1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright (c) 2021 NVIDIA Corporation & Affiliates
7 #include <rte_malloc.h>
9 #include <rte_bus_pci.h>
10 #include <rte_byteorder.h>
13 #include <gpudev_driver.h>
16 #include <cudaTypedefs.h>
20 #define CUDA_DRIVER_MIN_VERSION 11040
21 #define CUDA_API_MIN_VERSION 3020
23 /* CUDA Driver functions loaded with dlsym() */
24 static CUresult CUDAAPI (*sym_cuInit)(unsigned int flags);
25 static CUresult CUDAAPI (*sym_cuDriverGetVersion)(int *driverVersion);
26 static CUresult CUDAAPI (*sym_cuGetProcAddress)(const char *symbol,
27 void **pfn, int cudaVersion, uint64_t flags);
29 /* CUDA Driver functions loaded with cuGetProcAddress for versioning */
30 static PFN_cuGetErrorString pfn_cuGetErrorString;
31 static PFN_cuGetErrorName pfn_cuGetErrorName;
32 static PFN_cuPointerSetAttribute pfn_cuPointerSetAttribute;
33 static PFN_cuDeviceGetAttribute pfn_cuDeviceGetAttribute;
34 static PFN_cuDeviceGetByPCIBusId pfn_cuDeviceGetByPCIBusId;
35 static PFN_cuDevicePrimaryCtxRetain pfn_cuDevicePrimaryCtxRetain;
36 static PFN_cuDevicePrimaryCtxRelease pfn_cuDevicePrimaryCtxRelease;
37 static PFN_cuDeviceTotalMem pfn_cuDeviceTotalMem;
38 static PFN_cuDeviceGetName pfn_cuDeviceGetName;
39 static PFN_cuCtxGetApiVersion pfn_cuCtxGetApiVersion;
40 static PFN_cuCtxSetCurrent pfn_cuCtxSetCurrent;
41 static PFN_cuCtxGetCurrent pfn_cuCtxGetCurrent;
42 static PFN_cuCtxGetDevice pfn_cuCtxGetDevice;
43 static PFN_cuCtxGetExecAffinity pfn_cuCtxGetExecAffinity;
44 static PFN_cuMemAlloc pfn_cuMemAlloc;
45 static PFN_cuMemFree pfn_cuMemFree;
46 static PFN_cuMemHostRegister pfn_cuMemHostRegister;
47 static PFN_cuMemHostUnregister pfn_cuMemHostUnregister;
48 static PFN_cuMemHostGetDevicePointer pfn_cuMemHostGetDevicePointer;
49 static PFN_cuFlushGPUDirectRDMAWrites pfn_cuFlushGPUDirectRDMAWrites;
52 static unsigned int cuda_api_version;
53 static int cuda_driver_version;
56 /* NVIDIA GPU vendor */
57 #define NVIDIA_GPU_VENDOR_ID (0x10de)
59 /* NVIDIA GPU device IDs */
60 #define NVIDIA_GPU_A100_40GB_DEVICE_ID (0x20f1)
61 #define NVIDIA_GPU_A100_80GB_DEVICE_ID (0x20b5)
62 #define NVIDIA_GPU_A100_80GB_DPU_DEVICE_ID (0x20b8)
64 #define NVIDIA_GPU_A30_24GB_DEVICE_ID (0x20b7)
65 #define NVIDIA_GPU_A10_24GB_DEVICE_ID (0x2236)
67 #define NVIDIA_GPU_V100_32GB_SXM_DEVICE_ID (0x1db5)
68 #define NVIDIA_GPU_V100_32GB_PCIE_DEVICE_ID (0x1db6)
69 #define NVIDIA_GPU_V100_16GB_DEVICE_ID (0x1db4)
71 #define NVIDIA_GPU_T4_16GB_DEVICE_ID (0x1eb8)
73 #define CUDA_MAX_ALLOCATION_NUM 512
75 #define GPU_PAGE_SHIFT 16
76 #define GPU_PAGE_SIZE (1UL << GPU_PAGE_SHIFT)
78 RTE_LOG_REGISTER_DEFAULT(cuda_logtype, NOTICE);
80 /* NVIDIA GPU address map */
81 static const struct rte_pci_id pci_id_cuda_map[] = {
83 RTE_PCI_DEVICE(NVIDIA_GPU_VENDOR_ID,
84 NVIDIA_GPU_A100_40GB_DEVICE_ID)
87 RTE_PCI_DEVICE(NVIDIA_GPU_VENDOR_ID,
88 NVIDIA_GPU_A100_80GB_DEVICE_ID)
91 RTE_PCI_DEVICE(NVIDIA_GPU_VENDOR_ID,
92 NVIDIA_GPU_A100_80GB_DPU_DEVICE_ID)
95 RTE_PCI_DEVICE(NVIDIA_GPU_VENDOR_ID,
96 NVIDIA_GPU_A30_24GB_DEVICE_ID)
99 RTE_PCI_DEVICE(NVIDIA_GPU_VENDOR_ID,
100 NVIDIA_GPU_A10_24GB_DEVICE_ID)
103 RTE_PCI_DEVICE(NVIDIA_GPU_VENDOR_ID,
104 NVIDIA_GPU_V100_32GB_SXM_DEVICE_ID)
107 RTE_PCI_DEVICE(NVIDIA_GPU_VENDOR_ID,
108 NVIDIA_GPU_V100_32GB_PCIE_DEVICE_ID)
111 RTE_PCI_DEVICE(NVIDIA_GPU_VENDOR_ID,
112 NVIDIA_GPU_V100_16GB_DEVICE_ID)
115 RTE_PCI_DEVICE(NVIDIA_GPU_VENDOR_ID,
116 NVIDIA_GPU_T4_16GB_DEVICE_ID)
123 /* Device private info */
125 char gpu_name[RTE_DEV_NAME_MAX_LEN];
128 int gdr_write_ordering;
132 /* Type of memory allocated by CUDA driver */
136 GPU_REGISTERED /* Not used yet */
139 /* key associated to a memory address */
140 typedef uintptr_t cuda_ptr_key;
142 /* Single entry of the memory list */
145 CUdeviceptr ptr_orig_d;
154 struct mem_entry *prev;
155 struct mem_entry *next;
158 static struct mem_entry *mem_alloc_list_head;
159 static struct mem_entry *mem_alloc_list_tail;
160 static uint32_t mem_alloc_list_last_elem;
162 /* Load the CUDA symbols */
167 char cuda_path[1024];
169 if (getenv("CUDA_PATH_L") == NULL)
170 snprintf(cuda_path, 1024, "%s", "libcuda.so");
172 snprintf(cuda_path, 1024, "%s/%s", getenv("CUDA_PATH_L"), "libcuda.so");
174 cudalib = dlopen(cuda_path, RTLD_LAZY);
175 if (cudalib == NULL) {
176 rte_cuda_log(ERR, "Failed to find CUDA library in %s (CUDA_PATH_L=%s)",
177 cuda_path, getenv("CUDA_PATH_L"));
185 cuda_sym_func_loader(void)
190 sym_cuInit = dlsym(cudalib, "cuInit");
191 if (sym_cuInit == NULL) {
192 rte_cuda_log(ERR, "Failed to load CUDA missing symbol cuInit");
196 sym_cuDriverGetVersion = dlsym(cudalib, "cuDriverGetVersion");
197 if (sym_cuDriverGetVersion == NULL) {
198 rte_cuda_log(ERR, "Failed to load CUDA missing symbol cuDriverGetVersion");
202 sym_cuGetProcAddress = dlsym(cudalib, "cuGetProcAddress");
203 if (sym_cuGetProcAddress == NULL) {
204 rte_cuda_log(ERR, "Failed to load CUDA missing symbol cuGetProcAddress");
212 cuda_pfn_func_loader(void)
216 res = sym_cuGetProcAddress("cuGetErrorString",
217 (void **) (&pfn_cuGetErrorString), cuda_driver_version, 0);
219 rte_cuda_log(ERR, "Retrieve pfn_cuGetErrorString failed with %d", res);
223 res = sym_cuGetProcAddress("cuGetErrorName",
224 (void **)(&pfn_cuGetErrorName), cuda_driver_version, 0);
226 rte_cuda_log(ERR, "Retrieve pfn_cuGetErrorName failed with %d", res);
230 res = sym_cuGetProcAddress("cuPointerSetAttribute",
231 (void **)(&pfn_cuPointerSetAttribute), cuda_driver_version, 0);
233 rte_cuda_log(ERR, "Retrieve pfn_cuPointerSetAttribute failed with %d", res);
237 res = sym_cuGetProcAddress("cuDeviceGetAttribute",
238 (void **)(&pfn_cuDeviceGetAttribute), cuda_driver_version, 0);
240 rte_cuda_log(ERR, "Retrieve pfn_cuDeviceGetAttribute failed with %d", res);
244 res = sym_cuGetProcAddress("cuDeviceGetByPCIBusId",
245 (void **)(&pfn_cuDeviceGetByPCIBusId), cuda_driver_version, 0);
247 rte_cuda_log(ERR, "Retrieve pfn_cuDeviceGetByPCIBusId failed with %d", res);
251 res = sym_cuGetProcAddress("cuDeviceGetName",
252 (void **)(&pfn_cuDeviceGetName), cuda_driver_version, 0);
254 rte_cuda_log(ERR, "Retrieve pfn_cuDeviceGetName failed with %d", res);
258 res = sym_cuGetProcAddress("cuDevicePrimaryCtxRetain",
259 (void **)(&pfn_cuDevicePrimaryCtxRetain), cuda_driver_version, 0);
261 rte_cuda_log(ERR, "Retrieve pfn_cuDevicePrimaryCtxRetain failed with %d", res);
265 res = sym_cuGetProcAddress("cuDevicePrimaryCtxRelease",
266 (void **)(&pfn_cuDevicePrimaryCtxRelease), cuda_driver_version, 0);
268 rte_cuda_log(ERR, "Retrieve pfn_cuDevicePrimaryCtxRelease failed with %d", res);
272 res = sym_cuGetProcAddress("cuDeviceTotalMem",
273 (void **)(&pfn_cuDeviceTotalMem), cuda_driver_version, 0);
275 rte_cuda_log(ERR, "Retrieve pfn_cuDeviceTotalMem failed with %d", res);
279 res = sym_cuGetProcAddress("cuCtxGetApiVersion",
280 (void **)(&pfn_cuCtxGetApiVersion), cuda_driver_version, 0);
282 rte_cuda_log(ERR, "Retrieve pfn_cuCtxGetApiVersion failed with %d", res);
286 res = sym_cuGetProcAddress("cuCtxGetDevice",
287 (void **)(&pfn_cuCtxGetDevice), cuda_driver_version, 0);
289 rte_cuda_log(ERR, "Retrieve pfn_cuCtxGetDevice failed with %d", res);
293 res = sym_cuGetProcAddress("cuCtxSetCurrent",
294 (void **)(&pfn_cuCtxSetCurrent), cuda_driver_version, 0);
296 rte_cuda_log(ERR, "Retrieve pfn_cuCtxSetCurrent failed with %d", res);
300 res = sym_cuGetProcAddress("cuCtxGetCurrent",
301 (void **)(&pfn_cuCtxGetCurrent), cuda_driver_version, 0);
303 rte_cuda_log(ERR, "Retrieve pfn_cuCtxGetCurrent failed with %d", res);
307 res = sym_cuGetProcAddress("cuCtxGetExecAffinity",
308 (void **)(&pfn_cuCtxGetExecAffinity), cuda_driver_version, 0);
310 rte_cuda_log(ERR, "Retrieve pfn_cuCtxGetExecAffinity failed with %d", res);
314 res = sym_cuGetProcAddress("cuMemAlloc",
315 (void **)(&pfn_cuMemAlloc), cuda_driver_version, 0);
317 rte_cuda_log(ERR, "Retrieve pfn_cuMemAlloc failed with %d", res);
321 res = sym_cuGetProcAddress("cuMemFree",
322 (void **)(&pfn_cuMemFree), cuda_driver_version, 0);
324 rte_cuda_log(ERR, "Retrieve pfn_cuMemFree failed with %d", res);
328 res = sym_cuGetProcAddress("cuMemHostRegister",
329 (void **)(&pfn_cuMemHostRegister), cuda_driver_version, 0);
331 rte_cuda_log(ERR, "Retrieve pfn_cuMemHostRegister failed with %d", res);
335 res = sym_cuGetProcAddress("cuMemHostUnregister",
336 (void **)(&pfn_cuMemHostUnregister), cuda_driver_version, 0);
338 rte_cuda_log(ERR, "Retrieve pfn_cuMemHostUnregister failed with %d", res);
342 res = sym_cuGetProcAddress("cuMemHostGetDevicePointer",
343 (void **)(&pfn_cuMemHostGetDevicePointer), cuda_driver_version, 0);
345 rte_cuda_log(ERR, "Retrieve pfn_cuMemHostGetDevicePointer failed with %d", res);
349 res = sym_cuGetProcAddress("cuFlushGPUDirectRDMAWrites",
350 (void **)(&pfn_cuFlushGPUDirectRDMAWrites), cuda_driver_version, 0);
352 rte_cuda_log(ERR, "Retrieve cuFlushGPUDirectRDMAWrites failed with %d", res);
359 /* Generate a key from a memory pointer */
361 get_hash_from_ptr(void *ptr)
363 return (uintptr_t)ptr;
367 mem_list_count_item(void)
369 return mem_alloc_list_last_elem;
372 /* Initiate list of memory allocations if not done yet */
373 static struct mem_entry *
374 mem_list_add_item(void)
376 /* Initiate list of memory allocations if not done yet */
377 if (mem_alloc_list_head == NULL) {
378 mem_alloc_list_head = rte_zmalloc(NULL,
379 sizeof(struct mem_entry),
380 RTE_CACHE_LINE_SIZE);
381 if (mem_alloc_list_head == NULL) {
382 rte_cuda_log(ERR, "Failed to allocate memory for memory list");
386 mem_alloc_list_head->next = NULL;
387 mem_alloc_list_head->prev = NULL;
388 mem_alloc_list_tail = mem_alloc_list_head;
390 struct mem_entry *mem_alloc_list_cur = rte_zmalloc(NULL,
391 sizeof(struct mem_entry),
392 RTE_CACHE_LINE_SIZE);
394 if (mem_alloc_list_cur == NULL) {
395 rte_cuda_log(ERR, "Failed to allocate memory for memory list");
399 mem_alloc_list_tail->next = mem_alloc_list_cur;
400 mem_alloc_list_cur->prev = mem_alloc_list_tail;
401 mem_alloc_list_tail = mem_alloc_list_tail->next;
402 mem_alloc_list_tail->next = NULL;
405 mem_alloc_list_last_elem++;
407 return mem_alloc_list_tail;
410 static struct mem_entry *
411 mem_list_find_item(cuda_ptr_key pk)
413 struct mem_entry *mem_alloc_list_cur = NULL;
415 if (mem_alloc_list_head == NULL) {
416 rte_cuda_log(ERR, "Memory list doesn't exist");
420 if (mem_list_count_item() == 0) {
421 rte_cuda_log(ERR, "No items in memory list");
425 mem_alloc_list_cur = mem_alloc_list_head;
427 while (mem_alloc_list_cur != NULL) {
428 if (mem_alloc_list_cur->pkey == pk)
429 return mem_alloc_list_cur;
430 mem_alloc_list_cur = mem_alloc_list_cur->next;
433 return mem_alloc_list_cur;
437 mem_list_del_item(cuda_ptr_key pk)
439 struct mem_entry *mem_alloc_list_cur = NULL;
441 mem_alloc_list_cur = mem_list_find_item(pk);
442 if (mem_alloc_list_cur == NULL)
445 /* if key is in head */
446 if (mem_alloc_list_cur->prev == NULL) {
447 mem_alloc_list_head = mem_alloc_list_cur->next;
448 if (mem_alloc_list_head != NULL)
449 mem_alloc_list_head->prev = NULL;
451 mem_alloc_list_cur->prev->next = mem_alloc_list_cur->next;
452 if (mem_alloc_list_cur->next != NULL)
453 mem_alloc_list_cur->next->prev = mem_alloc_list_cur->prev;
456 rte_free(mem_alloc_list_cur);
458 mem_alloc_list_last_elem--;
464 cuda_dev_info_get(struct rte_gpu *dev, struct rte_gpu_info *info)
468 struct rte_gpu_info parent_info;
469 CUexecAffinityParam affinityPrm;
470 const char *err_string;
471 struct cuda_info *private;
472 CUcontext current_ctx;
480 /* Child initialization time probably called by rte_gpu_add_child() */
481 if (dev->mpshared->info.parent != RTE_GPU_ID_NONE &&
482 dev->mpshared->dev_private == NULL) {
483 /* Store current ctx */
484 res = pfn_cuCtxGetCurrent(¤t_ctx);
486 pfn_cuGetErrorString(res, &(err_string));
487 rte_cuda_log(ERR, "cuCtxGetCurrent failed with %s",
493 /* Set child ctx as current ctx */
494 input_ctx = (CUcontext)((uintptr_t)dev->mpshared->info.context);
495 res = pfn_cuCtxSetCurrent(input_ctx);
497 pfn_cuGetErrorString(res, &(err_string));
498 rte_cuda_log(ERR, "cuCtxSetCurrent input failed with %s",
509 res = pfn_cuCtxGetExecAffinity(&affinityPrm,
510 CU_EXEC_AFFINITY_TYPE_SM_COUNT);
512 pfn_cuGetErrorString(res, &(err_string));
513 rte_cuda_log(ERR, "cuCtxGetExecAffinity failed with %s",
516 dev->mpshared->info.processor_count =
517 (uint32_t)affinityPrm.param.smCount.val;
519 ret = rte_gpu_info_get(dev->mpshared->info.parent, &parent_info);
524 dev->mpshared->info.total_memory = parent_info.total_memory;
527 * GPU Device private info
529 dev->mpshared->dev_private = rte_zmalloc(NULL,
530 sizeof(struct cuda_info),
531 RTE_CACHE_LINE_SIZE);
532 if (dev->mpshared->dev_private == NULL) {
533 rte_cuda_log(ERR, "Failed to allocate memory for GPU process private");
538 private = (struct cuda_info *)dev->mpshared->dev_private;
540 res = pfn_cuCtxGetDevice(&(private->cu_dev));
542 pfn_cuGetErrorString(res, &(err_string));
543 rte_cuda_log(ERR, "cuCtxGetDevice failed with %s",
549 res = pfn_cuDeviceGetName(private->gpu_name,
550 RTE_DEV_NAME_MAX_LEN, private->cu_dev);
552 pfn_cuGetErrorString(res, &(err_string));
553 rte_cuda_log(ERR, "cuDeviceGetName failed with %s",
559 /* Restore original ctx as current ctx */
560 res = pfn_cuCtxSetCurrent(current_ctx);
562 pfn_cuGetErrorString(res, &(err_string));
563 rte_cuda_log(ERR, "cuCtxSetCurrent current failed with %s",
570 *info = dev->mpshared->info;
580 cuda_mem_alloc(struct rte_gpu *dev, size_t size, unsigned int align, void **ptr)
583 const char *err_string;
584 CUcontext current_ctx;
586 unsigned int flag = 1;
591 /* Store current ctx */
592 res = pfn_cuCtxGetCurrent(¤t_ctx);
594 pfn_cuGetErrorString(res, &(err_string));
595 rte_cuda_log(ERR, "cuCtxGetCurrent failed with %s",
601 /* Set child ctx as current ctx */
602 input_ctx = (CUcontext)((uintptr_t)dev->mpshared->info.context);
603 res = pfn_cuCtxSetCurrent(input_ctx);
605 pfn_cuGetErrorString(res, &(err_string));
606 rte_cuda_log(ERR, "cuCtxSetCurrent input failed with %s",
612 /* Get next memory list item */
613 mem_alloc_list_tail = mem_list_add_item();
614 if (mem_alloc_list_tail == NULL) {
619 /* Allocate memory */
620 mem_alloc_list_tail->size = size;
621 mem_alloc_list_tail->size_orig = size + align;
623 res = pfn_cuMemAlloc(&(mem_alloc_list_tail->ptr_orig_d),
624 mem_alloc_list_tail->size_orig);
626 pfn_cuGetErrorString(res, &(err_string));
627 rte_cuda_log(ERR, "cuCtxSetCurrent current failed with %s",
633 /* Align memory address */
634 mem_alloc_list_tail->ptr_d = mem_alloc_list_tail->ptr_orig_d;
635 if (align && ((uintptr_t)mem_alloc_list_tail->ptr_d) % align)
636 mem_alloc_list_tail->ptr_d += (align -
637 (((uintptr_t)mem_alloc_list_tail->ptr_d) % align));
639 /* GPUDirect RDMA attribute required */
640 res = pfn_cuPointerSetAttribute(&flag,
641 CU_POINTER_ATTRIBUTE_SYNC_MEMOPS,
642 mem_alloc_list_tail->ptr_d);
644 rte_cuda_log(ERR, "Could not set SYNC MEMOP attribute for "
645 "GPU memory at %"PRIu32", err %d",
646 (uint32_t)mem_alloc_list_tail->ptr_d, res);
651 mem_alloc_list_tail->pkey = get_hash_from_ptr((void *)mem_alloc_list_tail->ptr_d);
652 mem_alloc_list_tail->ptr_h = NULL;
653 mem_alloc_list_tail->dev = dev;
654 mem_alloc_list_tail->ctx = (CUcontext)((uintptr_t)dev->mpshared->info.context);
655 mem_alloc_list_tail->mtype = GPU_MEM;
657 /* Restore original ctx as current ctx */
658 res = pfn_cuCtxSetCurrent(current_ctx);
660 pfn_cuGetErrorString(res, &(err_string));
661 rte_cuda_log(ERR, "cuCtxSetCurrent current failed with %s",
667 *ptr = (void *)mem_alloc_list_tail->ptr_d;
673 cuda_mem_register(struct rte_gpu *dev, size_t size, void *ptr)
676 const char *err_string;
677 CUcontext current_ctx;
679 unsigned int flag = 1;
685 /* Store current ctx */
686 res = pfn_cuCtxGetCurrent(¤t_ctx);
688 pfn_cuGetErrorString(res, &(err_string));
689 rte_cuda_log(ERR, "cuCtxGetCurrent failed with %s",
695 /* Set child ctx as current ctx */
696 input_ctx = (CUcontext)((uintptr_t)dev->mpshared->info.context);
697 res = pfn_cuCtxSetCurrent(input_ctx);
699 pfn_cuGetErrorString(res, &(err_string));
700 rte_cuda_log(ERR, "cuCtxSetCurrent input failed with %s",
706 /* Get next memory list item */
707 mem_alloc_list_tail = mem_list_add_item();
708 if (mem_alloc_list_tail == NULL) {
713 /* Allocate memory */
714 mem_alloc_list_tail->size = size;
715 mem_alloc_list_tail->ptr_h = ptr;
717 res = pfn_cuMemHostRegister(mem_alloc_list_tail->ptr_h,
718 mem_alloc_list_tail->size,
719 CU_MEMHOSTREGISTER_PORTABLE |
720 CU_MEMHOSTREGISTER_DEVICEMAP);
722 pfn_cuGetErrorString(res, &(err_string));
723 rte_cuda_log(ERR, "cuMemHostRegister failed with %s ptr %p size %zd",
725 mem_alloc_list_tail->ptr_h,
726 mem_alloc_list_tail->size);
731 res = pfn_cuDeviceGetAttribute(&(use_ptr_h),
732 CU_DEVICE_ATTRIBUTE_CAN_USE_HOST_POINTER_FOR_REGISTERED_MEM,
733 ((struct cuda_info *)(dev->mpshared->dev_private))->cu_dev);
735 pfn_cuGetErrorString(res, &(err_string));
736 rte_cuda_log(ERR, "cuDeviceGetAttribute failed with %s",
742 if (use_ptr_h == 0) {
743 res = pfn_cuMemHostGetDevicePointer(&(mem_alloc_list_tail->ptr_d),
744 mem_alloc_list_tail->ptr_h, 0);
746 pfn_cuGetErrorString(res, &(err_string));
747 rte_cuda_log(ERR, "cuMemHostGetDevicePointer failed with %s",
753 if ((uintptr_t)mem_alloc_list_tail->ptr_d !=
754 (uintptr_t)mem_alloc_list_tail->ptr_h) {
755 rte_cuda_log(ERR, "Host input pointer is different wrt GPU registered pointer");
760 mem_alloc_list_tail->ptr_d = (CUdeviceptr)mem_alloc_list_tail->ptr_h;
763 /* GPUDirect RDMA attribute required */
764 res = pfn_cuPointerSetAttribute(&flag,
765 CU_POINTER_ATTRIBUTE_SYNC_MEMOPS,
766 mem_alloc_list_tail->ptr_d);
768 rte_cuda_log(ERR, "Could not set SYNC MEMOP attribute for GPU memory at %"PRIu32
769 ", err %d", (uint32_t)mem_alloc_list_tail->ptr_d, res);
774 mem_alloc_list_tail->pkey = get_hash_from_ptr((void *)mem_alloc_list_tail->ptr_h);
775 mem_alloc_list_tail->size = size;
776 mem_alloc_list_tail->dev = dev;
777 mem_alloc_list_tail->ctx = (CUcontext)((uintptr_t)dev->mpshared->info.context);
778 mem_alloc_list_tail->mtype = CPU_REGISTERED;
779 mem_alloc_list_tail->ptr_orig_d = mem_alloc_list_tail->ptr_d;
781 /* Restore original ctx as current ctx */
782 res = pfn_cuCtxSetCurrent(current_ctx);
784 pfn_cuGetErrorString(res, &(err_string));
785 rte_cuda_log(ERR, "cuCtxSetCurrent current failed with %s",
795 cuda_mem_cpu_map(struct rte_gpu *dev, __rte_unused size_t size, void *ptr_in, void **ptr_out)
797 struct mem_entry *mem_item;
803 hk = get_hash_from_ptr((void *)ptr_in);
805 mem_item = mem_list_find_item(hk);
806 if (mem_item == NULL) {
807 rte_cuda_log(ERR, "Memory address 0x%p not found in driver memory.", ptr_in);
812 if (mem_item->mtype != GPU_MEM) {
813 rte_cuda_log(ERR, "Memory address 0x%p is not GPU memory type.", ptr_in);
818 if (mem_item->size != size)
819 rte_cuda_log(WARNING,
820 "Can't expose memory area with size (%zd) different from original size (%zd).",
821 size, mem_item->size);
823 if (gdrcopy_pin(&gdrc_h, &(mem_item->mh), (uint64_t)mem_item->ptr_d,
824 mem_item->size, &(mem_item->ptr_h))) {
825 rte_cuda_log(ERR, "Error exposing GPU memory address 0x%p.", ptr_in);
830 *ptr_out = mem_item->ptr_h;
836 cuda_mem_free(struct rte_gpu *dev, void *ptr)
839 struct mem_entry *mem_item;
840 const char *err_string;
846 hk = get_hash_from_ptr((void *)ptr);
848 mem_item = mem_list_find_item(hk);
849 if (mem_item == NULL) {
850 rte_cuda_log(ERR, "Memory address 0x%p not found in driver memory", ptr);
855 if (mem_item->mtype == GPU_MEM) {
856 res = pfn_cuMemFree(mem_item->ptr_orig_d);
858 pfn_cuGetErrorString(res, &(err_string));
859 rte_cuda_log(ERR, "cuMemFree current failed with %s",
865 return mem_list_del_item(hk);
868 rte_cuda_log(ERR, "Memory type %d not supported", mem_item->mtype);
874 cuda_mem_unregister(struct rte_gpu *dev, void *ptr)
877 struct mem_entry *mem_item;
878 const char *err_string;
884 hk = get_hash_from_ptr((void *)ptr);
886 mem_item = mem_list_find_item(hk);
887 if (mem_item == NULL) {
888 rte_cuda_log(ERR, "Memory address 0x%p not found in driver memory", ptr);
893 if (mem_item->mtype == CPU_REGISTERED) {
894 res = pfn_cuMemHostUnregister(ptr);
896 pfn_cuGetErrorString(res, &(err_string));
897 rte_cuda_log(ERR, "cuMemHostUnregister current failed with %s",
903 return mem_list_del_item(hk);
906 rte_cuda_log(ERR, "Memory type %d not supported", mem_item->mtype);
913 cuda_mem_cpu_unmap(struct rte_gpu *dev, void *ptr_in)
915 struct mem_entry *mem_item;
921 hk = get_hash_from_ptr((void *)ptr_in);
923 mem_item = mem_list_find_item(hk);
924 if (mem_item == NULL) {
925 rte_cuda_log(ERR, "Memory address 0x%p not found in driver memory.", ptr_in);
930 if (gdrcopy_unpin(gdrc_h, mem_item->mh, (void *)mem_item->ptr_d,
932 rte_cuda_log(ERR, "Error unexposing GPU memory address 0x%p.", ptr_in);
941 cuda_dev_close(struct rte_gpu *dev)
946 rte_free(dev->mpshared->dev_private);
952 cuda_wmb(struct rte_gpu *dev)
955 const char *err_string;
956 CUcontext current_ctx;
958 struct cuda_info *private;
965 private = (struct cuda_info *)dev->mpshared->dev_private;
967 if (private->gdr_write_ordering != CU_GPU_DIRECT_RDMA_WRITES_ORDERING_NONE) {
969 * No need to explicitly force the write ordering because
970 * the device natively supports it
975 if (private->gdr_flush_type != CU_FLUSH_GPU_DIRECT_RDMA_WRITES_OPTION_HOST) {
977 * Can't flush GDR writes with cuFlushGPUDirectRDMAWrites CUDA function.
978 * Application needs to use alternative methods.
980 rte_cuda_log(WARNING, "Can't flush GDR writes with cuFlushGPUDirectRDMAWrites CUDA function."
981 "Application needs to use alternative methods.");
987 /* Store current ctx */
988 res = pfn_cuCtxGetCurrent(¤t_ctx);
990 pfn_cuGetErrorString(res, &(err_string));
991 rte_cuda_log(ERR, "cuCtxGetCurrent failed with %s",
997 /* Set child ctx as current ctx */
998 input_ctx = (CUcontext)((uintptr_t)dev->mpshared->info.context);
999 res = pfn_cuCtxSetCurrent(input_ctx);
1001 pfn_cuGetErrorString(res, &(err_string));
1002 rte_cuda_log(ERR, "cuCtxSetCurrent input failed with %s",
1008 res = pfn_cuFlushGPUDirectRDMAWrites(CU_FLUSH_GPU_DIRECT_RDMA_WRITES_TARGET_CURRENT_CTX,
1009 CU_FLUSH_GPU_DIRECT_RDMA_WRITES_TO_ALL_DEVICES);
1011 pfn_cuGetErrorString(res, &(err_string));
1012 rte_cuda_log(ERR, "cuFlushGPUDirectRDMAWrites current failed with %s",
1018 /* Restore original ctx as current ctx */
1019 res = pfn_cuCtxSetCurrent(current_ctx);
1021 pfn_cuGetErrorString(res, &(err_string));
1022 rte_cuda_log(ERR, "cuCtxSetCurrent current failed with %s",
1032 cuda_gpu_probe(__rte_unused struct rte_pci_driver *pci_drv, struct rte_pci_device *pci_dev)
1034 struct rte_gpu *dev = NULL;
1038 char dev_name[RTE_DEV_NAME_MAX_LEN];
1039 const char *err_string;
1040 int processor_count = 0;
1041 struct cuda_info *private;
1043 if (pci_dev == NULL) {
1044 rte_cuda_log(ERR, "NULL PCI device");
1049 rte_pci_device_name(&pci_dev->addr, dev_name, sizeof(dev_name));
1051 /* Allocate memory to be used privately by drivers */
1052 dev = rte_gpu_allocate(pci_dev->device.name);
1058 /* Initialize values only for the first CUDA driver call */
1059 if (dev->mpshared->info.dev_id == 0) {
1060 mem_alloc_list_head = NULL;
1061 mem_alloc_list_tail = NULL;
1062 mem_alloc_list_last_elem = 0;
1064 /* Load libcuda.so library */
1065 if (cuda_loader()) {
1066 rte_cuda_log(ERR, "CUDA Driver library not found");
1067 rte_errno = ENOTSUP;
1071 /* Load initial CUDA functions */
1072 if (cuda_sym_func_loader()) {
1073 rte_cuda_log(ERR, "CUDA functions not found in library");
1074 rte_errno = ENOTSUP;
1079 * Required to initialize the CUDA Driver.
1080 * Multiple calls of cuInit() will return immediately
1081 * without making any relevant change
1085 res = sym_cuDriverGetVersion(&cuda_driver_version);
1087 rte_cuda_log(ERR, "cuDriverGetVersion failed with %d", res);
1088 rte_errno = ENOTSUP;
1092 if (cuda_driver_version < CUDA_DRIVER_MIN_VERSION) {
1093 rte_cuda_log(ERR, "CUDA Driver version found is %d. "
1094 "Minimum requirement is %d",
1095 cuda_driver_version,
1096 CUDA_DRIVER_MIN_VERSION);
1097 rte_errno = ENOTSUP;
1101 if (cuda_pfn_func_loader()) {
1102 rte_cuda_log(ERR, "CUDA PFN functions not found in library");
1103 rte_errno = ENOTSUP;
1110 /* Fill HW specific part of device structure */
1111 dev->device = &pci_dev->device;
1112 dev->mpshared->info.numa_node = pci_dev->device.numa_node;
1114 /* Get NVIDIA GPU Device descriptor */
1115 res = pfn_cuDeviceGetByPCIBusId(&cu_dev_id, dev->device->name);
1117 pfn_cuGetErrorString(res, &(err_string));
1118 rte_cuda_log(ERR, "cuDeviceGetByPCIBusId name %s failed with %d: %s",
1119 dev->device->name, res, err_string);
1124 res = pfn_cuDevicePrimaryCtxRetain(&pctx, cu_dev_id);
1126 pfn_cuGetErrorString(res, &(err_string));
1127 rte_cuda_log(ERR, "cuDevicePrimaryCtxRetain name %s failed with %d: %s",
1128 dev->device->name, res, err_string);
1133 res = pfn_cuCtxGetApiVersion(pctx, &cuda_api_version);
1135 rte_cuda_log(ERR, "cuCtxGetApiVersion failed with %d", res);
1136 rte_errno = ENOTSUP;
1140 if (cuda_api_version < CUDA_API_MIN_VERSION) {
1141 rte_cuda_log(ERR, "CUDA API version found is %d Minimum requirement is %d",
1142 cuda_api_version, CUDA_API_MIN_VERSION);
1143 rte_errno = ENOTSUP;
1147 dev->mpshared->info.context = (uint64_t)pctx;
1150 * GPU Device generic info
1153 /* Processor count */
1154 res = pfn_cuDeviceGetAttribute(&(processor_count),
1155 CU_DEVICE_ATTRIBUTE_MULTIPROCESSOR_COUNT,
1158 pfn_cuGetErrorString(res, &(err_string));
1159 rte_cuda_log(ERR, "cuDeviceGetAttribute failed with %s",
1164 dev->mpshared->info.processor_count = (uint32_t)processor_count;
1167 res = pfn_cuDeviceTotalMem(&dev->mpshared->info.total_memory, cu_dev_id);
1169 pfn_cuGetErrorString(res, &(err_string));
1170 rte_cuda_log(ERR, "cuDeviceTotalMem failed with %s",
1177 * GPU Device private info
1179 dev->mpshared->dev_private = rte_zmalloc(NULL,
1180 sizeof(struct cuda_info),
1181 RTE_CACHE_LINE_SIZE);
1182 if (dev->mpshared->dev_private == NULL) {
1183 rte_cuda_log(ERR, "Failed to allocate memory for GPU process private");
1188 private = (struct cuda_info *)dev->mpshared->dev_private;
1189 private->cu_dev = cu_dev_id;
1190 res = pfn_cuDeviceGetName(private->gpu_name,
1191 RTE_DEV_NAME_MAX_LEN,
1194 pfn_cuGetErrorString(res, &(err_string));
1195 rte_cuda_log(ERR, "cuDeviceGetName failed with %s",
1201 res = pfn_cuDeviceGetAttribute(&(private->gdr_supported),
1202 CU_DEVICE_ATTRIBUTE_GPU_DIRECT_RDMA_SUPPORTED,
1205 pfn_cuGetErrorString(res, &(err_string));
1206 rte_cuda_log(ERR, "cuDeviceGetAttribute failed with %s",
1212 if (private->gdr_supported == 0)
1213 rte_cuda_log(WARNING, "GPU %s doesn't support GPUDirect RDMA",
1214 pci_dev->device.name);
1216 res = pfn_cuDeviceGetAttribute(&(private->gdr_write_ordering),
1217 CU_DEVICE_ATTRIBUTE_GPU_DIRECT_RDMA_WRITES_ORDERING,
1220 pfn_cuGetErrorString(res, &(err_string));
1222 "cuDeviceGetAttribute failed with %s",
1228 if (private->gdr_write_ordering == CU_GPU_DIRECT_RDMA_WRITES_ORDERING_NONE) {
1229 res = pfn_cuDeviceGetAttribute(&(private->gdr_flush_type),
1230 CU_DEVICE_ATTRIBUTE_GPU_DIRECT_RDMA_FLUSH_WRITES_OPTIONS,
1233 pfn_cuGetErrorString(res, &(err_string));
1234 rte_cuda_log(ERR, "cuDeviceGetAttribute failed with %s",
1240 if (private->gdr_flush_type != CU_FLUSH_GPU_DIRECT_RDMA_WRITES_OPTION_HOST)
1241 rte_cuda_log(ERR, "GPUDirect RDMA flush writes API is not supported");
1244 dev->ops.dev_info_get = cuda_dev_info_get;
1245 dev->ops.dev_close = cuda_dev_close;
1246 dev->ops.mem_alloc = cuda_mem_alloc;
1247 dev->ops.mem_free = cuda_mem_free;
1248 dev->ops.mem_register = cuda_mem_register;
1249 dev->ops.mem_unregister = cuda_mem_unregister;
1250 dev->ops.mem_cpu_map = cuda_mem_cpu_map;
1251 dev->ops.mem_cpu_unmap = cuda_mem_cpu_unmap;
1252 dev->ops.wmb = cuda_wmb;
1254 rte_gpu_complete_new(dev);
1256 rte_cuda_debug("dev id = %u name = %s",
1257 dev->mpshared->info.dev_id, private->gpu_name);
1263 cuda_gpu_remove(struct rte_pci_device *pci_dev)
1265 struct rte_gpu *dev;
1269 if (pci_dev == NULL) {
1274 dev = rte_gpu_get_by_name(pci_dev->device.name);
1276 rte_cuda_log(ERR, "Couldn't find HW dev \"%s\" to uninitialise it",
1277 pci_dev->device.name);
1281 gpu_id = dev->mpshared->info.dev_id;
1283 /* release dev from library */
1284 ret = rte_gpu_release(dev);
1286 rte_cuda_log(ERR, "Device %i failed to uninit: %i", gpu_id, ret);
1288 rte_cuda_debug("Destroyed dev = %u", gpu_id);
1293 static struct rte_pci_driver rte_cuda_driver = {
1294 .id_table = pci_id_cuda_map,
1295 .drv_flags = RTE_PCI_DRV_WC_ACTIVATE,
1296 .probe = cuda_gpu_probe,
1297 .remove = cuda_gpu_remove,
1300 RTE_PMD_REGISTER_PCI(gpu_cuda, rte_cuda_driver);
1301 RTE_PMD_REGISTER_PCI_TABLE(gpu_cuda, pci_id_cuda_map);
1302 RTE_PMD_REGISTER_KMOD_DEP(gpu_cuda, "* nvidia & (nv_peer_mem | nvpeer_mem)");