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 } 291