/* * Copyright 2019 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.
*/
/** * amdgpu_vm_cpu_map_table - make sure new PDs/PTs are kmapped * * @table: newly allocated or validated PD/PT
*/ staticint amdgpu_vm_cpu_map_table(struct amdgpu_bo_vm *table)
{
table->bo.flags |= AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED; return amdgpu_bo_kmap(&table->bo, NULL);
}
/** * amdgpu_vm_cpu_prepare - prepare page table update with the CPU * * @p: see amdgpu_vm_update_params definition * @sync: sync obj with fences to wait on * * Returns: * Negativ errno, 0 for success.
*/ staticint amdgpu_vm_cpu_prepare(struct amdgpu_vm_update_params *p, struct amdgpu_sync *sync)
{ if (!sync) return 0;
return amdgpu_sync_wait(sync, true);
}
/** * amdgpu_vm_cpu_update - helper to update page tables via CPU * * @p: see amdgpu_vm_update_params definition * @vmbo: PD/PT to update * @pe: byte offset of the PDE/PTE, relative to start of PDB/PTB * @addr: dst addr to write into pe * @count: number of page entries to update * @incr: increase next addr by incr bytes * @flags: hw access flags * * Write count number of PT/PD entries directly.
*/ staticint amdgpu_vm_cpu_update(struct amdgpu_vm_update_params *p, struct amdgpu_bo_vm *vmbo, uint64_t pe,
uint64_t addr, unsigned count, uint32_t incr,
uint64_t flags)
{ unsignedint i;
uint64_t value; long r;
r = dma_resv_wait_timeout(vmbo->bo.tbo.base.resv, DMA_RESV_USAGE_KERNEL, true, MAX_SCHEDULE_TIMEOUT); if (r < 0) return r;
for (i = 0; i < count; i++) {
value = p->pages_addr ?
amdgpu_vm_map_gart(p->pages_addr, addr) :
addr;
amdgpu_gmc_set_pte_pde(p->adev, (void *)(uintptr_t)pe,
i, value, flags);
addr += incr;
} return 0;
}
/** * amdgpu_vm_cpu_commit - commit page table update to the HW * * @p: see amdgpu_vm_update_params definition * @fence: unused * * Make sure that the hardware sees the page table updates.
*/ staticint amdgpu_vm_cpu_commit(struct amdgpu_vm_update_params *p, struct dma_fence **fence)
{ if (p->needs_flush)
atomic64_inc(&p->vm->tlb_seq);
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