From: Philip Yang Philip.Yang@amd.com
Register vram memory as MEMORY_DEVICE_PRIVATE type resource, to allocate vram backing pages for page migration.
Signed-off-by: Philip Yang Philip.Yang@amd.com Signed-off-by: Felix Kuehling Felix.Kuehling@amd.com --- drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c | 3 + drivers/gpu/drm/amd/amdkfd/Makefile | 3 +- drivers/gpu/drm/amd/amdkfd/kfd_migrate.c | 101 +++++++++++++++++++++ drivers/gpu/drm/amd/amdkfd/kfd_migrate.h | 48 ++++++++++ drivers/gpu/drm/amd/amdkfd/kfd_priv.h | 3 + 5 files changed, 157 insertions(+), 1 deletion(-) create mode 100644 drivers/gpu/drm/amd/amdkfd/kfd_migrate.c create mode 100644 drivers/gpu/drm/amd/amdkfd/kfd_migrate.h
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c index db96d69eb45e..562bb5b69137 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c @@ -30,6 +30,7 @@ #include <linux/dma-buf.h> #include "amdgpu_xgmi.h" #include <uapi/linux/kfd_ioctl.h> +#include "kfd_migrate.h"
/* Total memory size in system memory and all GPU VRAM. Used to * estimate worst case amount of memory to reserve for page tables @@ -170,12 +171,14 @@ void amdgpu_amdkfd_device_init(struct amdgpu_device *adev) }
kgd2kfd_device_init(adev->kfd.dev, adev_to_drm(adev), &gpu_resources); + svm_migrate_init(adev); } }
void amdgpu_amdkfd_device_fini(struct amdgpu_device *adev) { if (adev->kfd.dev) { + svm_migrate_fini(adev); kgd2kfd_device_exit(adev->kfd.dev); adev->kfd.dev = NULL; } diff --git a/drivers/gpu/drm/amd/amdkfd/Makefile b/drivers/gpu/drm/amd/amdkfd/Makefile index 387ce0217d35..a93301dbc464 100644 --- a/drivers/gpu/drm/amd/amdkfd/Makefile +++ b/drivers/gpu/drm/amd/amdkfd/Makefile @@ -55,7 +55,8 @@ AMDKFD_FILES := $(AMDKFD_PATH)/kfd_module.o \ $(AMDKFD_PATH)/kfd_dbgmgr.o \ $(AMDKFD_PATH)/kfd_smi_events.o \ $(AMDKFD_PATH)/kfd_crat.o \ - $(AMDKFD_PATH)/kfd_svm.o + $(AMDKFD_PATH)/kfd_svm.o \ + $(AMDKFD_PATH)/kfd_migrate.o
ifneq ($(CONFIG_AMD_IOMMU_V2),) AMDKFD_FILES += $(AMDKFD_PATH)/kfd_iommu.o diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c b/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c new file mode 100644 index 000000000000..1950b86f1562 --- /dev/null +++ b/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c @@ -0,0 +1,101 @@ +/* + * Copyright 2020 Advanced Micro Devices, Inc. + * + * 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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. + */ + +#include <linux/types.h> +#include <linux/hmm.h> +#include <linux/dma-direction.h> +#include <linux/dma-mapping.h> +#include "amdgpu_sync.h" +#include "amdgpu_object.h" +#include "amdgpu_vm.h" +#include "amdgpu_mn.h" +#include "kfd_priv.h" +#include "kfd_svm.h" +#include "kfd_migrate.h" + +static void svm_migrate_page_free(struct page *page) +{ +} + +/** + * svm_migrate_to_ram - CPU page fault handler + * @vmf: CPU vm fault vma, address + * + * Context: vm fault handler, mm->mmap_sem is taken + * + * Return: + * 0 - OK + * VM_FAULT_SIGBUS - notice application to have SIGBUS page fault + */ +static vm_fault_t svm_migrate_to_ram(struct vm_fault *vmf) +{ + return VM_FAULT_SIGBUS; +} + +static const struct dev_pagemap_ops svm_migrate_pgmap_ops = { + .page_free = svm_migrate_page_free, + .migrate_to_ram = svm_migrate_to_ram, +}; + +int svm_migrate_init(struct amdgpu_device *adev) +{ + struct kfd_dev *kfddev = adev->kfd.dev; + struct dev_pagemap *pgmap; + struct resource *res; + unsigned long size; + void *r; + + /* Page migration works on Vega10 or newer */ + if (kfddev->device_info->asic_family < CHIP_VEGA10) + return -EINVAL; + + pgmap = &kfddev->pgmap; + memset(pgmap, 0, sizeof(*pgmap)); + + /* TODO: register all vram to HMM for now. + * should remove reserved size + */ + size = ALIGN(adev->gmc.real_vram_size, 2ULL << 20); + res = devm_request_free_mem_region(adev->dev, &iomem_resource, size); + if (IS_ERR(res)) + return -ENOMEM; + + pgmap->type = MEMORY_DEVICE_PRIVATE; + pgmap->res = *res; + pgmap->ops = &svm_migrate_pgmap_ops; + pgmap->owner = adev; + pgmap->flags = MIGRATE_VMA_SELECT_DEVICE_PRIVATE; + r = devm_memremap_pages(adev->dev, pgmap); + if (IS_ERR(r)) { + pr_err("failed to register HMM device memory\n"); + return PTR_ERR(r); + } + + pr_info("HMM registered %ldMB device memory\n", size >> 20); + + return 0; +} + +void svm_migrate_fini(struct amdgpu_device *adev) +{ + memunmap_pages(&adev->kfd.dev->pgmap); +} diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_migrate.h b/drivers/gpu/drm/amd/amdkfd/kfd_migrate.h new file mode 100644 index 000000000000..98ab685d3e17 --- /dev/null +++ b/drivers/gpu/drm/amd/amdkfd/kfd_migrate.h @@ -0,0 +1,48 @@ +/* + * Copyright 2020 Advanced Micro Devices, Inc. + * + * 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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. + * + */ + +#ifndef KFD_MIGRATE_H_ +#define KFD_MIGRATE_H_ + +#include <linux/rwsem.h> +#include <linux/list.h> +#include <linux/mutex.h> +#include <linux/sched/mm.h> +#include <linux/hmm.h> +#include "kfd_priv.h" +#include "kfd_svm.h" + +#if defined(CONFIG_DEVICE_PRIVATE) +int svm_migrate_init(struct amdgpu_device *adev); +void svm_migrate_fini(struct amdgpu_device *adev); + +#else +static inline int svm_migrate_init(struct amdgpu_device *adev) +{ + DRM_WARN_ONCE("DEVICE_PRIVATE kernel config option is not enabled, " + "add CONFIG_DEVICE_PRIVATE=y in config file to fix\n"); + return -ENODEV; +} +static inline void svm_migrate_fini(struct amdgpu_device *adev) {} +#endif +#endif /* KFD_MIGRATE_H_ */ diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h index 7a4b4b6dcf32..d5367e770b39 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h +++ b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h @@ -317,6 +317,9 @@ struct kfd_dev { unsigned int max_doorbell_slices;
int noretry; + + /* HMM page migration MEMORY_DEVICE_PRIVATE mapping */ + struct dev_pagemap pgmap; };
enum kfd_mempool {