On Wed, Dec 3, 2025 at 8:14 AM Lijo Lazar <[email protected]> wrote:
>
> Add functions related to cwsr handling inside amdgpu framework.
>
> Signed-off-by: Lijo Lazar <[email protected]>
> ---
> drivers/gpu/drm/amd/amdgpu/Makefile | 2 +-
> drivers/gpu/drm/amd/amdgpu/amdgpu.h | 3 +
> drivers/gpu/drm/amd/amdgpu/amdgpu_cwsr.c | 346 +++++++++++++++++++++++
> drivers/gpu/drm/amd/amdgpu/amdgpu_cwsr.h | 67 +++++
> drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h | 2 +-
> 5 files changed, 418 insertions(+), 2 deletions(-)
> create mode 100644 drivers/gpu/drm/amd/amdgpu/amdgpu_cwsr.c
> create mode 100644 drivers/gpu/drm/amd/amdgpu/amdgpu_cwsr.h
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/Makefile
> b/drivers/gpu/drm/amd/amdgpu/Makefile
> index f65021678fc0..a5feb674508a 100644
> --- a/drivers/gpu/drm/amd/amdgpu/Makefile
> +++ b/drivers/gpu/drm/amd/amdgpu/Makefile
> @@ -67,7 +67,7 @@ amdgpu-y += amdgpu_device.o amdgpu_doorbell_mgr.o
> amdgpu_kms.o \
> amdgpu_fw_attestation.o amdgpu_securedisplay.o \
> amdgpu_eeprom.o amdgpu_mca.o amdgpu_psp_ta.o amdgpu_lsdma.o \
> amdgpu_ring_mux.o amdgpu_xcp.o amdgpu_seq64.o amdgpu_aca.o
> amdgpu_dev_coredump.o \
> - amdgpu_cper.o amdgpu_userq_fence.o amdgpu_eviction_fence.o amdgpu_ip.o
> + amdgpu_cper.o amdgpu_userq_fence.o amdgpu_eviction_fence.o
> amdgpu_ip.o amdgpu_cwsr.o
>
> amdgpu-$(CONFIG_PROC_FS) += amdgpu_fdinfo.o
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
> b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
> index fa71df36f4b3..b9920cab5d31 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
> @@ -331,6 +331,7 @@ struct kfd_vm_fault_info;
> struct amdgpu_hive_info;
> struct amdgpu_reset_context;
> struct amdgpu_reset_control;
> +struct amdgpu_cwsr_isa;
>
> enum amdgpu_cp_irq {
> AMDGPU_CP_IRQ_GFX_ME0_PIPE0_EOP = 0,
> @@ -1325,6 +1326,8 @@ struct amdgpu_device {
> * Must be last --ends in a flexible-array member.
> */
> struct amdgpu_kfd_dev kfd;
> +
> + struct amdgpu_cwsr_info *cwsr_info;
> };
>
> static inline uint32_t amdgpu_ip_version(const struct amdgpu_device *adev,
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cwsr.c
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_cwsr.c
> new file mode 100644
> index 000000000000..c0fc5a383071
> --- /dev/null
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cwsr.c
> @@ -0,0 +1,346 @@
> +/*
> + * Copyright 2025 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 <drm/drm_exec.h>
> +
> +#include "amdgpu.h"
> +#include "cwsr_trap_handler.h"
> +#include "amdgpu_cwsr.h"
> +
> +extern int cwsr_enable;
> +
> +#define AMDGPU_CWSR_TBA_MAX_SIZE (2 * AMDGPU_GPU_PAGE_SIZE)
> +#define AMDGPU_CWSR_TMA_MAX_SIZE (AMDGPU_GPU_PAGE_SIZE)
> +#define AMDGPU_CWSR_TMA_OFFSET (AMDGPU_CWSR_TBA_MAX_SIZE)
> +
> +enum amdgpu_cwsr_region {
> + AMDGPU_CWSR_TBA,
> + AMDGPU_CWSR_TMA,
> +};
> +
> +static inline uint64_t amdgpu_cwsr_tba_vaddr(struct amdgpu_device *adev)
> +{
> + uint64_t addr = AMDGPU_VA_RESERVED_TRAP_START(adev);
> +
> + addr = amdgpu_gmc_sign_extend(addr);
> +
> + return addr;
> +}
> +
> +static inline bool amdgpu_cwsr_is_supported(struct amdgpu_device *adev)
> +{
> + uint32_t gc_ver = amdgpu_ip_version(adev, GC_HWIP, 0);
> +
> + if (!cwsr_enable || gc_ver < IP_VERSION(9, 0, 1))
> + return false;
Probably also want a check for whether userqs are enabled. E.g.,
if (adev->gfx.disable_uq)
return false;
Alex
> +
> + return true;
> +}
> +
> +static void amdgpu_cwsr_init_isa_details(struct amdgpu_device *adev,
> + struct amdgpu_cwsr_info *cwsr_info)
> +{
> + uint32_t gc_ver = amdgpu_ip_version(adev, GC_HWIP, 0);
> +
> + if (gc_ver < IP_VERSION(9, 0, 1)) {
> + BUILD_BUG_ON(sizeof(cwsr_trap_gfx8_hex) >
> + AMDGPU_CWSR_TBA_MAX_SIZE);
> + cwsr_info->isa_buf = cwsr_trap_gfx8_hex;
> + cwsr_info->isa_sz = sizeof(cwsr_trap_gfx8_hex);
> + } else if (gc_ver == IP_VERSION(9, 4, 1)) {
> + BUILD_BUG_ON(sizeof(cwsr_trap_arcturus_hex) >
> + AMDGPU_CWSR_TBA_MAX_SIZE);
> + cwsr_info->isa_buf = cwsr_trap_arcturus_hex;
> + cwsr_info->isa_sz = sizeof(cwsr_trap_arcturus_hex);
> + } else if (gc_ver == IP_VERSION(9, 4, 2)) {
> + BUILD_BUG_ON(sizeof(cwsr_trap_aldebaran_hex) >
> + AMDGPU_CWSR_TBA_MAX_SIZE);
> + cwsr_info->isa_buf = cwsr_trap_aldebaran_hex;
> + cwsr_info->isa_sz = sizeof(cwsr_trap_aldebaran_hex);
> + } else if (gc_ver == IP_VERSION(9, 4, 3) ||
> + gc_ver == IP_VERSION(9, 4, 4)) {
> + BUILD_BUG_ON(sizeof(cwsr_trap_gfx9_4_3_hex) >
> + AMDGPU_CWSR_TBA_MAX_SIZE);
> + cwsr_info->isa_buf = cwsr_trap_gfx9_4_3_hex;
> + cwsr_info->isa_sz = sizeof(cwsr_trap_gfx9_4_3_hex);
> + } else if (gc_ver == IP_VERSION(9, 5, 0)) {
> + BUILD_BUG_ON(sizeof(cwsr_trap_gfx9_5_0_hex) > PAGE_SIZE);
> + cwsr_info->isa_buf = cwsr_trap_gfx9_5_0_hex;
> + cwsr_info->isa_sz = sizeof(cwsr_trap_gfx9_5_0_hex);
> + } else if (gc_ver < IP_VERSION(10, 1, 1)) {
> + BUILD_BUG_ON(sizeof(cwsr_trap_gfx9_hex) >
> + AMDGPU_CWSR_TBA_MAX_SIZE);
> + cwsr_info->isa_buf = cwsr_trap_gfx9_hex;
> + cwsr_info->isa_sz = sizeof(cwsr_trap_gfx9_hex);
> + } else if (gc_ver < IP_VERSION(10, 3, 0)) {
> + BUILD_BUG_ON(sizeof(cwsr_trap_nv1x_hex) >
> + AMDGPU_CWSR_TBA_MAX_SIZE);
> + cwsr_info->isa_buf = cwsr_trap_nv1x_hex;
> + cwsr_info->isa_sz = sizeof(cwsr_trap_nv1x_hex);
> + } else if (gc_ver < IP_VERSION(11, 0, 0)) {
> + BUILD_BUG_ON(sizeof(cwsr_trap_gfx10_hex) >
> + AMDGPU_CWSR_TBA_MAX_SIZE);
> + cwsr_info->isa_buf = cwsr_trap_gfx10_hex;
> + cwsr_info->isa_sz = sizeof(cwsr_trap_gfx10_hex);
> + } else if (gc_ver < IP_VERSION(12, 0, 0)) {
> + /* The gfx11 cwsr trap handler must fit inside a single
> + page. */
> + BUILD_BUG_ON(sizeof(cwsr_trap_gfx11_hex) > PAGE_SIZE);
> + cwsr_info->isa_buf = cwsr_trap_gfx11_hex;
> + cwsr_info->isa_sz = sizeof(cwsr_trap_gfx11_hex);
> + } else {
> + BUILD_BUG_ON(sizeof(cwsr_trap_gfx12_hex) >
> + AMDGPU_CWSR_TBA_MAX_SIZE);
> + cwsr_info->isa_buf = cwsr_trap_gfx12_hex;
> + cwsr_info->isa_sz = sizeof(cwsr_trap_gfx12_hex);
> + }
> +}
> +
> +int amdgpu_cwsr_init(struct amdgpu_device *adev)
> +{
> + struct amdgpu_cwsr_info *cwsr_info __free(kfree) = NULL;
> + void *ptr;
> + int r;
> +
> + if (!amdgpu_cwsr_is_supported(adev))
> + return -EOPNOTSUPP;
> +
> + cwsr_info = kzalloc(sizeof(*cwsr_info), GFP_KERNEL);
> + if (!cwsr_info)
> + return -ENOMEM;
> + amdgpu_cwsr_init_isa_details(adev, cwsr_info);
> +
> + if (!cwsr_info->isa_sz)
> + return -EOPNOTSUPP;
> +
> + r = amdgpu_bo_create_kernel(adev, AMDGPU_CWSR_TBA_MAX_SIZE, PAGE_SIZE,
> + AMDGPU_GEM_DOMAIN_GTT, &cwsr_info->isa_bo,
> + NULL, &ptr);
> + if (r)
> + return r;
> +
> + memcpy(ptr, cwsr_info->isa_buf, cwsr_info->isa_sz);
> + adev->cwsr_info = no_free_ptr(cwsr_info);
> +
> + return 0;
> +}
> +
> +void amdgpu_cwsr_fini(struct amdgpu_device *adev)
> +{
> + if (!amdgpu_cwsr_is_enabled(adev))
> + return;
> +
> + amdgpu_bo_free_kernel(&adev->cwsr_info->isa_bo, NULL, NULL);
> + kfree(adev->cwsr_info);
> + adev->cwsr_info = NULL;
> +}
> +
> +/*
> + * amdgpu_map_cwsr_trap_handler should be called during amdgpu_vm_init
> + * it maps virtual address amdgpu_cwsr_trap_handler_vaddr() to this VM, and
> each
> + * compute queue can use this virtual address for wave save/restore
> + * operations to support compute preemption.
> + */
> +static int amdgpu_cwsr_map_region(struct amdgpu_device *adev,
> + struct amdgpu_vm *vm,
> + struct amdgpu_cwsr_trap_obj *cwsr,
> + enum amdgpu_cwsr_region region)
> +{
> + uint64_t cwsr_addr, va_flags, va;
> + struct amdgpu_bo_va **bo_va;
> + struct amdgpu_bo *bo;
> + uint32_t size;
> + int r;
> +
> + if (!cwsr || !vm)
> + return -EINVAL;
> +
> + cwsr_addr = amdgpu_cwsr_tba_vaddr(adev);
> +
> + if (region == AMDGPU_CWSR_TBA) {
> + size = AMDGPU_CWSR_TBA_MAX_SIZE;
> + bo_va = &cwsr->tba_va;
> + bo = adev->cwsr_info->isa_bo;
> + va = cwsr_addr;
> + va_flags = (AMDGPU_VM_PAGE_READABLE |
> AMDGPU_VM_PAGE_WRITEABLE |
> + AMDGPU_VM_PAGE_EXECUTABLE);
> + } else {
> + size = AMDGPU_CWSR_TMA_MAX_SIZE;
> + bo_va = &cwsr->tma_va;
> + bo = cwsr->tma_bo;
> + va = cwsr_addr + AMDGPU_CWSR_TMA_OFFSET;
> + va_flags = (AMDGPU_VM_PAGE_READABLE |
> AMDGPU_VM_PAGE_WRITEABLE);
> + }
> +
> + *bo_va = amdgpu_vm_bo_add(adev, vm, bo);
> + if (!*bo_va)
> + return -ENOMEM;
> +
> + va &= AMDGPU_GMC_HOLE_MASK;
> + r = amdgpu_vm_bo_map(adev, *bo_va, va, 0, size, va_flags);
> +
> + if (r) {
> + dev_err(adev->dev, "failed to do bo_map on CWSR TBA,
> err=%d\n",
> + r);
> + amdgpu_vm_bo_del(adev, *bo_va);
> + *bo_va = NULL;
> + } else {
> + if (region == AMDGPU_CWSR_TBA)
> + cwsr->tba_gpu_va_addr = va;
> + else
> + cwsr->tma_gpu_va_addr = va;
> + }
> +
> + return r;
> +}
> +
> +static int amdgpu_cwsr_unmap_region(struct amdgpu_device *adev,
> + struct amdgpu_cwsr_trap_obj *cwsr,
> + enum amdgpu_cwsr_region region)
> +{
> + struct amdgpu_bo_va **bo_va;
> + uint64_t va;
> + int r;
> +
> + if (!cwsr)
> + return -EINVAL;
> +
> + if (region == AMDGPU_CWSR_TBA) {
> + bo_va = &cwsr->tba_va;
> + va = cwsr->tba_gpu_va_addr;
> + } else {
> + bo_va = &cwsr->tma_va;
> + va = cwsr->tma_gpu_va_addr;
> + }
> +
> + r = amdgpu_vm_bo_unmap(adev, *bo_va, va);
> + if (r) {
> + dev_err(adev->dev,
> + "failed to do bo_unmap on CWSR trap handler,
> err=%d\n",
> + r);
> + return r;
> + }
> +
> + amdgpu_vm_bo_del(adev, *bo_va);
> + *bo_va = NULL;
> +
> + return r;
> +}
> +
> +/* TBD : Handle APU allocation */
> +int amdgpu_cwsr_alloc(struct amdgpu_device *adev, struct amdgpu_vm *vm,
> + struct amdgpu_cwsr_trap_obj **trap_obj)
> +{
> + struct amdgpu_cwsr_trap_obj *cwsr __free(kfree) = NULL;
> + struct amdgpu_bo *bo;
> + struct drm_exec exec;
> + int r;
> +
> + if (!amdgpu_cwsr_is_enabled(adev))
> + return -EOPNOTSUPP;
> +
> + cwsr = kzalloc(sizeof(*cwsr), GFP_KERNEL);
> + if (!cwsr)
> + return -ENOMEM;
> +
> + bo = adev->cwsr_info->isa_bo;
> + drm_exec_init(&exec, DRM_EXEC_INTERRUPTIBLE_WAIT, 0);
> + drm_exec_until_all_locked(&exec)
> + {
> + r = amdgpu_vm_lock_pd(vm, &exec, 0);
> + if (likely(!r))
> + r = drm_exec_lock_obj(&exec, &bo->tbo.base);
> + drm_exec_retry_on_contention(&exec);
> + if (unlikely(r)) {
> + dev_err(adev->dev,
> + "failed to reserve for CWSR allocs: err=%d\n",
> + r);
> + goto err;
> + }
> + }
> +
> + r = amdgpu_bo_create_kernel(adev, AMDGPU_CWSR_TMA_MAX_SIZE, PAGE_SIZE,
> + AMDGPU_GEM_DOMAIN_GTT, &cwsr->tma_bo,
> NULL,
> + &cwsr->tma_cpu_addr);
> + if (r)
> + goto err;
> +
> + r = amdgpu_cwsr_map_region(adev, vm, cwsr, AMDGPU_CWSR_TMA);
> + if (r)
> + goto err;
> + r = amdgpu_cwsr_map_region(adev, vm, cwsr, AMDGPU_CWSR_TBA);
> + if (r) {
> + amdgpu_cwsr_unmap_region(adev, cwsr, AMDGPU_CWSR_TMA);
> + goto err;
> + }
> +
> + *trap_obj = no_free_ptr(cwsr);
> +
> +err:
> + drm_exec_fini(&exec);
> + if (r)
> + amdgpu_bo_free_kernel(&cwsr->tma_bo, NULL, NULL);
> +
> + return r;
> +}
> +
> +void amdgpu_cwsr_free(struct amdgpu_device *adev, struct amdgpu_vm *vm,
> + struct amdgpu_cwsr_trap_obj **trap_obj)
> +{
> + struct amdgpu_bo *tba_bo;
> + struct amdgpu_bo *tma_bo;
> + struct drm_exec exec;
> + int r;
> +
> + if (!trap_obj || !*trap_obj || !(*trap_obj)->tma_bo)
> + return;
> + tba_bo = adev->cwsr_info->isa_bo;
> + tma_bo = (*trap_obj)->tma_bo;
> +
> + if (!tba_bo || !tma_bo)
> + return;
> +
> + drm_exec_init(&exec, 0, 0);
> + drm_exec_until_all_locked(&exec)
> + {
> + r = amdgpu_vm_lock_pd(vm, &exec, 0);
> + if (likely(!r))
> + r = drm_exec_lock_obj(&exec, &tba_bo->tbo.base);
> + drm_exec_retry_on_contention(&exec);
> + if (likely(!r))
> + r = drm_exec_lock_obj(&exec, &tma_bo->tbo.base);
> + drm_exec_retry_on_contention(&exec);
> + if (unlikely(r)) {
> + dev_err(adev->dev,
> + "failed to reserve CWSR BOs: err=%d\n", r);
> + goto err;
> + }
> + }
> +
> + amdgpu_cwsr_unmap_region(adev, *trap_obj, AMDGPU_CWSR_TBA);
> + amdgpu_cwsr_unmap_region(adev, *trap_obj, AMDGPU_CWSR_TMA);
> +err:
> + drm_exec_fini(&exec);
> + amdgpu_bo_free_kernel(&(*trap_obj)->tma_bo, NULL, NULL);
> + kfree(*trap_obj);
> + *trap_obj = NULL;
> +}
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cwsr.h
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_cwsr.h
> new file mode 100644
> index 000000000000..26ed9308f70b
> --- /dev/null
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cwsr.h
> @@ -0,0 +1,67 @@
> +/*
> + * Copyright 2025 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.
> + */
> +
> +#ifndef AMDGPU_CWSR_H
> +#define AMDGPU_CWSR_H
> +
> +#include <linux/types.h>
> +
> +struct amdgpu_bo;
> +struct amdgpu_bo_va;
> +struct amdgpu_device;
> +struct amdgpu_vm;
> +
> +/**
> + * struct amdgpu_cwsr_obj - CWSR (Compute Wave Save Restore) buffer tracking
> + * @bo: Buffer object for CWSR area
> + * @bo_va: Buffer object virtual address mapping
> + */
> +struct amdgpu_cwsr_trap_obj {
> + uint64_t tma_gpu_va_addr;
> + uint64_t tba_gpu_va_addr;
> +
> + struct amdgpu_bo *tma_bo;
> + struct amdgpu_bo_va *tba_va;
> + struct amdgpu_bo_va *tma_va;
> + void *tma_cpu_addr;
> +};
> +
> +struct amdgpu_cwsr_info {
> + /* cwsr isa */
> + struct amdgpu_bo *isa_bo;
> + const void *isa_buf;
> + uint32_t isa_sz;
> +};
> +
> +int amdgpu_cwsr_init(struct amdgpu_device *adev);
> +void amdgpu_cwsr_fini(struct amdgpu_device *adev);
> +
> +int amdgpu_cwsr_alloc(struct amdgpu_device *adev, struct amdgpu_vm *vm,
> + struct amdgpu_cwsr_trap_obj **cwsr_obj);
> +void amdgpu_cwsr_free(struct amdgpu_device *adev, struct amdgpu_vm *vm,
> + struct amdgpu_cwsr_trap_obj **cwsr_obj);
> +static inline bool amdgpu_cwsr_is_enabled(struct amdgpu_device *adev)
> +{
> + return adev->cwsr_info != NULL;
> +}
> +
> +#endif
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
> index 139642eacdd0..783ca2b8dfef 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
> @@ -173,7 +173,7 @@ struct amdgpu_bo_vm;
> #define AMDGPU_VA_RESERVED_SEQ64_SIZE (2ULL << 20)
> #define AMDGPU_VA_RESERVED_SEQ64_START(adev)
> (AMDGPU_VA_RESERVED_CSA_START(adev) \
> -
> AMDGPU_VA_RESERVED_SEQ64_SIZE)
> -#define AMDGPU_VA_RESERVED_TRAP_SIZE (2ULL << 12)
> +#define AMDGPU_VA_RESERVED_TRAP_SIZE (3ULL << 12)
> #define AMDGPU_VA_RESERVED_TRAP_START(adev)
> (AMDGPU_VA_RESERVED_SEQ64_START(adev) \
> -
> AMDGPU_VA_RESERVED_TRAP_SIZE)
> #define AMDGPU_VA_RESERVED_BOTTOM (1ULL << 16)
> --
> 2.49.0
>
