/*
* Copyright 2008 Advanced Micro Devices, Inc.
* Copyright 2008 Red Hat Inc.
* Copyright 2009 Jerome Glisse.
*
* 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.
*
* Authors: Dave Airlie
* Alex Deucher
* Jerome Glisse
*/
#include <drm/drmP.h>
#include <drm/radeon_drm.h>
#include "radeon.h"
#include "radeon_trace.h"
/*
* GPUVM
* GPUVM is similar to the legacy gart on older asics, however
* rather than there being a single global gart table
* for the entire GPU, there are multiple VM page tables active
* at any given time. The VM page tables can contain a mix
* vram pages and system memory pages and system memory pages
* can be mapped as snooped (cached system pages) or unsnooped
* (uncached system pages).
* Each VM has an ID associated with it and there is a page table
* associated with each VMID. When execting a command buffer,
* the kernel tells the the ring what VMID to use for that command
* buffer. VMIDs are allocated dynamically as commands are submitted.
* The userspace drivers maintain their own address space and the kernel
* sets up their pages tables accordingly when they submit their
* command buffers and a VMID is assigned.
* Cayman/Trinity support up to 8 active VMs at any given time;
* SI supports 16.
*/
/**
* radeon_vm_num_pde - return the number of page directory entries
*
* @rdev: radeon_device pointer
*
* Calculate the number of page directory entries (cayman+).
*/
static unsigned radeon_vm_num_pdes(struct radeon_device *rdev)
{
return rdev->vm_manager.max_pfn >> radeon_vm_block_size;
}
/**
* radeon_vm_directory_size - returns the size of the page directory in bytes
*
* @rdev: radeon_device pointer
*
* Calculate the size of the page directory in bytes (cayman+).
*/
static unsigned radeon_vm_directory_size(struct radeon_device *rdev)
{
return RADEON_GPU_PAGE_ALIGN(radeon_vm_num_pdes(rdev) * 8);
}
/**
* radeon_vm_manager_init - init the vm manager
*
* @rdev: radeon_device pointer
*
* Init the vm manager (cayman+).
* Returns 0 for success, error for failure.
*/
int radeon_vm_manager_init(struct radeon_device *rdev)
{
int r;
if (!rdev->vm_manager.enabled) {
r = radeon_asic_vm_init(rdev);
if (r)
return r;
rdev->vm_manager.enabled = true;
}
return 0;
}
/**
* radeon_vm_manager_fini - tear down the vm manager
*
* @rdev: radeon_device pointer
*
* Tear down the VM manager (cayman+).
*/
void radeon_vm_manager_fini(struct radeon_device *rdev)
{
int i;
if (!rdev->vm_manager.enabled)
return;
for (i = 0; i < RADEON_NUM_VM; ++i)
radeon_fence_unref(&rdev->vm_manager.active[i]);
radeon_asic_vm_fini(rdev);
rdev->vm_manager.enabled = false;
}
/**
* radeon_vm_get_bos - add the vm BOs to a validation list
*
* @vm: vm providing the BOs
* @head: head of validation list
*
* Add the page directory to the list of BOs to
* validate for command submission (cayman+).
*/
struct radeon_bo_list *radeon_vm_get_bos(struct radeon_device *rdev,
struct radeon_vm *vm,
struct list_head *head)
{
struct radeon_bo_list *list;
unsigned i, idx;
list = kvmalloc_array(vm->max_pde_used + 2,
sizeof(struct