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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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147b5983bb
this lock is used for sriov_gpu_reset, only get this mutex can run into sriov_gpu_reset. we have couple source triggers gpu_reset for SRIOV: 1) submit timedout and trigger reset voluntarily 2) invalid instruction detected by ENGINE and trigger reset voluntarily 2) hypervisor found world switch hang and trigger flr and notify guest to do reset. all need take care and we need a mutex to protect the consistency of reset routine. Signed-off-by: Monk Liu <Monk.Liu@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
96 lines
3.5 KiB
C
96 lines
3.5 KiB
C
/*
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* Copyright 2016 Advanced Micro Devices, Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Author: Monk.liu@amd.com
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*/
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#ifndef AMDGPU_VIRT_H
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#define AMDGPU_VIRT_H
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#define AMDGPU_SRIOV_CAPS_SRIOV_VBIOS (1 << 0) /* vBIOS is sr-iov ready */
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#define AMDGPU_SRIOV_CAPS_ENABLE_IOV (1 << 1) /* sr-iov is enabled on this GPU */
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#define AMDGPU_SRIOV_CAPS_IS_VF (1 << 2) /* this GPU is a virtual function */
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#define AMDGPU_PASSTHROUGH_MODE (1 << 3) /* thw whole GPU is pass through for VM */
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#define AMDGPU_SRIOV_CAPS_RUNTIME (1 << 4) /* is out of full access mode */
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/**
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* struct amdgpu_virt_ops - amdgpu device virt operations
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*/
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struct amdgpu_virt_ops {
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int (*req_full_gpu)(struct amdgpu_device *adev, bool init);
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int (*rel_full_gpu)(struct amdgpu_device *adev, bool init);
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int (*reset_gpu)(struct amdgpu_device *adev);
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};
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/* GPU virtualization */
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struct amdgpu_virt {
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uint32_t caps;
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struct amdgpu_bo *csa_obj;
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uint64_t csa_vmid0_addr;
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bool chained_ib_support;
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uint32_t reg_val_offs;
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struct mutex lock_kiq;
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struct mutex lock_reset;
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struct amdgpu_irq_src ack_irq;
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struct amdgpu_irq_src rcv_irq;
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struct delayed_work flr_work;
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const struct amdgpu_virt_ops *ops;
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};
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#define AMDGPU_CSA_SIZE (8 * 1024)
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#define AMDGPU_CSA_VADDR (AMDGPU_VA_RESERVED_SIZE - AMDGPU_CSA_SIZE)
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#define amdgpu_sriov_enabled(adev) \
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((adev)->virt.caps & AMDGPU_SRIOV_CAPS_ENABLE_IOV)
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#define amdgpu_sriov_vf(adev) \
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((adev)->virt.caps & AMDGPU_SRIOV_CAPS_IS_VF)
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#define amdgpu_sriov_bios(adev) \
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((adev)->virt.caps & AMDGPU_SRIOV_CAPS_SRIOV_VBIOS)
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#define amdgpu_sriov_runtime(adev) \
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((adev)->virt.caps & AMDGPU_SRIOV_CAPS_RUNTIME)
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#define amdgpu_passthrough(adev) \
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((adev)->virt.caps & AMDGPU_PASSTHROUGH_MODE)
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static inline bool is_virtual_machine(void)
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{
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#ifdef CONFIG_X86
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return boot_cpu_has(X86_FEATURE_HYPERVISOR);
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#else
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return false;
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#endif
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}
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struct amdgpu_vm;
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int amdgpu_allocate_static_csa(struct amdgpu_device *adev);
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int amdgpu_map_static_csa(struct amdgpu_device *adev, struct amdgpu_vm *vm);
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void amdgpu_virt_init_setting(struct amdgpu_device *adev);
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uint32_t amdgpu_virt_kiq_rreg(struct amdgpu_device *adev, uint32_t reg);
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void amdgpu_virt_kiq_wreg(struct amdgpu_device *adev, uint32_t reg, uint32_t v);
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int amdgpu_virt_request_full_gpu(struct amdgpu_device *adev, bool init);
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int amdgpu_virt_release_full_gpu(struct amdgpu_device *adev, bool init);
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int amdgpu_virt_reset_gpu(struct amdgpu_device *adev);
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int amdgpu_sriov_gpu_reset(struct amdgpu_device *adev, bool voluntary);
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#endif
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