drivers/gpu/drm/amd/amdkfd/kfd_device.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 <linux/amd-iommu.h>
  24 #include <linux/bsearch.h>
  25 #include <linux/pci.h>
  26 #include <linux/slab.h>
  27 #include "kfd_priv.h"
  28 #include "kfd_device_queue_manager.h"
  29 #include "kfd_pm4_headers.h"
  30
  31 #define MQD_SIZE_ALIGNED 768
  32
  33 static const struct kfd_device_info kaveri_device_info = {
  34         .max_pasid_bits = 16,
  35         .ih_ring_entry_size = 4 * sizeof(uint32_t),
  36         .mqd_size_aligned = MQD_SIZE_ALIGNED
  37 };
  38
  39 struct kfd_deviceid {
  40         unsigned short did;
  41         const struct kfd_device_info *device_info;
  42 };
  43
  44 /* Please keep this sorted by increasing device id. */
  45 static const struct kfd_deviceid supported_devices[] = {
  46         { 0x1304, &kaveri_device_info },        /* Kaveri */
  47         { 0x1305, &kaveri_device_info },        /* Kaveri */
  48         { 0x1306, &kaveri_device_info },        /* Kaveri */
  49         { 0x1307, &kaveri_device_info },        /* Kaveri */
  50         { 0x1309, &kaveri_device_info },        /* Kaveri */
  51         { 0x130A, &kaveri_device_info },        /* Kaveri */
  52         { 0x130B, &kaveri_device_info },        /* Kaveri */
  53         { 0x130C, &kaveri_device_info },        /* Kaveri */
  54         { 0x130D, &kaveri_device_info },        /* Kaveri */
  55         { 0x130E, &kaveri_device_info },        /* Kaveri */
  56         { 0x130F, &kaveri_device_info },        /* Kaveri */
  57         { 0x1310, &kaveri_device_info },        /* Kaveri */
  58         { 0x1311, &kaveri_device_info },        /* Kaveri */
  59         { 0x1312, &kaveri_device_info },        /* Kaveri */
  60         { 0x1313, &kaveri_device_info },        /* Kaveri */
  61         { 0x1315, &kaveri_device_info },        /* Kaveri */
  62         { 0x1316, &kaveri_device_info },        /* Kaveri */
  63         { 0x1317, &kaveri_device_info },        /* Kaveri */
  64         { 0x1318, &kaveri_device_info },        /* Kaveri */
  65         { 0x131B, &kaveri_device_info },        /* Kaveri */
  66         { 0x131C, &kaveri_device_info },        /* Kaveri */
  67         { 0x131D, &kaveri_device_info },        /* Kaveri */
  68 };
  69
  70 static const struct kfd_device_info *lookup_device_info(unsigned short did)
  71 {
  72         size_t i;
  73
  74         for (i = 0; i < ARRAY_SIZE(supported_devices); i++) {
  75                 if (supported_devices[i].did == did) {
  76                         BUG_ON(supported_devices[i].device_info == NULL);
  77                         return supported_devices[i].device_info;
  78                 }
  79         }
  80
  81         return NULL;
  82 }
  83
  84 struct kfd_dev *kgd2kfd_probe(struct kgd_dev *kgd, struct pci_dev *pdev)
  85 {
  86         struct kfd_dev *kfd;
  87
  88         const struct kfd_device_info *device_info =
  89                                         lookup_device_info(pdev->device);
  90
  91         if (!device_info)
  92                 return NULL;
  93
  94         kfd = kzalloc(sizeof(*kfd), GFP_KERNEL);
  95         if (!kfd)
  96                 return NULL;
  97
  98         kfd->kgd = kgd;
  99         kfd->device_info = device_info;
 100         kfd->pdev = pdev;
 101         kfd->init_complete = false;
 102
 103         return kfd;
 104 }
 105
 106 static bool device_iommu_pasid_init(struct kfd_dev *kfd)
 107 {
 108         const u32 required_iommu_flags = AMD_IOMMU_DEVICE_FLAG_ATS_SUP |
 109                                         AMD_IOMMU_DEVICE_FLAG_PRI_SUP |
 110                                         AMD_IOMMU_DEVICE_FLAG_PASID_SUP;
 111
 112         struct amd_iommu_device_info iommu_info;
 113         unsigned int pasid_limit;
 114         int err;
 115
 116         err = amd_iommu_device_info(kfd->pdev, &iommu_info);
 117         if (err < 0) {
 118                 dev_err(kfd_device,
 119                         "error getting iommu info. is the iommu enabled?\n");
 120                 return false;
 121         }
 122
 123         if ((iommu_info.flags & required_iommu_flags) != required_iommu_flags) {
 124                 dev_err(kfd_device, "error required iommu flags ats(%i), pri(%i), pasid(%i)\n",
 125                        (iommu_info.flags & AMD_IOMMU_DEVICE_FLAG_ATS_SUP) != 0,
 126                        (iommu_info.flags & AMD_IOMMU_DEVICE_FLAG_PRI_SUP) != 0,
 127                        (iommu_info.flags & AMD_IOMMU_DEVICE_FLAG_PASID_SUP) != 0);
 128                 return false;
 129         }
 130
 131         pasid_limit = min_t(unsigned int,
 132                         (unsigned int)1 << kfd->device_info->max_pasid_bits,
 133                         iommu_info.max_pasids);
 134         /*
 135          * last pasid is used for kernel queues doorbells
 136          * in the future the last pasid might be used for a kernel thread.
 137          */
 138         pasid_limit = min_t(unsigned int,
 139                                 pasid_limit,
 140                                 kfd->doorbell_process_limit - 1);
 141
 142         err = amd_iommu_init_device(kfd->pdev, pasid_limit);
 143         if (err < 0) {
 144                 dev_err(kfd_device, "error initializing iommu device\n");
 145                 return false;
 146         }
 147
 148         if (!kfd_set_pasid_limit(pasid_limit)) {
 149                 dev_err(kfd_device, "error setting pasid limit\n");
 150                 amd_iommu_free_device(kfd->pdev);
 151                 return false;
 152         }
 153
 154         return true;
 155 }
 156
 157 static void iommu_pasid_shutdown_callback(struct pci_dev *pdev, int pasid)
 158 {
 159         struct kfd_dev *dev = kfd_device_by_pci_dev(pdev);
 160
 161         if (dev)
 162                 kfd_unbind_process_from_device(dev, pasid);
 163 }
 164
 165 bool kgd2kfd_device_init(struct kfd_dev *kfd,
 166                          const struct kgd2kfd_shared_resources *gpu_resources)
 167 {
 168         unsigned int size;
 169
 170         kfd->shared_resources = *gpu_resources;
 171
 172         /* calculate max size of mqds needed for queues */
 173         size = max_num_of_queues_per_device *
 174                         kfd->device_info->mqd_size_aligned;
 175
 176         /* add another 512KB for all other allocations on gart */
 177         size += 512 * 1024;
 178
 179         if (kfd2kgd->init_sa_manager(kfd->kgd, size)) {
 180                 dev_err(kfd_device,
 181                         "Error initializing sa manager for device (%x:%x)\n",
 182                         kfd->pdev->vendor, kfd->pdev->device);
 183                 goto out;
 184         }
 185
 186         kfd_doorbell_init(kfd);
 187
 188         if (kfd_topology_add_device(kfd) != 0) {
 189                 dev_err(kfd_device,
 190                         "Error adding device (%x:%x) to topology\n",
 191                         kfd->pdev->vendor, kfd->pdev->device);
 192                 goto kfd_topology_add_device_error;
 193         }
 194
 195         if (!device_iommu_pasid_init(kfd)) {
 196                 dev_err(kfd_device,
 197                         "Error initializing iommuv2 for device (%x:%x)\n",
 198                         kfd->pdev->vendor, kfd->pdev->device);
 199                 goto device_iommu_pasid_error;
 200         }
 201         amd_iommu_set_invalidate_ctx_cb(kfd->pdev,
 202                                                 iommu_pasid_shutdown_callback);
 203
 204         kfd->dqm = device_queue_manager_init(kfd);
 205         if (!kfd->dqm) {
 206                 dev_err(kfd_device,
 207                         "Error initializing queue manager for device (%x:%x)\n",
 208                         kfd->pdev->vendor, kfd->pdev->device);
 209                 goto device_queue_manager_error;
 210         }
 211
 212         if (kfd->dqm->start(kfd->dqm) != 0) {
 213                 dev_err(kfd_device,
 214                         "Error starting queuen manager for device (%x:%x)\n",
 215                         kfd->pdev->vendor, kfd->pdev->device);
 216                 goto dqm_start_error;
 217         }
 218
 219         kfd->init_complete = true;
 220         dev_info(kfd_device, "added device (%x:%x)\n", kfd->pdev->vendor,
 221                  kfd->pdev->device);
 222
 223         pr_debug("kfd: Starting kfd with the following scheduling policy %d\n",
 224                 sched_policy);
 225
 226         goto out;
 227
 228 dqm_start_error:
 229         device_queue_manager_uninit(kfd->dqm);
 230 device_queue_manager_error:
 231         amd_iommu_free_device(kfd->pdev);
 232 device_iommu_pasid_error:
 233         kfd_topology_remove_device(kfd);
 234 kfd_topology_add_device_error:
 235         kfd2kgd->fini_sa_manager(kfd->kgd);
 236         dev_err(kfd_device,
 237                 "device (%x:%x) NOT added due to errors\n",
 238                 kfd->pdev->vendor, kfd->pdev->device);
 239 out:
 240         return kfd->init_complete;
 241 }
 242
 243 void kgd2kfd_device_exit(struct kfd_dev *kfd)
 244 {
 245         if (kfd->init_complete) {
 246                 device_queue_manager_uninit(kfd->dqm);
 247                 amd_iommu_free_device(kfd->pdev);
 248                 kfd_topology_remove_device(kfd);
 249         }
 250
 251         kfree(kfd);
 252 }
 253
 254 void kgd2kfd_suspend(struct kfd_dev *kfd)
 255 {
 256         BUG_ON(kfd == NULL);
 257
 258         if (kfd->init_complete) {
 259                 kfd->dqm->stop(kfd->dqm);
 260                 amd_iommu_set_invalidate_ctx_cb(kfd->pdev, NULL);
 261                 amd_iommu_free_device(kfd->pdev);
 262         }
 263 }
 264
 265 int kgd2kfd_resume(struct kfd_dev *kfd)
 266 {
 267         unsigned int pasid_limit;
 268         int err;
 269
 270         BUG_ON(kfd == NULL);
 271
 272         pasid_limit = kfd_get_pasid_limit();
 273
 274         if (kfd->init_complete) {
 275                 err = amd_iommu_init_device(kfd->pdev, pasid_limit);
 276                 if (err < 0)
 277                         return -ENXIO;
 278                 amd_iommu_set_invalidate_ctx_cb(kfd->pdev,
 279                                                 iommu_pasid_shutdown_callback);
 280                 kfd->dqm->start(kfd->dqm);
 281         }
 282
 283         return 0;
 284 }
 285
 286 /* This is called directly from KGD at ISR. */
 287 void kgd2kfd_interrupt(struct kfd_dev *kfd, const void *ih_ring_entry)
 288 {
 289         /* Process interrupts / schedule work as necessary */
 290 }