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open-gpu-kernel-modules/kernel-open/nvidia/nv_uvm_interface.c

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2022-05-09 22:18:59 +02:00
/*
* SPDX-FileCopyrightText: Copyright (c) 2013-2021 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
* SPDX-License-Identifier: MIT
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
/*
* This file sets up the communication between the UVM driver and RM. RM will
* call the UVM driver providing to it the set of OPS it supports. UVM will
* then return by filling out the structure with the callbacks it supports.
*/
#define __NO_VERSION__
#include "os-interface.h"
#include "nv-linux.h"
#if defined(NV_UVM_ENABLE)
#include "nv_uvm_interface.h"
#include "nv_gpu_ops.h"
#include "rm-gpu-ops.h"
// This is really a struct UvmOpsUvmEvents *. It needs to be an atomic because
// it can be read outside of the g_pNvUvmEventsLock. Use getUvmEvents and
// setUvmEvents to access it.
static atomic_long_t g_pNvUvmEvents;
static struct semaphore g_pNvUvmEventsLock;
static struct UvmOpsUvmEvents *getUvmEvents(void)
{
return (struct UvmOpsUvmEvents *)atomic_long_read(&g_pNvUvmEvents);
}
static void setUvmEvents(struct UvmOpsUvmEvents *newEvents)
{
atomic_long_set(&g_pNvUvmEvents, (long)newEvents);
}
static nvidia_stack_t *g_sp;
static struct semaphore g_spLock;
// Use these to test g_sp usage. When DEBUG_GLOBAL_STACK, one out of every
// DEBUG_GLOBAL_STACK_THRESHOLD calls to nvUvmGetSafeStack will use g_sp.
#define DEBUG_GLOBAL_STACK 0
#define DEBUG_GLOBAL_STACK_THRESHOLD 2
static atomic_t g_debugGlobalStackCount = ATOMIC_INIT(0);
// Called at module load, not by an external client
int nv_uvm_init(void)
{
int rc = nv_kmem_cache_alloc_stack(&g_sp);
if (rc != 0)
return rc;
NV_INIT_MUTEX(&g_spLock);
NV_INIT_MUTEX(&g_pNvUvmEventsLock);
return 0;
}
void nv_uvm_exit(void)
{
// If this fires, the dependent driver never unregistered its callbacks with
// us before going away, leaving us potentially making callbacks to garbage
// memory.
WARN_ON(getUvmEvents() != NULL);
nv_kmem_cache_free_stack(g_sp);
}
// Testing code to force use of the global stack every now and then
static NvBool forceGlobalStack(void)
{
// Make sure that we do not try to allocate memory in interrupt or atomic
// context
if (DEBUG_GLOBAL_STACK || !NV_MAY_SLEEP())
{
if ((atomic_inc_return(&g_debugGlobalStackCount) %
DEBUG_GLOBAL_STACK_THRESHOLD) == 0)
return NV_TRUE;
}
return NV_FALSE;
}
// Guaranteed to always return a valid stack. It first attempts to allocate one
// from the pool. If that fails, it falls back to the global pre-allocated
// stack. This fallback will serialize.
//
// This is required so paths that free resources do not themselves require
// allocation of resources.
static nvidia_stack_t *nvUvmGetSafeStack(void)
{
nvidia_stack_t *sp;
if (forceGlobalStack() || nv_kmem_cache_alloc_stack(&sp) != 0)
{
sp = g_sp;
down(&g_spLock);
}
return sp;
}
static void nvUvmFreeSafeStack(nvidia_stack_t *sp)
{
if (sp == g_sp)
up(&g_spLock);
else
nv_kmem_cache_free_stack(sp);
}
NV_STATUS nvUvmInterfaceRegisterGpu(const NvProcessorUuid *gpuUuid, UvmGpuPlatformInfo *gpuInfo)
{
nvidia_stack_t *sp = NULL;
NV_STATUS status;
int rc;
if (nv_kmem_cache_alloc_stack(&sp) != 0)
return NV_ERR_NO_MEMORY;
rc = nvidia_dev_get_uuid(gpuUuid->uuid, sp);
if (rc == 0)
{
rc = nvidia_dev_get_pci_info(gpuUuid->uuid,
&gpuInfo->pci_dev,
&gpuInfo->dma_addressable_start,
&gpuInfo->dma_addressable_limit);
// Block GPU from entering GC6 while used by UVM.
if (rc == 0)
rc = nvidia_dev_block_gc6(gpuUuid->uuid, sp);
// Avoid leaking reference on GPU if we failed.
if (rc != 0)
nvidia_dev_put_uuid(gpuUuid->uuid, sp);
}
switch (rc)
{
case 0:
status = NV_OK;
break;
case -ENOMEM:
status = NV_ERR_NO_MEMORY;
break;
case -ENODEV:
status = NV_ERR_GPU_UUID_NOT_FOUND;
break;
default:
status = NV_ERR_GENERIC;
break;
}
nv_kmem_cache_free_stack(sp);
return status;
}
EXPORT_SYMBOL(nvUvmInterfaceRegisterGpu);
void nvUvmInterfaceUnregisterGpu(const NvProcessorUuid *gpuUuid)
{
nvidia_stack_t *sp = nvUvmGetSafeStack();
nvidia_dev_unblock_gc6(gpuUuid->uuid, sp);
nvidia_dev_put_uuid(gpuUuid->uuid, sp);
nvUvmFreeSafeStack(sp);
}
EXPORT_SYMBOL(nvUvmInterfaceUnregisterGpu);
NV_STATUS nvUvmInterfaceSessionCreate(uvmGpuSessionHandle *session,
UvmPlatformInfo *platformInfo)
{
nvidia_stack_t *sp = NULL;
NV_STATUS status;
if (nv_kmem_cache_alloc_stack(&sp) != 0)
{
return NV_ERR_NO_MEMORY;
}
memset(platformInfo, 0, sizeof(*platformInfo));
platformInfo->atsSupported = nv_ats_supported;
status = rm_gpu_ops_create_session(sp, (gpuSessionHandle *)session);
nv_kmem_cache_free_stack(sp);
return status;
}
EXPORT_SYMBOL(nvUvmInterfaceSessionCreate);
NV_STATUS nvUvmInterfaceSessionDestroy(uvmGpuSessionHandle session)
{
nvidia_stack_t *sp = nvUvmGetSafeStack();
NV_STATUS status;
status = rm_gpu_ops_destroy_session(sp, (gpuSessionHandle)session);
nvUvmFreeSafeStack(sp);
return status;
}
EXPORT_SYMBOL(nvUvmInterfaceSessionDestroy);
NV_STATUS nvUvmInterfaceDeviceCreate(uvmGpuSessionHandle session,
const UvmGpuInfo *pGpuInfo,
const NvProcessorUuid *gpuUuid,
uvmGpuDeviceHandle *device,
NvBool bCreateSmcPartition)
{
nvidia_stack_t *sp = NULL;
NV_STATUS status;
if (nv_kmem_cache_alloc_stack(&sp) != 0)
{
return NV_ERR_NO_MEMORY;
}
status = rm_gpu_ops_device_create(sp,
(gpuSessionHandle)session,
(const gpuInfo *)pGpuInfo,
gpuUuid,
(gpuDeviceHandle *)device,
bCreateSmcPartition);
nv_kmem_cache_free_stack(sp);
return status;
}
EXPORT_SYMBOL(nvUvmInterfaceDeviceCreate);
void nvUvmInterfaceDeviceDestroy(uvmGpuDeviceHandle device)
{
nvidia_stack_t *sp = nvUvmGetSafeStack();
rm_gpu_ops_device_destroy(sp, (gpuDeviceHandle)device);
nvUvmFreeSafeStack(sp);
}
EXPORT_SYMBOL(nvUvmInterfaceDeviceDestroy);
NV_STATUS nvUvmInterfaceDupAddressSpace(uvmGpuDeviceHandle device,
NvHandle hUserClient,
NvHandle hUserVASpace,
uvmGpuAddressSpaceHandle *vaSpace,
UvmGpuAddressSpaceInfo *vaSpaceInfo)
{
nvidia_stack_t *sp = NULL;
NV_STATUS status;
if (nv_kmem_cache_alloc_stack(&sp) != 0)
{
return NV_ERR_NO_MEMORY;
}
status = rm_gpu_ops_dup_address_space(sp,
(gpuDeviceHandle)device,
hUserClient,
hUserVASpace,
(gpuAddressSpaceHandle *)vaSpace,
vaSpaceInfo);
nv_kmem_cache_free_stack(sp);
return status;
}
EXPORT_SYMBOL(nvUvmInterfaceDupAddressSpace);
NV_STATUS nvUvmInterfaceAddressSpaceCreate(uvmGpuDeviceHandle device,
unsigned long long vaBase,
unsigned long long vaSize,
uvmGpuAddressSpaceHandle *vaSpace,
UvmGpuAddressSpaceInfo *vaSpaceInfo)
{
nvidia_stack_t *sp = NULL;
NV_STATUS status;
if (nv_kmem_cache_alloc_stack(&sp) != 0)
{
return NV_ERR_NO_MEMORY;
}
status = rm_gpu_ops_address_space_create(sp,
(gpuDeviceHandle)device,
vaBase,
vaSize,
(gpuAddressSpaceHandle *)vaSpace,
vaSpaceInfo);
nv_kmem_cache_free_stack(sp);
return status;
}
EXPORT_SYMBOL(nvUvmInterfaceAddressSpaceCreate);
void nvUvmInterfaceAddressSpaceDestroy(uvmGpuAddressSpaceHandle vaSpace)
{
nvidia_stack_t *sp = nvUvmGetSafeStack();
rm_gpu_ops_address_space_destroy(
sp, (gpuAddressSpaceHandle)vaSpace);
nvUvmFreeSafeStack(sp);
}
EXPORT_SYMBOL(nvUvmInterfaceAddressSpaceDestroy);
NV_STATUS nvUvmInterfaceMemoryAllocFB(uvmGpuAddressSpaceHandle vaSpace,
NvLength length, UvmGpuPointer * gpuPointer,
UvmGpuAllocInfo * allocInfo)
{
nvidia_stack_t *sp = NULL;
NV_STATUS status;
if (nv_kmem_cache_alloc_stack(&sp) != 0)
{
return NV_ERR_NO_MEMORY;
}
status = rm_gpu_ops_memory_alloc_fb(
sp, (gpuAddressSpaceHandle)vaSpace,
length, (NvU64 *) gpuPointer,
allocInfo);
nv_kmem_cache_free_stack(sp);
return status;
}
EXPORT_SYMBOL(nvUvmInterfaceMemoryAllocFB);
NV_STATUS nvUvmInterfaceMemoryAllocSys(uvmGpuAddressSpaceHandle vaSpace,
NvLength length, UvmGpuPointer * gpuPointer,
UvmGpuAllocInfo * allocInfo)
{
nvidia_stack_t *sp = NULL;
NV_STATUS status;
if (nv_kmem_cache_alloc_stack(&sp) != 0)
{
return NV_ERR_NO_MEMORY;
}
status = rm_gpu_ops_memory_alloc_sys(
sp, (gpuAddressSpaceHandle)vaSpace,
length, (NvU64 *) gpuPointer,
allocInfo);
nv_kmem_cache_free_stack(sp);
return status;
}
EXPORT_SYMBOL(nvUvmInterfaceMemoryAllocSys);
NV_STATUS nvUvmInterfaceGetP2PCaps(uvmGpuDeviceHandle device1,
uvmGpuDeviceHandle device2,
UvmGpuP2PCapsParams * p2pCapsParams)
{
nvidia_stack_t *sp = NULL;
NV_STATUS status;
if (nv_kmem_cache_alloc_stack(&sp) != 0)
{
return NV_ERR_NO_MEMORY;
}
status = rm_gpu_ops_get_p2p_caps(sp,
(gpuDeviceHandle)device1,
(gpuDeviceHandle)device2,
p2pCapsParams);
nv_kmem_cache_free_stack(sp);
return status;
}
EXPORT_SYMBOL(nvUvmInterfaceGetP2PCaps);
NV_STATUS nvUvmInterfaceGetPmaObject(uvmGpuDeviceHandle device,
void **pPma,
const UvmPmaStatistics **pPmaPubStats)
{
nvidia_stack_t *sp = NULL;
NV_STATUS status;
if (nv_kmem_cache_alloc_stack(&sp) != 0)
{
return NV_ERR_NO_MEMORY;
}
status = rm_gpu_ops_get_pma_object(sp, (gpuDeviceHandle)device, pPma, (const nvgpuPmaStatistics_t *)pPmaPubStats);
nv_kmem_cache_free_stack(sp);
return status;
}
EXPORT_SYMBOL(nvUvmInterfaceGetPmaObject);
NV_STATUS nvUvmInterfacePmaRegisterEvictionCallbacks(void *pPma,
uvmPmaEvictPagesCallback evictPages,
uvmPmaEvictRangeCallback evictRange,
void *callbackData)
{
nvidia_stack_t *sp = NULL;
NV_STATUS status;
if (nv_kmem_cache_alloc_stack(&sp) != 0)
{
return NV_ERR_NO_MEMORY;
}
status = rm_gpu_ops_pma_register_callbacks(sp, pPma, evictPages, evictRange, callbackData);
nv_kmem_cache_free_stack(sp);
return status;
}
EXPORT_SYMBOL(nvUvmInterfacePmaRegisterEvictionCallbacks);
void nvUvmInterfacePmaUnregisterEvictionCallbacks(void *pPma)
{
nvidia_stack_t *sp = nvUvmGetSafeStack();
rm_gpu_ops_pma_unregister_callbacks(sp, pPma);
nvUvmFreeSafeStack(sp);
}
EXPORT_SYMBOL(nvUvmInterfacePmaUnregisterEvictionCallbacks);
NV_STATUS nvUvmInterfacePmaAllocPages(void *pPma,
NvLength pageCount,
NvU32 pageSize,
UvmPmaAllocationOptions *pPmaAllocOptions,
NvU64 *pPages)
{
nvidia_stack_t *sp = NULL;
NV_STATUS status;
if (nv_kmem_cache_alloc_stack(&sp) != 0)
{
return NV_ERR_NO_MEMORY;
}
status = rm_gpu_ops_pma_alloc_pages(
sp, pPma,
pageCount,
pageSize,
(nvgpuPmaAllocationOptions_t)pPmaAllocOptions,
pPages);
nv_kmem_cache_free_stack(sp);
return status;
}
EXPORT_SYMBOL(nvUvmInterfacePmaAllocPages);
NV_STATUS nvUvmInterfacePmaPinPages(void *pPma,
NvU64 *pPages,
NvLength pageCount,
NvU32 pageSize,
NvU32 flags)
{
nvidia_stack_t *sp = NULL;
NV_STATUS status;
if (nv_kmem_cache_alloc_stack(&sp) != 0)
{
return NV_ERR_NO_MEMORY;
}
status = rm_gpu_ops_pma_pin_pages(sp, pPma, pPages, pageCount, pageSize, flags);
nv_kmem_cache_free_stack(sp);
return status;
}
EXPORT_SYMBOL(nvUvmInterfacePmaPinPages);
NV_STATUS nvUvmInterfacePmaUnpinPages(void *pPma,
NvU64 *pPages,
NvLength pageCount,
NvU32 pageSize)
{
nvidia_stack_t *sp = NULL;
NV_STATUS status;
if (nv_kmem_cache_alloc_stack(&sp) != 0)
{
return NV_ERR_NO_MEMORY;
}
status = rm_gpu_ops_pma_unpin_pages(sp, pPma, pPages, pageCount, pageSize);
nv_kmem_cache_free_stack(sp);
return status;
}
EXPORT_SYMBOL(nvUvmInterfacePmaUnpinPages);
void nvUvmInterfaceMemoryFree(uvmGpuAddressSpaceHandle vaSpace,
UvmGpuPointer gpuPointer)
{
nvidia_stack_t *sp = nvUvmGetSafeStack();
rm_gpu_ops_memory_free(
sp, (gpuAddressSpaceHandle)vaSpace,
(NvU64) gpuPointer);
nvUvmFreeSafeStack(sp);
}
EXPORT_SYMBOL(nvUvmInterfaceMemoryFree);
void nvUvmInterfacePmaFreePages(void *pPma,
NvU64 *pPages,
NvLength pageCount,
NvU32 pageSize,
NvU32 flags)
{
nvidia_stack_t *sp = nvUvmGetSafeStack();
rm_gpu_ops_pma_free_pages(sp, pPma, pPages, pageCount, pageSize, flags);
nvUvmFreeSafeStack(sp);
}
EXPORT_SYMBOL(nvUvmInterfacePmaFreePages);
NV_STATUS nvUvmInterfaceMemoryCpuMap(uvmGpuAddressSpaceHandle vaSpace,
UvmGpuPointer gpuPointer, NvLength length, void **cpuPtr,
NvU32 pageSize)
{
nvidia_stack_t *sp = NULL;
NV_STATUS status;
if (nv_kmem_cache_alloc_stack(&sp) != 0)
{
return NV_ERR_NO_MEMORY;
}
status = rm_gpu_ops_memory_cpu_map(
sp, (gpuAddressSpaceHandle)vaSpace,
(NvU64) gpuPointer, length, cpuPtr, pageSize);
nv_kmem_cache_free_stack(sp);
return status;
}
EXPORT_SYMBOL(nvUvmInterfaceMemoryCpuMap);
void nvUvmInterfaceMemoryCpuUnMap(uvmGpuAddressSpaceHandle vaSpace,
void *cpuPtr)
{
nvidia_stack_t *sp = nvUvmGetSafeStack();
rm_gpu_ops_memory_cpu_ummap(sp, (gpuAddressSpaceHandle)vaSpace, cpuPtr);
nvUvmFreeSafeStack(sp);
}
EXPORT_SYMBOL(nvUvmInterfaceMemoryCpuUnMap);
NV_STATUS nvUvmInterfaceChannelAllocate(uvmGpuAddressSpaceHandle vaSpace,
const UvmGpuChannelAllocParams *allocParams,
uvmGpuChannelHandle *channel,
UvmGpuChannelInfo *channelInfo)
{
nvidia_stack_t *sp = NULL;
NV_STATUS status;
if (nv_kmem_cache_alloc_stack(&sp) != 0)
{
return NV_ERR_NO_MEMORY;
}
status = rm_gpu_ops_channel_allocate(sp,
(gpuAddressSpaceHandle)vaSpace,
allocParams,
(gpuChannelHandle *)channel,
channelInfo);
nv_kmem_cache_free_stack(sp);
return status;
}
EXPORT_SYMBOL(nvUvmInterfaceChannelAllocate);
void nvUvmInterfaceChannelDestroy(uvmGpuChannelHandle channel)
{
nvidia_stack_t *sp = nvUvmGetSafeStack();
rm_gpu_ops_channel_destroy(sp, (gpuChannelHandle)channel);
nvUvmFreeSafeStack(sp);
}
EXPORT_SYMBOL(nvUvmInterfaceChannelDestroy);
NV_STATUS nvUvmInterfaceQueryCaps(uvmGpuDeviceHandle device,
UvmGpuCaps * caps)
{
nvidia_stack_t *sp = NULL;
NV_STATUS status;
if (nv_kmem_cache_alloc_stack(&sp) != 0)
{
return NV_ERR_NO_MEMORY;
}
status = rm_gpu_ops_query_caps(sp, (gpuDeviceHandle)device, caps);
nv_kmem_cache_free_stack(sp);
return status;
}
EXPORT_SYMBOL(nvUvmInterfaceQueryCaps);
NV_STATUS nvUvmInterfaceQueryCopyEnginesCaps(uvmGpuDeviceHandle device,
UvmGpuCopyEnginesCaps *caps)
{
nvidia_stack_t *sp = NULL;
NV_STATUS status;
if (nv_kmem_cache_alloc_stack(&sp) != 0)
{
return NV_ERR_NO_MEMORY;
}
status = rm_gpu_ops_query_ces_caps(sp, (gpuDeviceHandle)device, caps);
nv_kmem_cache_free_stack(sp);
return status;
}
EXPORT_SYMBOL(nvUvmInterfaceQueryCopyEnginesCaps);
NV_STATUS nvUvmInterfaceGetGpuInfo(const NvProcessorUuid *gpuUuid,
const UvmGpuClientInfo *pGpuClientInfo,
UvmGpuInfo *pGpuInfo)
{
nvidia_stack_t *sp = NULL;
NV_STATUS status;
if (nv_kmem_cache_alloc_stack(&sp) != 0)
{
return NV_ERR_NO_MEMORY;
}
status = rm_gpu_ops_get_gpu_info(sp, gpuUuid, pGpuClientInfo, pGpuInfo);
nv_kmem_cache_free_stack(sp);
return status;
}
EXPORT_SYMBOL(nvUvmInterfaceGetGpuInfo);
NV_STATUS nvUvmInterfaceServiceDeviceInterruptsRM(uvmGpuDeviceHandle device)
{
nvidia_stack_t *sp = NULL;
NV_STATUS status;
if (nv_kmem_cache_alloc_stack(&sp) != 0)
{
return NV_ERR_NO_MEMORY;
}
status = rm_gpu_ops_service_device_interrupts_rm(sp,
(gpuDeviceHandle)device);
nv_kmem_cache_free_stack(sp);
return status;
}
EXPORT_SYMBOL(nvUvmInterfaceServiceDeviceInterruptsRM);
NV_STATUS nvUvmInterfaceSetPageDirectory(uvmGpuAddressSpaceHandle vaSpace,
NvU64 physAddress, unsigned numEntries,
NvBool bVidMemAperture, NvU32 pasid)
{
nvidia_stack_t *sp = NULL;
NV_STATUS status;
if (nv_kmem_cache_alloc_stack(&sp) != 0)
{
return NV_ERR_NO_MEMORY;
}
status = rm_gpu_ops_set_page_directory(sp, (gpuAddressSpaceHandle)vaSpace,
physAddress, numEntries, bVidMemAperture, pasid);
nv_kmem_cache_free_stack(sp);
return status;
}
EXPORT_SYMBOL(nvUvmInterfaceSetPageDirectory);
NV_STATUS nvUvmInterfaceUnsetPageDirectory(uvmGpuAddressSpaceHandle vaSpace)
{
nvidia_stack_t *sp = nvUvmGetSafeStack();
NV_STATUS status;
status =
rm_gpu_ops_unset_page_directory(sp, (gpuAddressSpaceHandle)vaSpace);
nvUvmFreeSafeStack(sp);
return status;
}
EXPORT_SYMBOL(nvUvmInterfaceUnsetPageDirectory);
NV_STATUS nvUvmInterfaceDupAllocation(uvmGpuAddressSpaceHandle srcVaSpace,
NvU64 srcAddress,
uvmGpuAddressSpaceHandle dstVaSpace,
NvU64 *dstAddress)
{
nvidia_stack_t *sp = NULL;
NV_STATUS status;
if (nv_kmem_cache_alloc_stack(&sp) != 0)
{
return NV_ERR_NO_MEMORY;
}
status = rm_gpu_ops_dup_allocation(sp,
(gpuAddressSpaceHandle)srcVaSpace,
srcAddress,
(gpuAddressSpaceHandle)dstVaSpace,
dstAddress);
nv_kmem_cache_free_stack(sp);
return status;
}
EXPORT_SYMBOL(nvUvmInterfaceDupAllocation);
NV_STATUS nvUvmInterfaceDupMemory(uvmGpuDeviceHandle device,
NvHandle hClient,
NvHandle hPhysMemory,
NvHandle *hDupMemory,
UvmGpuMemoryInfo *pGpuMemoryInfo)
{
nvidia_stack_t *sp = NULL;
NV_STATUS status;
if (nv_kmem_cache_alloc_stack(&sp) != 0)
{
return NV_ERR_NO_MEMORY;
}
status = rm_gpu_ops_dup_memory(sp,
(gpuDeviceHandle)device,
hClient,
hPhysMemory,
hDupMemory,
pGpuMemoryInfo);
nv_kmem_cache_free_stack(sp);
return status;
}
EXPORT_SYMBOL(nvUvmInterfaceDupMemory);
NV_STATUS nvUvmInterfaceFreeDupedHandle(uvmGpuDeviceHandle device,
NvHandle hPhysHandle)
{
nvidia_stack_t *sp = nvUvmGetSafeStack();
NV_STATUS status;
status = rm_gpu_ops_free_duped_handle(sp,
(gpuDeviceHandle)device,
hPhysHandle);
nvUvmFreeSafeStack(sp);
return status;
}
EXPORT_SYMBOL(nvUvmInterfaceFreeDupedHandle);
NV_STATUS nvUvmInterfaceGetFbInfo(uvmGpuDeviceHandle device,
UvmGpuFbInfo * fbInfo)
{
nvidia_stack_t *sp = NULL;
NV_STATUS status;
if (nv_kmem_cache_alloc_stack(&sp) != 0)
{
return NV_ERR_NO_MEMORY;
}
status = rm_gpu_ops_get_fb_info(sp, (gpuDeviceHandle)device, fbInfo);
nv_kmem_cache_free_stack(sp);
return status;
}
EXPORT_SYMBOL(nvUvmInterfaceGetFbInfo);
NV_STATUS nvUvmInterfaceGetEccInfo(uvmGpuDeviceHandle device,
UvmGpuEccInfo * eccInfo)
{
nvidia_stack_t *sp = NULL;
NV_STATUS status;
if (nv_kmem_cache_alloc_stack(&sp) != 0)
{
return NV_ERR_NO_MEMORY;
}
status = rm_gpu_ops_get_ecc_info(sp, (gpuDeviceHandle)device, eccInfo);
nv_kmem_cache_free_stack(sp);
return status;
}
EXPORT_SYMBOL(nvUvmInterfaceGetEccInfo);
NV_STATUS nvUvmInterfaceOwnPageFaultIntr(uvmGpuDeviceHandle device, NvBool bOwnInterrupts)
{
nvidia_stack_t *sp = NULL;
NV_STATUS status;
if (nv_kmem_cache_alloc_stack(&sp) != 0)
{
return NV_ERR_NO_MEMORY;
}
status = rm_gpu_ops_own_page_fault_intr(sp, (gpuDeviceHandle)device, bOwnInterrupts);
nv_kmem_cache_free_stack(sp);
return status;
}
EXPORT_SYMBOL(nvUvmInterfaceOwnPageFaultIntr);
NV_STATUS nvUvmInterfaceInitFaultInfo(uvmGpuDeviceHandle device,
UvmGpuFaultInfo *pFaultInfo)
{
nvidia_stack_t *sp = NULL;
NV_STATUS status;
if (nv_kmem_cache_alloc_stack(&sp) != 0)
{
return NV_ERR_NO_MEMORY;
}
status = rm_gpu_ops_init_fault_info(sp,
(gpuDeviceHandle)device,
pFaultInfo);
// Preallocate a stack for functions called from ISR top half
pFaultInfo->nonReplayable.isr_sp = NULL;
pFaultInfo->nonReplayable.isr_bh_sp = NULL;
if (status == NV_OK)
{
// NOTE: nv_kmem_cache_alloc_stack does not allocate a stack on PPC.
// Therefore, the pointer can be NULL on success. Always use the
// returned error code to determine if the operation was successful.
int err = nv_kmem_cache_alloc_stack((nvidia_stack_t **)&pFaultInfo->nonReplayable.isr_sp);
if (!err)
{
err = nv_kmem_cache_alloc_stack((nvidia_stack_t **)&pFaultInfo->nonReplayable.isr_bh_sp);
if (err)
{
nv_kmem_cache_free_stack(pFaultInfo->nonReplayable.isr_sp);
pFaultInfo->nonReplayable.isr_sp = NULL;
}
}
if (err)
{
rm_gpu_ops_destroy_fault_info(sp,
(gpuDeviceHandle)device,
pFaultInfo);
status = NV_ERR_NO_MEMORY;
}
}
nv_kmem_cache_free_stack(sp);
return status;
}
EXPORT_SYMBOL(nvUvmInterfaceInitFaultInfo);
NV_STATUS nvUvmInterfaceInitAccessCntrInfo(uvmGpuDeviceHandle device,
UvmGpuAccessCntrInfo *pAccessCntrInfo)
{
nvidia_stack_t *sp = NULL;
NV_STATUS status;
if (nv_kmem_cache_alloc_stack(&sp) != 0)
{
return NV_ERR_NO_MEMORY;
}
status = rm_gpu_ops_init_access_cntr_info(sp,
(gpuDeviceHandle)device,
pAccessCntrInfo);
nv_kmem_cache_free_stack(sp);
return status;
}
EXPORT_SYMBOL(nvUvmInterfaceInitAccessCntrInfo);
NV_STATUS nvUvmInterfaceEnableAccessCntr(uvmGpuDeviceHandle device,
UvmGpuAccessCntrInfo *pAccessCntrInfo,
UvmGpuAccessCntrConfig *pAccessCntrConfig)
{
nvidia_stack_t *sp = NULL;
NV_STATUS status;
if (nv_kmem_cache_alloc_stack(&sp) != 0)
{
return NV_ERR_NO_MEMORY;
}
status = rm_gpu_ops_enable_access_cntr (sp,
(gpuDeviceHandle)device,
pAccessCntrInfo,
pAccessCntrConfig);
nv_kmem_cache_free_stack(sp);
return status;
}
EXPORT_SYMBOL(nvUvmInterfaceEnableAccessCntr);
NV_STATUS nvUvmInterfaceDestroyFaultInfo(uvmGpuDeviceHandle device,
UvmGpuFaultInfo *pFaultInfo)
{
nvidia_stack_t *sp = nvUvmGetSafeStack();
NV_STATUS status;
// Free the preallocated stack for functions called from ISR
if (pFaultInfo->nonReplayable.isr_sp != NULL)
{
nv_kmem_cache_free_stack((nvidia_stack_t *)pFaultInfo->nonReplayable.isr_sp);
pFaultInfo->nonReplayable.isr_sp = NULL;
}
if (pFaultInfo->nonReplayable.isr_bh_sp != NULL)
{
nv_kmem_cache_free_stack((nvidia_stack_t *)pFaultInfo->nonReplayable.isr_bh_sp);
pFaultInfo->nonReplayable.isr_bh_sp = NULL;
}
status = rm_gpu_ops_destroy_fault_info(sp,
(gpuDeviceHandle)device,
pFaultInfo);
nvUvmFreeSafeStack(sp);
return status;
}
EXPORT_SYMBOL(nvUvmInterfaceDestroyFaultInfo);
NV_STATUS nvUvmInterfaceHasPendingNonReplayableFaults(UvmGpuFaultInfo *pFaultInfo,
NvBool *hasPendingFaults)
{
return rm_gpu_ops_has_pending_non_replayable_faults(pFaultInfo->nonReplayable.isr_sp,
pFaultInfo,
hasPendingFaults);
}
EXPORT_SYMBOL(nvUvmInterfaceHasPendingNonReplayableFaults);
NV_STATUS nvUvmInterfaceGetNonReplayableFaults(UvmGpuFaultInfo *pFaultInfo,
void *pFaultBuffer,
NvU32 *numFaults)
{
return rm_gpu_ops_get_non_replayable_faults(pFaultInfo->nonReplayable.isr_bh_sp,
pFaultInfo,
pFaultBuffer,
numFaults);
}
EXPORT_SYMBOL(nvUvmInterfaceGetNonReplayableFaults);
NV_STATUS nvUvmInterfaceDestroyAccessCntrInfo(uvmGpuDeviceHandle device,
UvmGpuAccessCntrInfo *pAccessCntrInfo)
{
nvidia_stack_t *sp = nvUvmGetSafeStack();
NV_STATUS status;
status = rm_gpu_ops_destroy_access_cntr_info(sp,
(gpuDeviceHandle)device,
pAccessCntrInfo);
nvUvmFreeSafeStack(sp);
return status;
}
EXPORT_SYMBOL(nvUvmInterfaceDestroyAccessCntrInfo);
NV_STATUS nvUvmInterfaceDisableAccessCntr(uvmGpuDeviceHandle device,
UvmGpuAccessCntrInfo *pAccessCntrInfo)
{
nvidia_stack_t *sp = nvUvmGetSafeStack();
NV_STATUS status;
status = rm_gpu_ops_disable_access_cntr(sp,
(gpuDeviceHandle)device,
pAccessCntrInfo);
nvUvmFreeSafeStack(sp);
return status;
}
EXPORT_SYMBOL(nvUvmInterfaceDisableAccessCntr);
// this function is called by the UVM driver to register the ops
NV_STATUS nvUvmInterfaceRegisterUvmCallbacks(struct UvmOpsUvmEvents *importedUvmOps)
{
NV_STATUS status = NV_OK;
if (!importedUvmOps)
{
return NV_ERR_INVALID_ARGUMENT;
}
down(&g_pNvUvmEventsLock);
if (getUvmEvents() != NULL)
{
status = NV_ERR_IN_USE;
}
else
{
// Be careful: as soon as the pointer is assigned, top half ISRs can
// start reading it to make callbacks, even before we drop the lock.
setUvmEvents(importedUvmOps);
}
up(&g_pNvUvmEventsLock);
return status;
}
EXPORT_SYMBOL(nvUvmInterfaceRegisterUvmCallbacks);
static void flush_top_half(void *info)
{
// Prior top halves on this core must have completed for this callback to
// run at all, so we're done.
return;
}
void nvUvmInterfaceDeRegisterUvmOps(void)
{
// Taking the lock forces us to wait for non-interrupt callbacks to finish
// up.
down(&g_pNvUvmEventsLock);
setUvmEvents(NULL);
up(&g_pNvUvmEventsLock);
// We cleared the pointer so nv_uvm_event_interrupt can't invoke any new
// top half callbacks, but prior ones could still be executing on other
// cores. We can wait for them to finish by waiting for a context switch to
// happen on every core.
//
// This is slow, but since nvUvmInterfaceDeRegisterUvmOps is very rare
// (module unload) it beats having the top half synchronize with a spin lock
// every time.
//
// Note that since we dropped the lock, another set of callbacks could have
// already been registered. That's ok, since we just need to wait for old
// ones to finish.
on_each_cpu(flush_top_half, NULL, 1);
}
EXPORT_SYMBOL(nvUvmInterfaceDeRegisterUvmOps);
NV_STATUS nv_uvm_suspend(void)
{
NV_STATUS status = NV_OK;
struct UvmOpsUvmEvents *events;
// Synchronize callbacks with unregistration
down(&g_pNvUvmEventsLock);
// It's not strictly necessary to use a cached local copy of the events
// pointer here since it can't change under the lock, but we'll do it for
// consistency.
events = getUvmEvents();
if (events && events->suspend)
{
status = events->suspend();
}
up(&g_pNvUvmEventsLock);
return status;
}
NV_STATUS nv_uvm_resume(void)
{
NV_STATUS status = NV_OK;
struct UvmOpsUvmEvents *events;
// Synchronize callbacks with unregistration
down(&g_pNvUvmEventsLock);
// It's not strictly necessary to use a cached local copy of the events
// pointer here since it can't change under the lock, but we'll do it for
// consistency.
events = getUvmEvents();
if (events && events->resume)
{
status = events->resume();
}
up(&g_pNvUvmEventsLock);
return status;
}
void nv_uvm_notify_start_device(const NvU8 *pUuid)
{
NvProcessorUuid uvmUuid;
struct UvmOpsUvmEvents *events;
memcpy(uvmUuid.uuid, pUuid, UVM_UUID_LEN);
// Synchronize callbacks with unregistration
down(&g_pNvUvmEventsLock);
// It's not strictly necessary to use a cached local copy of the events
// pointer here since it can't change under the lock, but we'll do it for
// consistency.
events = getUvmEvents();
if(events && events->startDevice)
{
events->startDevice(&uvmUuid);
}
up(&g_pNvUvmEventsLock);
}
void nv_uvm_notify_stop_device(const NvU8 *pUuid)
{
NvProcessorUuid uvmUuid;
struct UvmOpsUvmEvents *events;
memcpy(uvmUuid.uuid, pUuid, UVM_UUID_LEN);
// Synchronize callbacks with unregistration
down(&g_pNvUvmEventsLock);
// It's not strictly necessary to use a cached local copy of the events
// pointer here since it can't change under the lock, but we'll do it for
// consistency.
events = getUvmEvents();
if(events && events->stopDevice)
{
events->stopDevice(&uvmUuid);
}
up(&g_pNvUvmEventsLock);
}
NV_STATUS nv_uvm_event_interrupt(const NvU8 *pUuid)
{
//
// This is called from interrupt context, so we can't take
// g_pNvUvmEventsLock to prevent the callbacks from being unregistered. Even
// if we could take the lock, we don't want to slow down the ISR more than
// absolutely necessary.
//
// Instead, we allow this function to be called concurrently with
// nvUvmInterfaceDeRegisterUvmOps. That function will clear the events
// pointer, then wait for all top halves to finish out. This means the
// pointer may change out from under us, but the callbacks are still safe to
// invoke while we're in this function.
//
// This requires that we read the pointer exactly once here so neither we
// nor the compiler make assumptions about the pointer remaining valid while
// in this function.
//
struct UvmOpsUvmEvents *events = getUvmEvents();
if (events && events->isrTopHalf)
return events->isrTopHalf((const NvProcessorUuid *)pUuid);
//
// NV_OK means that the interrupt was for the UVM driver, so use
// NV_ERR_NO_INTR_PENDING to tell the caller that we didn't do anything.
//
return NV_ERR_NO_INTR_PENDING;
}
NV_STATUS nvUvmInterfaceP2pObjectCreate(uvmGpuDeviceHandle device1,
uvmGpuDeviceHandle device2,
NvHandle *hP2pObject)
{
nvidia_stack_t *sp = NULL;
NV_STATUS status;
if (nv_kmem_cache_alloc_stack(&sp) != 0)
{
return NV_ERR_NO_MEMORY;
}
status = rm_gpu_ops_p2p_object_create(sp,
(gpuDeviceHandle)device1,
(gpuDeviceHandle)device2,
hP2pObject);
nv_kmem_cache_free_stack(sp);
return status;
}
EXPORT_SYMBOL(nvUvmInterfaceP2pObjectCreate);
void nvUvmInterfaceP2pObjectDestroy(uvmGpuSessionHandle session,
NvHandle hP2pObject)
{
nvidia_stack_t *sp = nvUvmGetSafeStack();
rm_gpu_ops_p2p_object_destroy(sp, (gpuSessionHandle)session, hP2pObject);
nvUvmFreeSafeStack(sp);
}
EXPORT_SYMBOL(nvUvmInterfaceP2pObjectDestroy);
NV_STATUS nvUvmInterfaceGetExternalAllocPtes(uvmGpuAddressSpaceHandle vaSpace,
NvHandle hDupedMemory,
NvU64 offset,
NvU64 size,
UvmGpuExternalMappingInfo *gpuExternalMappingInfo)
{
nvidia_stack_t *sp = NULL;
NV_STATUS status;
if (nv_kmem_cache_alloc_stack(&sp) != 0)
{
return NV_ERR_NO_MEMORY;
}
status = rm_gpu_ops_get_external_alloc_ptes(sp,
(gpuAddressSpaceHandle)vaSpace,
hDupedMemory,
offset,
size,
gpuExternalMappingInfo);
nv_kmem_cache_free_stack(sp);
return status;
}
EXPORT_SYMBOL(nvUvmInterfaceGetExternalAllocPtes);
NV_STATUS nvUvmInterfaceRetainChannel(uvmGpuAddressSpaceHandle vaSpace,
NvHandle hClient,
NvHandle hChannel,
void **retainedChannel,
UvmGpuChannelInstanceInfo *channelInstanceInfo)
{
nvidia_stack_t *sp = NULL;
NV_STATUS status;
if (nv_kmem_cache_alloc_stack(&sp) != 0)
{
return NV_ERR_NO_MEMORY;
}
status = rm_gpu_ops_retain_channel(sp,
(gpuAddressSpaceHandle)vaSpace,
hClient,
hChannel,
retainedChannel,
channelInstanceInfo);
nv_kmem_cache_free_stack(sp);
return status;
}
EXPORT_SYMBOL(nvUvmInterfaceRetainChannel);
NV_STATUS nvUvmInterfaceBindChannelResources(void *retainedChannel,
UvmGpuChannelResourceBindParams *channelResourceBindParams)
{
nvidia_stack_t *sp = NULL;
NV_STATUS status;
if (nv_kmem_cache_alloc_stack(&sp) != 0)
{
return NV_ERR_NO_MEMORY;
}
status = rm_gpu_ops_bind_channel_resources(sp,
retainedChannel,
channelResourceBindParams);
nv_kmem_cache_free_stack(sp);
return status;
}
EXPORT_SYMBOL(nvUvmInterfaceBindChannelResources);
void nvUvmInterfaceReleaseChannel(void *retainedChannel)
{
nvidia_stack_t *sp = nvUvmGetSafeStack();
rm_gpu_ops_release_channel(sp, retainedChannel);
nvUvmFreeSafeStack(sp);
}
EXPORT_SYMBOL(nvUvmInterfaceReleaseChannel);
void nvUvmInterfaceStopChannel(void *retainedChannel, NvBool bImmediate)
{
nvidia_stack_t *sp = nvUvmGetSafeStack();
rm_gpu_ops_stop_channel(sp, retainedChannel, bImmediate);
nvUvmFreeSafeStack(sp);
}
EXPORT_SYMBOL(nvUvmInterfaceStopChannel);
NV_STATUS nvUvmInterfaceGetChannelResourcePtes(uvmGpuAddressSpaceHandle vaSpace,
NvP64 resourceDescriptor,
NvU64 offset,
NvU64 size,
UvmGpuExternalMappingInfo *externalMappingInfo)
{
nvidia_stack_t *sp = NULL;
NV_STATUS status;
if (nv_kmem_cache_alloc_stack(&sp) != 0)
{
return NV_ERR_NO_MEMORY;
}
status = rm_gpu_ops_get_channel_resource_ptes(sp,
(gpuAddressSpaceHandle)vaSpace,
resourceDescriptor,
offset,
size,
externalMappingInfo);
nv_kmem_cache_free_stack(sp);
return status;
}
EXPORT_SYMBOL(nvUvmInterfaceGetChannelResourcePtes);
NV_STATUS nvUvmInterfaceReportNonReplayableFault(uvmGpuDeviceHandle device,
const void *pFaultPacket)
{
nvidia_stack_t *sp = nvUvmGetSafeStack();
NV_STATUS status;
status = rm_gpu_ops_report_non_replayable_fault(sp, (gpuDeviceHandle)device, pFaultPacket);
nvUvmFreeSafeStack(sp);
return status;
}
EXPORT_SYMBOL(nvUvmInterfaceReportNonReplayableFault);
NV_STATUS nvUvmInterfacePagingChannelAllocate(uvmGpuDeviceHandle device,
const UvmGpuPagingChannelAllocParams *allocParams,
UvmGpuPagingChannelHandle *channel,
UvmGpuPagingChannelInfo *channelInfo)
{
nvidia_stack_t *sp = NULL;
nvidia_stack_t *pushStreamSp = NULL;
NV_STATUS status;
if (nv_kmem_cache_alloc_stack(&sp) != 0)
return NV_ERR_NO_MEMORY;
if (nv_kmem_cache_alloc_stack(&pushStreamSp) != 0)
{
nv_kmem_cache_free_stack(sp);
return NV_ERR_NO_MEMORY;
}
status = rm_gpu_ops_paging_channel_allocate(sp,
(gpuDeviceHandle)device,
allocParams,
(gpuPagingChannelHandle *)channel,
channelInfo);
if (status == NV_OK)
(*channel)->pushStreamSp = pushStreamSp;
else
nv_kmem_cache_free_stack(pushStreamSp);
nv_kmem_cache_free_stack(sp);
return status;
}
EXPORT_SYMBOL(nvUvmInterfacePagingChannelAllocate);
void nvUvmInterfacePagingChannelDestroy(UvmGpuPagingChannelHandle channel)
{
nvidia_stack_t *sp;
if (channel == NULL)
return;
sp = nvUvmGetSafeStack();
nv_kmem_cache_free_stack(channel->pushStreamSp);
rm_gpu_ops_paging_channel_destroy(sp, (gpuPagingChannelHandle)channel);
nvUvmFreeSafeStack(sp);
}
EXPORT_SYMBOL(nvUvmInterfacePagingChannelDestroy);
NV_STATUS nvUvmInterfacePagingChannelsMap(uvmGpuAddressSpaceHandle srcVaSpace,
UvmGpuPointer srcAddress,
uvmGpuDeviceHandle device,
NvU64 *dstAddress)
{
nvidia_stack_t *sp = NULL;
NV_STATUS status;
if (nv_kmem_cache_alloc_stack(&sp) != 0)
return NV_ERR_NO_MEMORY;
status = rm_gpu_ops_paging_channels_map(sp,
(gpuAddressSpaceHandle)srcVaSpace,
(NvU64)srcAddress,
(gpuDeviceHandle)device,
dstAddress);
nv_kmem_cache_free_stack(sp);
return status;
}
EXPORT_SYMBOL(nvUvmInterfacePagingChannelsMap);
void nvUvmInterfacePagingChannelsUnmap(uvmGpuAddressSpaceHandle srcVaSpace,
UvmGpuPointer srcAddress,
uvmGpuDeviceHandle device)
{
nvidia_stack_t *sp = nvUvmGetSafeStack();
rm_gpu_ops_paging_channels_unmap(sp,
(gpuAddressSpaceHandle)srcVaSpace,
(NvU64)srcAddress,
(gpuDeviceHandle)device);
nvUvmFreeSafeStack(sp);
}
EXPORT_SYMBOL(nvUvmInterfacePagingChannelsUnmap);
NV_STATUS nvUvmInterfacePagingChannelPushStream(UvmGpuPagingChannelHandle channel,
char *methodStream,
NvU32 methodStreamSize)
{
return rm_gpu_ops_paging_channel_push_stream(channel->pushStreamSp,
(gpuPagingChannelHandle)channel,
methodStream,
methodStreamSize);
}
EXPORT_SYMBOL(nvUvmInterfacePagingChannelPushStream);
#else // NV_UVM_ENABLE
NV_STATUS nv_uvm_suspend(void)
{
return NV_OK;
}
NV_STATUS nv_uvm_resume(void)
{
return NV_OK;
}
#endif // NV_UVM_ENABLE
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