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/*
* 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.
*/
#include "amdgpu_vm.h"
#include "amdgpu_object.h"
#include "amdgpu_trace.h"
/**
* amdgpu_vm_cpu_map_table - make sure new PDs/PTs are kmapped
*
* @table: newly allocated or validated PD/PT
*/
static int 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
* @resv: reservation object with embedded fence
* @sync_mode: synchronization mode
*
* Returns:
* Negativ errno, 0 for success.
*/
static int amdgpu_vm_cpu_prepare(struct amdgpu_vm_update_params *p,
struct dma_resv *resv,
enum amdgpu_sync_mode sync_mode)
{
if (!resv)
return 0;
return amdgpu_bo_sync_wait_resv(p->adev, resv, sync_mode, p->vm, 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.
*/
static int 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)
{
unsigned int 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;
pe += (unsigned long)amdgpu_bo_kptr(&vmbo->bo);
trace_amdgpu_vm_set_ptes(pe, addr, count, incr, flags, p->immediate);
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.
*/
static int amdgpu_vm_cpu_commit(struct amdgpu_vm_update_params *p,
struct dma_fence **fence)
{
if (p->needs_flush)
atomic64_inc(&p->vm->tlb_seq);
mb();
amdgpu_device_flush_hdp(p->adev, NULL);
return 0;
}
const struct amdgpu_vm_update_funcs amdgpu_vm_cpu_funcs = {
.map_table = amdgpu_vm_cpu_map_table,
.prepare = amdgpu_vm_cpu_prepare,
.update = amdgpu_vm_cpu_update,
.commit = amdgpu_vm_cpu_commit
};
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