// SPDX-License-Identifier: MIT /* * Copyright 2023 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" #include"amdgpu_seq64.h"
#include <drm/drm_exec.h>
/** * DOC: amdgpu_seq64 * * amdgpu_seq64 allocates a 64bit memory on each request in sequence order. * seq64 driver is required for user queue fence memory allocation, TLB * counters and VM updates. It has maximum count of 32768 64 bit slots.
*/
/** * amdgpu_seq64_get_va_base - Get the seq64 va base address * * @adev: amdgpu_device pointer * * Returns: * va base address on success
*/ staticinline u64 amdgpu_seq64_get_va_base(struct amdgpu_device *adev)
{
u64 addr = AMDGPU_VA_RESERVED_SEQ64_START(adev);
addr = amdgpu_gmc_sign_extend(addr);
return addr;
}
/** * amdgpu_seq64_map - Map the seq64 memory to VM * * @adev: amdgpu_device pointer * @vm: vm pointer * @bo_va: bo_va pointer * * Map the seq64 memory to the given VM. * * Returns: * 0 on success or a negative error code on failure
*/ int amdgpu_seq64_map(struct amdgpu_device *adev, struct amdgpu_vm *vm, struct amdgpu_bo_va **bo_va)
{
u64 seq64_addr, va_flags; struct amdgpu_bo *bo; struct drm_exec exec; int r;
bo = adev->seq64.sbo; if (!bo) return -EINVAL;
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)) goto error;
}
*bo_va = amdgpu_vm_bo_add(adev, vm, bo); if (!*bo_va) {
r = -ENOMEM; goto error;
}
va_flags = amdgpu_gem_va_map_flags(adev, AMDGPU_VM_PAGE_READABLE | AMDGPU_VM_MTYPE_UC);
r = amdgpu_vm_bo_map(adev, *bo_va, seq64_addr, 0, AMDGPU_VA_RESERVED_SEQ64_SIZE,
va_flags); if (r) {
DRM_ERROR("failed to do bo_map on userq sem, err=%d\n", r);
amdgpu_vm_bo_del(adev, *bo_va); goto error;
}
r = amdgpu_vm_bo_update(adev, *bo_va, false); if (r) {
DRM_ERROR("failed to do vm_bo_update on userq sem\n");
amdgpu_vm_bo_del(adev, *bo_va); goto error;
}
error:
drm_exec_fini(&exec); return r;
}
/** * amdgpu_seq64_unmap - Unmap the seq64 memory * * @adev: amdgpu_device pointer * @fpriv: DRM file private * * Unmap the seq64 memory from the given VM.
*/ void amdgpu_seq64_unmap(struct amdgpu_device *adev, struct amdgpu_fpriv *fpriv)
{ struct amdgpu_vm *vm; struct amdgpu_bo *bo; struct drm_exec exec; int r;
if (!fpriv->seq64_va) return;
bo = adev->seq64.sbo; if (!bo) return;
vm = &fpriv->vm;
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, &bo->tbo.base);
drm_exec_retry_on_contention(&exec); if (unlikely(r)) goto error;
}
amdgpu_vm_bo_del(adev, fpriv->seq64_va);
fpriv->seq64_va = NULL;
error:
drm_exec_fini(&exec);
}
/** * amdgpu_seq64_alloc - Allocate a 64 bit memory * * @adev: amdgpu_device pointer * @va: VA to access the seq in process address space * @gpu_addr: GPU address to access the seq * @cpu_addr: CPU address to access the seq * * Alloc a 64 bit memory from seq64 pool. * * Returns: * 0 on success or a negative error code on failure
*/ int amdgpu_seq64_alloc(struct amdgpu_device *adev, u64 *va,
u64 *gpu_addr, u64 **cpu_addr)
{ unsignedlong bit_pos;
bit_pos = find_first_zero_bit(adev->seq64.used, adev->seq64.num_sem); if (bit_pos >= adev->seq64.num_sem) return -ENOSPC;
if (gpu_addr)
*gpu_addr = bit_pos * sizeof(u64) + adev->seq64.gpu_addr;
*cpu_addr = bit_pos + adev->seq64.cpu_base_addr;
return 0;
}
/** * amdgpu_seq64_free - Free the given 64 bit memory * * @adev: amdgpu_device pointer * @va: gpu start address to be freed * * Free the given 64 bit memory from seq64 pool.
*/ void amdgpu_seq64_free(struct amdgpu_device *adev, u64 va)
{ unsignedlong bit_pos;
/** * amdgpu_seq64_init - Initialize seq64 driver * * @adev: amdgpu_device pointer * * Allocate the required memory space for seq64. * * Returns: * 0 on success or a negative error code on failure
*/ int amdgpu_seq64_init(struct amdgpu_device *adev)
{ int r;
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