diff options
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c | 221 |
1 files changed, 221 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c new file mode 100644 index 000000000000..dcfb7df3caf4 --- /dev/null +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c @@ -0,0 +1,221 @@ +/* + * Copyright 2016 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 "amdgpu.h" + +int amdgpu_allocate_static_csa(struct amdgpu_device *adev) +{ + int r; + void *ptr; + + r = amdgpu_bo_create_kernel(adev, AMDGPU_CSA_SIZE, PAGE_SIZE, + AMDGPU_GEM_DOMAIN_VRAM, &adev->virt.csa_obj, + &adev->virt.csa_vmid0_addr, &ptr); + if (r) + return r; + + memset(ptr, 0, AMDGPU_CSA_SIZE); + return 0; +} + +/* + * amdgpu_map_static_csa should be called during amdgpu_vm_init + * it maps virtual address "AMDGPU_VA_RESERVED_SIZE - AMDGPU_CSA_SIZE" + * to this VM, and each command submission of GFX should use this virtual + * address within META_DATA init package to support SRIOV gfx preemption. + */ + +int amdgpu_map_static_csa(struct amdgpu_device *adev, struct amdgpu_vm *vm) +{ + int r; + struct amdgpu_bo_va *bo_va; + struct ww_acquire_ctx ticket; + struct list_head list; + struct amdgpu_bo_list_entry pd; + struct ttm_validate_buffer csa_tv; + + INIT_LIST_HEAD(&list); + INIT_LIST_HEAD(&csa_tv.head); + csa_tv.bo = &adev->virt.csa_obj->tbo; + csa_tv.shared = true; + + list_add(&csa_tv.head, &list); + amdgpu_vm_get_pd_bo(vm, &list, &pd); + + r = ttm_eu_reserve_buffers(&ticket, &list, true, NULL); + if (r) { + DRM_ERROR("failed to reserve CSA,PD BOs: err=%d\n", r); + return r; + } + + bo_va = amdgpu_vm_bo_add(adev, vm, adev->virt.csa_obj); + if (!bo_va) { + ttm_eu_backoff_reservation(&ticket, &list); + DRM_ERROR("failed to create bo_va for static CSA\n"); + return -ENOMEM; + } + + r = amdgpu_vm_bo_map(adev, bo_va, AMDGPU_CSA_VADDR, 0,AMDGPU_CSA_SIZE, + AMDGPU_PTE_READABLE | AMDGPU_PTE_WRITEABLE | + AMDGPU_PTE_EXECUTABLE); + + if (r) { + DRM_ERROR("failed to do bo_map on static CSA, err=%d\n", r); + amdgpu_vm_bo_rmv(adev, bo_va); + ttm_eu_backoff_reservation(&ticket, &list); + return r; + } + + vm->csa_bo_va = bo_va; + ttm_eu_backoff_reservation(&ticket, &list); + return 0; +} + +void amdgpu_virt_init_setting(struct amdgpu_device *adev) +{ + /* enable virtual display */ + adev->mode_info.num_crtc = 1; + adev->enable_virtual_display = true; + + mutex_init(&adev->virt.lock); +} + +uint32_t amdgpu_virt_kiq_rreg(struct amdgpu_device *adev, uint32_t reg) +{ + signed long r; + uint32_t val; + struct dma_fence *f; + struct amdgpu_kiq *kiq = &adev->gfx.kiq; + struct amdgpu_ring *ring = &kiq->ring; + + BUG_ON(!ring->funcs->emit_rreg); + + mutex_lock(&adev->virt.lock); + amdgpu_ring_alloc(ring, 32); + amdgpu_ring_emit_hdp_flush(ring); + amdgpu_ring_emit_rreg(ring, reg); + amdgpu_ring_emit_hdp_invalidate(ring); + amdgpu_fence_emit(ring, &f); + amdgpu_ring_commit(ring); + mutex_unlock(&adev->virt.lock); + + r = dma_fence_wait(f, false); + if (r) + DRM_ERROR("wait for kiq fence error: %ld.\n", r); + dma_fence_put(f); + + val = adev->wb.wb[adev->virt.reg_val_offs]; + + return val; +} + +void amdgpu_virt_kiq_wreg(struct amdgpu_device *adev, uint32_t reg, uint32_t v) +{ + signed long r; + struct dma_fence *f; + struct amdgpu_kiq *kiq = &adev->gfx.kiq; + struct amdgpu_ring *ring = &kiq->ring; + + BUG_ON(!ring->funcs->emit_wreg); + + mutex_lock(&adev->virt.lock); + amdgpu_ring_alloc(ring, 32); + amdgpu_ring_emit_hdp_flush(ring); + amdgpu_ring_emit_wreg(ring, reg, v); + amdgpu_ring_emit_hdp_invalidate(ring); + amdgpu_fence_emit(ring, &f); + amdgpu_ring_commit(ring); + mutex_unlock(&adev->virt.lock); + + r = dma_fence_wait(f, false); + if (r) + DRM_ERROR("wait for kiq fence error: %ld.\n", r); + dma_fence_put(f); +} + +/** + * amdgpu_virt_request_full_gpu() - request full gpu access + * @amdgpu: amdgpu device. + * @init: is driver init time. + * When start to init/fini driver, first need to request full gpu access. + * Return: Zero if request success, otherwise will return error. + */ +int amdgpu_virt_request_full_gpu(struct amdgpu_device *adev, bool init) +{ + struct amdgpu_virt *virt = &adev->virt; + int r; + + if (virt->ops && virt->ops->req_full_gpu) { + r = virt->ops->req_full_gpu(adev, init); + if (r) + return r; + + adev->virt.caps &= ~AMDGPU_SRIOV_CAPS_RUNTIME; + } + + return 0; +} + +/** + * amdgpu_virt_release_full_gpu() - release full gpu access + * @amdgpu: amdgpu device. + * @init: is driver init time. + * When finishing driver init/fini, need to release full gpu access. + * Return: Zero if release success, otherwise will returen error. + */ +int amdgpu_virt_release_full_gpu(struct amdgpu_device *adev, bool init) +{ + struct amdgpu_virt *virt = &adev->virt; + int r; + + if (virt->ops && virt->ops->rel_full_gpu) { + r = virt->ops->rel_full_gpu(adev, init); + if (r) + return r; + + adev->virt.caps |= AMDGPU_SRIOV_CAPS_RUNTIME; + } + return 0; +} + +/** + * amdgpu_virt_reset_gpu() - reset gpu + * @amdgpu: amdgpu device. + * Send reset command to GPU hypervisor to reset GPU that VM is using + * Return: Zero if reset success, otherwise will return error. + */ +int amdgpu_virt_reset_gpu(struct amdgpu_device *adev) +{ + struct amdgpu_virt *virt = &adev->virt; + int r; + + if (virt->ops && virt->ops->reset_gpu) { + r = virt->ops->reset_gpu(adev); + if (r) + return r; + + adev->virt.caps &= ~AMDGPU_SRIOV_CAPS_RUNTIME; + } + + return 0; +} |