drm/amdgpu:add new file for SRIOV

for SRIOV usage, CSA is only used per device and each
VM will map on it.

Signed-off-by: Monk Liu <Monk.Liu@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 93 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..cfc47214161a
--- /dev/null
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
@@ -0,0 +1,93 @@
+/*
+ * 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);
+		kfree(bo_va);
+		return r;
+	}
+
+	vm->csa_bo_va = bo_va;
+	ttm_eu_backoff_reservation(&ticket, &list);
+	return 0;
+}