.h>
  26 #include "amdgpu.h"
  27 #include "amdgpu_gfx.h"
  28 #include <linux/module.h>
  29
  30 const struct kfd2kgd_calls *kfd2kgd;
  31 const struct kgd2kfd_calls *kgd2kfd;
  32 bool (*kgd2kfd_init_p)(unsigned, const struct kgd2kfd_calls**);
  33
  34 int amdgpu_amdkfd_init(void)
  35 {
  36         int ret;
  37
  38 #if defined(CONFIG_HSA_AMD_MODULE)
  39         int (*kgd2kfd_init_p)(unsigned, const struct kgd2kfd_calls**);
  40
  41         kgd2kfd_init_p = symbol_request(kgd2kfd_init);
  42
  43         if (kgd2kfd_init_p == NULL)
  44                 return -ENOENT;
  45
  46         ret = kgd2kfd_init_p(KFD_INTERFACE_VERSION, &kgd2kfd);
  47         if (ret) {
  48                 symbol_put(kgd2kfd_init);
  49                 kgd2kfd = NULL;
  50         }
  51
  52 #elif defined(CONFIG_HSA_AMD)
  53         ret = kgd2kfd_init(KFD_INTERFACE_VERSION, &kgd2kfd);
  54         if (ret)
  55                 kgd2kfd = NULL;
  56
  57 #else
  58         ret = -ENOENT;
  59 #endif
  60
  61         return ret;
  62 }
  63
  64 bool amdgpu_amdkfd_load_interface(struct amdgpu_device *adev)
  65 {
  66         switch (adev->asic_type) {
  67 #ifdef CONFIG_DRM_AMDGPU_CIK
  68         case CHIP_KAVERI:
  69                 kfd2kgd = amdgpu_amdkfd_gfx_7_get_functions();
  70                 break;
  71 #endif
  72         case CHIP_CARRIZO:
  73                 kfd2kgd = amdgpu_amdkfd_gfx_8_0_get_functions();
  74                 break;
  75         default:
  76                 return false;
  77         }
  78
  79         return true;
  80 }
  81
  82 void amdgpu_amdkfd_fini(void)
  83 {
  84         if (kgd2kfd) {
  85                 kgd2kfd->exit();
  86                 symbol_put(kgd2kfd_init);
  87         }
  88 }
  89
  90 void amdgpu_amdkfd_device_probe(struct amdgpu_device *adev)
  91 {
  92         if (kgd2kfd)
  93                 adev->kfd = kgd2kfd->probe((struct kgd_dev *)adev,
  94                                         adev->pdev, kfd2kgd);
  95 }
  96
  97 void amdgpu_amdkfd_device_init(struct amdgpu_device *adev)
  98 {
  99         int i;
 100         int last_valid_bit;
 101         if (adev->kfd) {
 102                 struct kgd2kfd_shared_resources gpu_resources = {
 103                         .compute_vmid_bitmap = 0xFF00,
 104                         .num_mec = adev->gfx.mec.num_mec,
 105                         .num_pipe_per_mec = adev->gfx.mec.num_pipe_per_mec,
 106                         .num_queue_per_pipe = adev->gfx.mec.num_queue_per_pipe
 107                 };
 108
 109                 /* this is going to have a few of the MSBs set that we need to
 110                  * clear */
 111                 bitmap_complement(gpu_resources.queue_bitmap,
 112                                   adev->gfx.mec.queue_bitmap,
 113                                   KGD_MAX_QUEUES);
 114
 115                 /* remove the KIQ bit as well */
 116                 if (adev->gfx.kiq.ring.ready)
 117                         clear_bit(amdgpu_gfx_queue_to_bit(adev,
 118                                                           adev->gfx.kiq.ring.me - 1,
 119                                                           adev->gfx.kiq.ring.pipe,
 120                                                           adev->gfx.kiq.ring.queue),
 121                                   gpu_resources.queue_bitmap);
 122
 123                 /* According to linux/bitmap.h we shouldn't use bitmap_clear if
 124                  * nbits is not compile time constant */
 125                 last_valid_bit = adev->gfx.mec.num_mec
 126                                 * adev->gfx.mec.num_pipe_per_mec
 127                                 * adev->gfx.mec.num_queue_per_pipe;
 128                 for (i = last_valid_bit; i < KGD_MAX_QUEUES; ++i)
 129                         clear_bit(i, gpu_resources.queue_bitmap);
 130
 131                 amdgpu_doorbell_get_kfd_info(adev,
 132                                 &gpu_resources.doorbell_physical_address,
 133                                 &gpu_resources.doorbell_aperture_size,
 134                                 &gpu_resources.doorbell_start_offset);
 135
 136                 kgd2kfd->device_init(adev->kfd, &gpu_resources);
 137         }
 138 }
 139
 140 void amdgpu_amdkfd_device_fini(struct amdgpu_device *adev)
 141 {
 142         if (adev->kfd) {
 143                 kgd2kfd->device_exit(adev->kfd);
 144                 adev->kfd = NULL;
 145         }
 146 }
 147
 148 void amdgpu_amdkfd_interrupt(struct amdgpu_device *adev,
 149                 const void *ih_ring_entry)
 150 {
 151         if (adev->kfd)
 152                 kgd2kfd->interrupt(adev->kfd, ih_ring_entry);
 153 }
 154
 155 void amdgpu_amdkfd_suspend(struct amdgpu_device *adev)
 156 {
 157         if (adev->kfd)
 158                 kgd2kfd->suspend(adev->kfd);
 159 }
 160
 161 int amdgpu_amdkfd_resume(struct amdgpu_device *adev)
 162 {
 163         int r = 0;
 164
 165         if (adev->kfd)
 166                 r = kgd2kfd->resume(adev->kfd);
 167
 168         return r;
 169 }
 170
 171 int alloc_gtt_mem(struct kgd_dev *kgd, size_t size,
 172                         void **mem_obj, uint64_t *gpu_addr,
 173                         void **cpu_ptr)
 174 {
 175         struct amdgpu_device *adev = (struct amdgpu_device *)kgd;
 176         struct kgd_mem **mem = (struct kgd_mem **) mem_obj;
 177         int r;
 178
 179         BUG_ON(kgd == NULL);
 180         BUG_ON(gpu_addr == NULL);
 181         BUG_ON(cpu_ptr == NULL);
 182
 183         *mem = kmalloc(sizeof(struct kgd_mem), GFP_KERNEL);
 184         if ((*mem) == NULL)
 185                 return -ENOMEM;
 186
 187         r = amdgpu_bo_create(adev, size, PAGE_SIZE, true, AMDGPU_GEM_DOMAIN_GTT,
 188                              AMDGPU_GEM_CREATE_CPU_GTT_USWC, NULL, NULL, &(*mem)->bo);
 189         if (r) {
 190                 dev_err(adev->dev,
 191                         "failed to allocate BO for amdkfd (%d)\n", r);
 192                 return r;
 193         }
 194
 195         /* map the buffer */
 196         r = amdgpu_bo_reserve((*mem)->bo, true);
 197         if (r) {
 198                 dev_err(adev->dev, "(%d) failed to reserve bo for amdkfd\n", r);
 199                 goto allocate_mem_reserve_bo_failed;
 200         }
 201
 202         r = amdgpu_bo_pin((*mem)->bo, AMDGPU_GEM_DOMAIN_GTT,
 203                                 &(*mem)->gpu_addr);
 204         if (r) {
 205                 dev_err(adev->dev, "(%d) failed to pin bo for amdkfd\n", r);
 206                 goto allocate_mem_pin_bo_failed;
 207         }
 208         *gpu_addr = (*mem)->gpu_addr;
 209
 210         r = amdgpu_bo_kmap((*mem)->bo, &(*mem)->cpu_ptr);
 211         if (r) {
 212                 dev_err(adev->dev,
 213                         "(%d) failed to map bo to kernel for amdkfd\n", r);
 214                 goto allocate_mem_kmap_bo_failed;
 215         }
 216         *cpu_ptr = (*mem)->cpu_ptr;
 217
 218         amdgpu_bo_unreserve((*mem)->bo);
 219
 220         return 0;
 221
 222 allocate_mem_kmap_bo_failed:
 223         amdgpu_bo_unpin((*mem)->bo);
 224 allocate_mem_pin_bo_failed:
 225         amdgpu_bo_unreserve((*mem)->bo);
 226 allocate_mem_reserve_bo_failed:
 227         amdgpu_bo_unref(&(*mem)->bo);
 228
 229         return r;
 230 }
 231
 232 void free_gtt_mem(struct kgd_dev *kgd, void *mem_obj)
 233 {
 234         struct kgd_mem *mem = (struct kgd_mem *) mem_obj;
 235
 236         BUG_ON(mem == NULL);
 237
 238         amdgpu_bo_reserve(mem->bo, true);
 239         amdgpu_bo_kunmap(mem->bo);
 240         amdgpu_bo_unpin(mem->bo);
 241         amdgpu_bo_unreserve(mem->bo);
 242         amdgpu_bo_unref(&(mem->bo));
 243         kfree(mem);
 244 }
 245
 246 uint64_t get_vmem_size(struct kgd_dev *kgd)
 247 {
 248         struct amdgpu_device *adev =
 249                 (struct amdgpu_device *)kgd;
 250
 251         BUG_ON(kgd == NULL);
 252
 253         return adev->mc.real_vram_size;
 254 }
 255
 256 uint64_t get_gpu_clock_counter(struct kgd_dev *kgd)
 257 {
 258         struct amdgpu_device *adev = (struct amdgpu_device *)kgd;
 259
 260         if (adev->gfx.funcs->get_gpu_clock_counter)
 261                 return adev->gfx.funcs->get_gpu_clock_counter(adev);
 262         return 0;
 263 }
 264
 265 uint32_t get_max_engine_clock_in_mhz(struct kgd_dev *kgd)
 266 {
 267         struct amdgpu_device *adev = (struct amdgpu_device *)kgd;
 268
 269         /* The sclk is in quantas of 10kHz */
 270         return adev->pm.dpm.dyn_state.max_clock_voltage_on_ac.sclk / 100;
 271 }