Commit 4e4bbe73 authored by Monk Liu's avatar Monk Liu Committed by Alex Deucher
Browse files

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: default avatarMonk Liu <Monk.Liu@amd.com>
Reviewed-by: default avatarChristian König <christian.koenig@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent bd7de27d

drivers/gpu/drm/amd/amdgpu/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -24,7 +24,7 @@ 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 \

drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c

0 → 100644
+93 −0
Original line number Diff line number Diff line 
/*

 * 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;

}

drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h

+4 −0
Original line number Diff line number Diff line
@@ -60,4 +60,8 @@ static inline bool is_virtual_machine(void) 
#endif

}



struct amdgpu_vm;

int amdgpu_allocate_static_csa(struct amdgpu_device *adev);

int amdgpu_map_static_csa(struct amdgpu_device *adev, struct amdgpu_vm *vm);



#endif