for SRIOV usage, CSA is only used per device and each
VM will map on it.
Change-Id: Ibc63d87be59d7d89b96117e4d1b7e970a872580d
Signed-off-by: Monk Liu <Monk.Liu at amd.com>
---
drivers/gpu/drm/amd/amdgpu/Makefile | 2 +-
drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c | 105 +++++++++++++++++++++++++++++++
drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h | 5 ++
3 files changed, 111 insertions(+), 1 deletion(-)
create mode 100644 drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
diff --git a/drivers/gpu/drm/amd/amdgpu/Makefile b/drivers/gpu/drm/amd/amdgpu/Makefile
index 4185b03..0b8e470 100644
--- a/drivers/gpu/drm/amd/amdgpu/Makefile
+++ b/drivers/gpu/drm/amd/amdgpu/Makefile
@@ -30,7 +30,7 @@ amdgpu-y += amdgpu_device.o amdgpu_kms.o \
atombios_encoders.o amdgpu_sa.o atombios_i2c.o \
amdgpu_prime.o amdgpu_vm.o amdgpu_ib.o amdgpu_pll.o \
amdgpu_ucode.o amdgpu_bo_list.o amdgpu_ctx.o amdgpu_sync.o \
- amdgpu_gtt_mgr.o amdgpu_vram_mgr.o
+ amdgpu_gtt_mgr.o amdgpu_vram_mgr.o amdgpu_virt.o
# add asic specific block
amdgpu-$(CONFIG_DRM_AMDGPU_CIK)+= cik.o cik_ih.o kv_smc.o kv_dpm.o \
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 0000000..243fa10
--- /dev/null
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
@@ -0,0 +1,105 @@
+/*
+ * 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, adev->virt.csa_size, PAGE_SIZE,
+ AMDGPU_GEM_DOMAIN_VRAM, &adev->virt.csa_obj,
+ &adev->virt.csa_vmid0_addr, &ptr);
+ if (r)
+ return r;
+
+ /* gds part take the bottom half buffer */
+ adev->virt.gds_vmid0_addr = adev->virt.csa_vmid0_addr + PAGE_SIZE;
+ memset(ptr, 0, adev->virt.csa_size);
+ return 0;
+}
+
+void amdgpu_deallocate_static_csa(struct amdgpu_device *adev)
+{
+ amdgpu_bo_free_kernel(&adev->virt.csa_obj, &adev->virt.csa_vmid0_addr, NULL);
+}
+
+/*
+ * amdgpu_map_static_csa should be called during amdgpu_vm_init
+ * it maps virtual address "AMDGPU_VA_RESERVED_SIZE - adev->virt.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;
+ uint64_t vaddr;
+ struct amdgpu_bo_va *bo_va;
+ struct ww_acquire_ctx ticket;
+ struct list_head list, duplicates;
+ struct amdgpu_bo_list_entry pd;
+
+ INIT_LIST_HEAD(&list);
+ INIT_LIST_HEAD(&duplicates);
+ INIT_LIST_HEAD(&vm->vm_virt.csa_tv.head);
+ vm->vm_virt.csa_tv.bo = &adev->virt.csa_obj->tbo;
+ vm->vm_virt.csa_tv.shared = true;
+
+ list_add(&vm->vm_virt.csa_tv.head, &list);
+ amdgpu_vm_get_pd_bo(vm, &list, &pd);
+
+ vaddr = AMDGPU_VA_RESERVED_SIZE - adev->virt.csa_size;
+ r = ttm_eu_reserve_buffers(&ticket, &list, true, &duplicates);
+ 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, vaddr, 0, adev->virt.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;
+ }
+
+ ttm_eu_backoff_reservation(&ticket, &list);
+
+ vm->vm_virt.csa_bo_va = bo_va;
+ vm->vm_virt.vm_csa_addr = vaddr;
+ vm->vm_virt.vm_gds_addr = vaddr + PAGE_SIZE;
+ return 0;
+}
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h
index cc36d28..827162a 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h
@@ -68,4 +68,9 @@ static inline bool is_virtual_machine(void)
#endif
}
+struct amdgpu_vm;
+int amdgpu_allocate_static_csa(struct amdgpu_device *adev);
+void amdgpu_deallocate_static_csa(struct amdgpu_device *adev);
+int amdgpu_map_static_csa(struct amdgpu_device *adev, struct amdgpu_vm *vm);
+
#endif
--
2.7.4
