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drm/radeon: separate gart and vm functions 

Both are complex enough on their own.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Christian König 2014-02-20 10:25:15 +01:00
parent b03b4e4b6e
commit 2280ab57b6
3 changed files with 982 additions and 959 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/gpu/drm/radeon/Makefile
View File

@ -80,7 +80,7 @@ radeon-y += radeon_device.o radeon_asic.o radeon_kms.o \
r600_dpm.o rs780_dpm.o rv6xx_dpm.o rv770_dpm.o rv730_dpm.o rv740_dpm.o \
rv770_smc.o cypress_dpm.o btc_dpm.o sumo_dpm.o sumo_smc.o trinity_dpm.o \
trinity_smc.o ni_dpm.o si_smc.o si_dpm.o kv_smc.o kv_dpm.o ci_smc.o \
ci_dpm.o dce6_afmt.o
ci_dpm.o dce6_afmt.o radeon_vm.o
# add async DMA block
radeon-y += \

958
drivers/gpu/drm/radeon/radeon_gart.c
View File

@ -28,8 +28,6 @@
#include <drm/drmP.h>
#include <drm/radeon_drm.h>
#include "radeon.h"
#include "radeon_reg.h"
#include "radeon_trace.h"
/*
* GART
@ -394,959 +392,3 @@ void radeon_gart_fini(struct radeon_device *rdev)
radeon_dummy_page_fini(rdev);
}
/*
* 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.
*/
/*
* vm helpers
*
* TODO bind a default page at vm initialization for default address
*/
/**
* 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)
{
struct radeon_vm *vm;
struct radeon_bo_va *bo_va;
int r;
unsigned size;
if (!rdev->vm_manager.enabled) {
/* allocate enough for 2 full VM pts */
size = radeon_vm_directory_size(rdev);
size += rdev->vm_manager.max_pfn * 8;
size *= 2;
r = radeon_sa_bo_manager_init(rdev, &rdev->vm_manager.sa_manager,
RADEON_GPU_PAGE_ALIGN(size),
RADEON_VM_PTB_ALIGN_SIZE,
RADEON_GEM_DOMAIN_VRAM);
if (r) {
dev_err(rdev->dev, "failed to allocate vm bo (%dKB)\n",
(rdev->vm_manager.max_pfn * 8) >> 10);
return r;
}
r = radeon_asic_vm_init(rdev);
if (r)
return r;
rdev->vm_manager.enabled = true;
r = radeon_sa_bo_manager_start(rdev, &rdev->vm_manager.sa_manager);
if (r)
return r;
}
/* restore page table */
list_for_each_entry(vm, &rdev->vm_manager.lru_vm, list) {
if (vm->page_directory == NULL)
continue;
list_for_each_entry(bo_va, &vm->va, vm_list) {
bo_va->valid = false;
}
}
return 0;
}
/**
* radeon_vm_free_pt - free the page table for a specific vm
*
* @rdev: radeon_device pointer
* @vm: vm to unbind
*
* Free the page table of a specific vm (cayman+).
*
* Global and local mutex must be lock!
*/
static void radeon_vm_free_pt(struct radeon_device *rdev,
struct radeon_vm *vm)
{
struct radeon_bo_va *bo_va;
int i;
if (!vm->page_directory)
return;
list_del_init(&vm->list);
radeon_sa_bo_free(rdev, &vm->page_directory, vm->fence);
list_for_each_entry(bo_va, &vm->va, vm_list) {
bo_va->valid = false;
}
if (vm->page_tables == NULL)
return;
for (i = 0; i < radeon_vm_num_pdes(rdev); i++)
radeon_sa_bo_free(rdev, &vm->page_tables[i], vm->fence);
kfree(vm->page_tables);
}
/**
* 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)
{
struct radeon_vm *vm, *tmp;
int i;
if (!rdev->vm_manager.enabled)
return;
mutex_lock(&rdev->vm_manager.lock);
/* free all allocated page tables */
list_for_each_entry_safe(vm, tmp, &rdev->vm_manager.lru_vm, list) {
mutex_lock(&vm->mutex);
radeon_vm_free_pt(rdev, vm);
mutex_unlock(&vm->mutex);
}
for (i = 0; i < RADEON_NUM_VM; ++i) {
radeon_fence_unref(&rdev->vm_manager.active[i]);
}
radeon_asic_vm_fini(rdev);
mutex_unlock(&rdev->vm_manager.lock);
radeon_sa_bo_manager_suspend(rdev, &rdev->vm_manager.sa_manager);
radeon_sa_bo_manager_fini(rdev, &rdev->vm_manager.sa_manager);
rdev->vm_manager.enabled = false;
}
/**
* radeon_vm_evict - evict page table to make room for new one
*
* @rdev: radeon_device pointer
* @vm: VM we want to allocate something for
*
* Evict a VM from the lru, making sure that it isn't @vm. (cayman+).
* Returns 0 for success, -ENOMEM for failure.
*
* Global and local mutex must be locked!
*/
static int radeon_vm_evict(struct radeon_device *rdev, struct radeon_vm *vm)
{
struct radeon_vm *vm_evict;
if (list_empty(&rdev->vm_manager.lru_vm))
return -ENOMEM;
vm_evict = list_first_entry(&rdev->vm_manager.lru_vm,
struct radeon_vm, list);
if (vm_evict == vm)
return -ENOMEM;
mutex_lock(&vm_evict->mutex);
radeon_vm_free_pt(rdev, vm_evict);
mutex_unlock(&vm_evict->mutex);
return 0;
}
/**
* radeon_vm_alloc_pt - allocates a page table for a VM
*
* @rdev: radeon_device pointer
* @vm: vm to bind
*
* Allocate a page table for the requested vm (cayman+).
* Returns 0 for success, error for failure.
*
* Global and local mutex must be locked!
*/
int radeon_vm_alloc_pt(struct radeon_device *rdev, struct radeon_vm *vm)
{
unsigned pd_size, pd_entries, pts_size;
struct radeon_ib ib;
int r;
if (vm == NULL) {
return -EINVAL;
}
if (vm->page_directory != NULL) {
return 0;
}
pd_size = radeon_vm_directory_size(rdev);
pd_entries = radeon_vm_num_pdes(rdev);
retry:
r = radeon_sa_bo_new(rdev, &rdev->vm_manager.sa_manager,
&vm->page_directory, pd_size,
RADEON_VM_PTB_ALIGN_SIZE, false);
if (r == -ENOMEM) {
r = radeon_vm_evict(rdev, vm);
if (r)
return r;
goto retry;
} else if (r) {
return r;
}
vm->pd_gpu_addr = radeon_sa_bo_gpu_addr(vm->page_directory);
/* Initially clear the page directory */
r = radeon_ib_get(rdev, R600_RING_TYPE_DMA_INDEX, &ib,
NULL, pd_entries * 2 + 64);
if (r) {
radeon_sa_bo_free(rdev, &vm->page_directory, vm->fence);
return r;
}
ib.length_dw = 0;
radeon_asic_vm_set_page(rdev, &ib, vm->pd_gpu_addr,
0, pd_entries, 0, 0);
radeon_semaphore_sync_to(ib.semaphore, vm->fence);
r = radeon_ib_schedule(rdev, &ib, NULL);
if (r) {
radeon_ib_free(rdev, &ib);
radeon_sa_bo_free(rdev, &vm->page_directory, vm->fence);
return r;
}
radeon_fence_unref(&vm->fence);
vm->fence = radeon_fence_ref(ib.fence);
radeon_ib_free(rdev, &ib);
radeon_fence_unref(&vm->last_flush);
/* allocate page table array */
pts_size = radeon_vm_num_pdes(rdev) * sizeof(struct radeon_sa_bo *);
vm->page_tables = kzalloc(pts_size, GFP_KERNEL);
if (vm->page_tables == NULL) {
DRM_ERROR("Cannot allocate memory for page table array\n");
radeon_sa_bo_free(rdev, &vm->page_directory, vm->fence);
return -ENOMEM;
}
return 0;
}
/**
* radeon_vm_add_to_lru - add VMs page table to LRU list
*
* @rdev: radeon_device pointer
* @vm: vm to add to LRU
*
* Add the allocated page table to the LRU list (cayman+).
*
* Global mutex must be locked!
*/
void radeon_vm_add_to_lru(struct radeon_device *rdev, struct radeon_vm *vm)
{
list_del_init(&vm->list);
list_add_tail(&vm->list, &rdev->vm_manager.lru_vm);
}
/**
* radeon_vm_grab_id - allocate the next free VMID
*
* @rdev: radeon_device pointer
* @vm: vm to allocate id for
* @ring: ring we want to submit job to
*
* Allocate an id for the vm (cayman+).
* Returns the fence we need to sync to (if any).
*
* Global and local mutex must be locked!
*/
struct radeon_fence *radeon_vm_grab_id(struct radeon_device *rdev,
struct radeon_vm *vm, int ring)
{
struct radeon_fence *best[RADEON_NUM_RINGS] = {};
unsigned choices[2] = {};
unsigned i;
/* check if the id is still valid */
if (vm->last_id_use && vm->last_id_use == rdev->vm_manager.active[vm->id])
return NULL;
/* we definately need to flush */
radeon_fence_unref(&vm->last_flush);
/* skip over VMID 0, since it is the system VM */
for (i = 1; i < rdev->vm_manager.nvm; ++i) {
struct radeon_fence *fence = rdev->vm_manager.active[i];
if (fence == NULL) {
/* found a free one */
vm->id = i;
trace_radeon_vm_grab_id(vm->id, ring);
return NULL;
}
if (radeon_fence_is_earlier(fence, best[fence->ring])) {
best[fence->ring] = fence;
choices[fence->ring == ring ? 0 : 1] = i;
}
}
for (i = 0; i < 2; ++i) {
if (choices[i]) {
vm->id = choices[i];
trace_radeon_vm_grab_id(vm->id, ring);
return rdev->vm_manager.active[choices[i]];
}
}
/* should never happen */
BUG();
return NULL;
}
/**
* radeon_vm_fence - remember fence for vm
*
* @rdev: radeon_device pointer
* @vm: vm we want to fence
* @fence: fence to remember
*
* Fence the vm (cayman+).
* Set the fence used to protect page table and id.
*
* Global and local mutex must be locked!
*/
void radeon_vm_fence(struct radeon_device *rdev,
struct radeon_vm *vm,
struct radeon_fence *fence)
{
radeon_fence_unref(&rdev->vm_manager.active[vm->id]);
rdev->vm_manager.active[vm->id] = radeon_fence_ref(fence);
radeon_fence_unref(&vm->fence);
vm->fence = radeon_fence_ref(fence);
radeon_fence_unref(&vm->last_id_use);
vm->last_id_use = radeon_fence_ref(fence);
}
/**
* radeon_vm_bo_find - find the bo_va for a specific vm & bo
*
* @vm: requested vm
* @bo: requested buffer object
*
* Find @bo inside the requested vm (cayman+).
* Search inside the @bos vm list for the requested vm
* Returns the found bo_va or NULL if none is found
*
* Object has to be reserved!
*/
struct radeon_bo_va *radeon_vm_bo_find(struct radeon_vm *vm,
struct radeon_bo *bo)
{
struct radeon_bo_va *bo_va;
list_for_each_entry(bo_va, &bo->va, bo_list) {
if (bo_va->vm == vm) {
return bo_va;
}
}
return NULL;
}
/**
* radeon_vm_bo_add - add a bo to a specific vm
*
* @rdev: radeon_device pointer
* @vm: requested vm
* @bo: radeon buffer object
*
* Add @bo into the requested vm (cayman+).
* Add @bo to the list of bos associated with the vm
* Returns newly added bo_va or NULL for failure
*
* Object has to be reserved!
*/
struct radeon_bo_va *radeon_vm_bo_add(struct radeon_device *rdev,
struct radeon_vm *vm,
struct radeon_bo *bo)
{
struct radeon_bo_va *bo_va;
bo_va = kzalloc(sizeof(struct radeon_bo_va), GFP_KERNEL);
if (bo_va == NULL) {
return NULL;
}
bo_va->vm = vm;
bo_va->bo = bo;
bo_va->soffset = 0;
bo_va->eoffset = 0;
bo_va->flags = 0;
bo_va->valid = false;
bo_va->ref_count = 1;
INIT_LIST_HEAD(&bo_va->bo_list);
INIT_LIST_HEAD(&bo_va->vm_list);
mutex_lock(&vm->mutex);
list_add(&bo_va->vm_list, &vm->va);
list_add_tail(&bo_va->bo_list, &bo->va);
mutex_unlock(&vm->mutex);
return bo_va;
}
/**
* radeon_vm_bo_set_addr - set bos virtual address inside a vm
*
* @rdev: radeon_device pointer
* @bo_va: bo_va to store the address
* @soffset: requested offset of the buffer in the VM address space
* @flags: attributes of pages (read/write/valid/etc.)
*
* Set offset of @bo_va (cayman+).
* Validate and set the offset requested within the vm address space.
* Returns 0 for success, error for failure.
*
* Object has to be reserved!
*/
int radeon_vm_bo_set_addr(struct radeon_device *rdev,
struct radeon_bo_va *bo_va,
uint64_t soffset,
uint32_t flags)
{
uint64_t size = radeon_bo_size(bo_va->bo);
uint64_t eoffset, last_offset = 0;
struct radeon_vm *vm = bo_va->vm;
struct radeon_bo_va *tmp;
struct list_head *head;
unsigned last_pfn;
if (soffset) {
/* make sure object fit at this offset */
eoffset = soffset + size;
if (soffset >= eoffset) {
return -EINVAL;
}
last_pfn = eoffset / RADEON_GPU_PAGE_SIZE;
if (last_pfn > rdev->vm_manager.max_pfn) {
dev_err(rdev->dev, "va above limit (0x%08X > 0x%08X)\n",
last_pfn, rdev->vm_manager.max_pfn);
return -EINVAL;
}
} else {
eoffset = last_pfn = 0;
}
mutex_lock(&vm->mutex);
head = &vm->va;
last_offset = 0;
list_for_each_entry(tmp, &vm->va, vm_list) {
if (bo_va == tmp) {
/* skip over currently modified bo */
continue;
}
if (soffset >= last_offset && eoffset <= tmp->soffset) {
/* bo can be added before this one */
break;
}
if (eoffset > tmp->soffset && soffset < tmp->eoffset) {
/* bo and tmp overlap, invalid offset */
dev_err(rdev->dev, "bo %p va 0x%08X conflict with (bo %p 0x%08X 0x%08X)\n",
bo_va->bo, (unsigned)bo_va->soffset, tmp->bo,
(unsigned)tmp->soffset, (unsigned)tmp->eoffset);
mutex_unlock(&vm->mutex);
return -EINVAL;
}
last_offset = tmp->eoffset;
head = &tmp->vm_list;
}
bo_va->soffset = soffset;
bo_va->eoffset = eoffset;
bo_va->flags = flags;
bo_va->valid = false;
list_move(&bo_va->vm_list, head);
mutex_unlock(&vm->mutex);
return 0;
}
/**
* radeon_vm_map_gart - get the physical address of a gart page
*
* @rdev: radeon_device pointer
* @addr: the unmapped addr
*
* Look up the physical address of the page that the pte resolves
* to (cayman+).
* Returns the physical address of the page.
*/
uint64_t radeon_vm_map_gart(struct radeon_device *rdev, uint64_t addr)
{
uint64_t result;
/* page table offset */
result = rdev->gart.pages_addr[addr >> PAGE_SHIFT];
/* in case cpu page size != gpu page size*/
result |= addr & (~PAGE_MASK);
return result;
}
/**
* radeon_vm_page_flags - translate page flags to what the hw uses
*
* @flags: flags comming from userspace
*
* Translate the flags the userspace ABI uses to hw flags.
*/
static uint32_t radeon_vm_page_flags(uint32_t flags)
{
uint32_t hw_flags = 0;
hw_flags |= (flags & RADEON_VM_PAGE_VALID) ? R600_PTE_VALID : 0;
hw_flags |= (flags & RADEON_VM_PAGE_READABLE) ? R600_PTE_READABLE : 0;
hw_flags |= (flags & RADEON_VM_PAGE_WRITEABLE) ? R600_PTE_WRITEABLE : 0;
if (flags & RADEON_VM_PAGE_SYSTEM) {
hw_flags |= R600_PTE_SYSTEM;
hw_flags |= (flags & RADEON_VM_PAGE_SNOOPED) ? R600_PTE_SNOOPED : 0;
}
return hw_flags;
}
/**
* radeon_vm_update_pdes - make sure that page directory is valid
*
* @rdev: radeon_device pointer
* @vm: requested vm
* @start: start of GPU address range
* @end: end of GPU address range
*
* Allocates new page tables if necessary
* and updates the page directory (cayman+).
* Returns 0 for success, error for failure.
*
* Global and local mutex must be locked!
*/
static int radeon_vm_update_pdes(struct radeon_device *rdev,
struct radeon_vm *vm,
struct radeon_ib *ib,
uint64_t start, uint64_t end)
{
static const uint32_t incr = RADEON_VM_PTE_COUNT * 8;
uint64_t last_pde = ~0, last_pt = ~0;
unsigned count = 0;
uint64_t pt_idx;
int r;
start = (start / RADEON_GPU_PAGE_SIZE) >> RADEON_VM_BLOCK_SIZE;
end = (end / RADEON_GPU_PAGE_SIZE) >> RADEON_VM_BLOCK_SIZE;
/* walk over the address space and update the page directory */
for (pt_idx = start; pt_idx <= end; ++pt_idx) {
uint64_t pde, pt;
if (vm->page_tables[pt_idx])
continue;
retry:
r = radeon_sa_bo_new(rdev, &rdev->vm_manager.sa_manager,
&vm->page_tables[pt_idx],
RADEON_VM_PTE_COUNT * 8,
RADEON_GPU_PAGE_SIZE, false);
if (r == -ENOMEM) {
r = radeon_vm_evict(rdev, vm);
if (r)
return r;
goto retry;
} else if (r) {
return r;
}
pde = vm->pd_gpu_addr + pt_idx * 8;
pt = radeon_sa_bo_gpu_addr(vm->page_tables[pt_idx]);
if (((last_pde + 8 * count) != pde) ||
((last_pt + incr * count) != pt)) {
if (count) {
radeon_asic_vm_set_page(rdev, ib, last_pde,
last_pt, count, incr,
R600_PTE_VALID);
count *= RADEON_VM_PTE_COUNT;
radeon_asic_vm_set_page(rdev, ib, last_pt, 0,
count, 0, 0);
}
count = 1;
last_pde = pde;
last_pt = pt;
} else {
++count;
}
}
if (count) {
radeon_asic_vm_set_page(rdev, ib, last_pde, last_pt, count,
incr, R600_PTE_VALID);
count *= RADEON_VM_PTE_COUNT;
radeon_asic_vm_set_page(rdev, ib, last_pt, 0,
count, 0, 0);
}
return 0;
}
/**
* radeon_vm_update_ptes - make sure that page tables are valid
*
* @rdev: radeon_device pointer
* @vm: requested vm
* @start: start of GPU address range
* @end: end of GPU address range
* @dst: destination address to map to
* @flags: mapping flags
*
* Update the page tables in the range @start - @end (cayman+).
*
* Global and local mutex must be locked!
*/
static void radeon_vm_update_ptes(struct radeon_device *rdev,
struct radeon_vm *vm,
struct radeon_ib *ib,
uint64_t start, uint64_t end,
uint64_t dst, uint32_t flags)
{
static const uint64_t mask = RADEON_VM_PTE_COUNT - 1;
uint64_t last_pte = ~0, last_dst = ~0;
unsigned count = 0;
uint64_t addr;
start = start / RADEON_GPU_PAGE_SIZE;
end = end / RADEON_GPU_PAGE_SIZE;
/* walk over the address space and update the page tables */
for (addr = start; addr < end; ) {
uint64_t pt_idx = addr >> RADEON_VM_BLOCK_SIZE;
unsigned nptes;
uint64_t pte;
if ((addr & ~mask) == (end & ~mask))
nptes = end - addr;
else
nptes = RADEON_VM_PTE_COUNT - (addr & mask);
pte = radeon_sa_bo_gpu_addr(vm->page_tables[pt_idx]);
pte += (addr & mask) * 8;
if ((last_pte + 8 * count) != pte) {
if (count) {
radeon_asic_vm_set_page(rdev, ib, last_pte,
last_dst, count,
RADEON_GPU_PAGE_SIZE,
flags);
}
count = nptes;
last_pte = pte;
last_dst = dst;
} else {
count += nptes;
}
addr += nptes;
dst += nptes * RADEON_GPU_PAGE_SIZE;
}
if (count) {
radeon_asic_vm_set_page(rdev, ib, last_pte,
last_dst, count,
RADEON_GPU_PAGE_SIZE, flags);
}
}
/**
* radeon_vm_bo_update - map a bo into the vm page table
*
* @rdev: radeon_device pointer
* @vm: requested vm
* @bo: radeon buffer object
* @mem: ttm mem
*
* Fill in the page table entries for @bo (cayman+).
* Returns 0 for success, -EINVAL for failure.
*
* Object have to be reserved & global and local mutex must be locked!
*/
int radeon_vm_bo_update(struct radeon_device *rdev,
struct radeon_vm *vm,
struct radeon_bo *bo,
struct ttm_mem_reg *mem)
{
struct radeon_ib ib;
struct radeon_bo_va *bo_va;
unsigned nptes, npdes, ndw;
uint64_t addr;
int r;
/* nothing to do if vm isn't bound */
if (vm->page_directory == NULL)
return 0;
bo_va = radeon_vm_bo_find(vm, bo);
if (bo_va == NULL) {
dev_err(rdev->dev, "bo %p not in vm %p\n", bo, vm);
return -EINVAL;
}
if (!bo_va->soffset) {
dev_err(rdev->dev, "bo %p don't has a mapping in vm %p\n",
bo, vm);
return -EINVAL;
}
if ((bo_va->valid && mem) || (!bo_va->valid && mem == NULL))
return 0;
bo_va->flags &= ~RADEON_VM_PAGE_VALID;
bo_va->flags &= ~RADEON_VM_PAGE_SYSTEM;
if (mem) {
addr = mem->start << PAGE_SHIFT;
if (mem->mem_type != TTM_PL_SYSTEM) {
bo_va->flags |= RADEON_VM_PAGE_VALID;
bo_va->valid = true;
}
if (mem->mem_type == TTM_PL_TT) {
bo_va->flags |= RADEON_VM_PAGE_SYSTEM;
} else {
addr += rdev->vm_manager.vram_base_offset;
}
} else {
addr = 0;
bo_va->valid = false;
}
trace_radeon_vm_bo_update(bo_va);
nptes = radeon_bo_ngpu_pages(bo);
/* assume two extra pdes in case the mapping overlaps the borders */
npdes = (nptes >> RADEON_VM_BLOCK_SIZE) + 2;
/* padding, etc. */
ndw = 64;
if (RADEON_VM_BLOCK_SIZE > 11)
/* reserve space for one header for every 2k dwords */
ndw += (nptes >> 11) * 4;
else
/* reserve space for one header for
every (1 << BLOCK_SIZE) entries */
ndw += (nptes >> RADEON_VM_BLOCK_SIZE) * 4;
/* reserve space for pte addresses */
ndw += nptes * 2;
/* reserve space for one header for every 2k dwords */
ndw += (npdes >> 11) * 4;
/* reserve space for pde addresses */
ndw += npdes * 2;
/* reserve space for clearing new page tables */
ndw += npdes * 2 * RADEON_VM_PTE_COUNT;
/* update too big for an IB */
if (ndw > 0xfffff)
return -ENOMEM;
r = radeon_ib_get(rdev, R600_RING_TYPE_DMA_INDEX, &ib, NULL, ndw * 4);
if (r)
return r;
ib.length_dw = 0;
r = radeon_vm_update_pdes(rdev, vm, &ib, bo_va->soffset, bo_va->eoffset);
if (r) {
radeon_ib_free(rdev, &ib);
return r;
}
radeon_vm_update_ptes(rdev, vm, &ib, bo_va->soffset, bo_va->eoffset,
addr, radeon_vm_page_flags(bo_va->flags));
radeon_semaphore_sync_to(ib.semaphore, vm->fence);
r = radeon_ib_schedule(rdev, &ib, NULL);
if (r) {
radeon_ib_free(rdev, &ib);
return r;
}
radeon_fence_unref(&vm->fence);
vm->fence = radeon_fence_ref(ib.fence);
radeon_ib_free(rdev, &ib);
radeon_fence_unref(&vm->last_flush);
return 0;
}
/**
* radeon_vm_bo_rmv - remove a bo to a specific vm
*
* @rdev: radeon_device pointer
* @bo_va: requested bo_va
*
* Remove @bo_va->bo from the requested vm (cayman+).
* Remove @bo_va->bo from the list of bos associated with the bo_va->vm and
* remove the ptes for @bo_va in the page table.
* Returns 0 for success.
*
* Object have to be reserved!
*/
int radeon_vm_bo_rmv(struct radeon_device *rdev,
struct radeon_bo_va *bo_va)
{
int r = 0;
mutex_lock(&rdev->vm_manager.lock);
mutex_lock(&bo_va->vm->mutex);
if (bo_va->soffset) {
r = radeon_vm_bo_update(rdev, bo_va->vm, bo_va->bo, NULL);
}
mutex_unlock(&rdev->vm_manager.lock);
list_del(&bo_va->vm_list);
mutex_unlock(&bo_va->vm->mutex);
list_del(&bo_va->bo_list);
kfree(bo_va);
return r;
}
/**
* radeon_vm_bo_invalidate - mark the bo as invalid
*
* @rdev: radeon_device pointer
* @vm: requested vm
* @bo: radeon buffer object
*
* Mark @bo as invalid (cayman+).
*/
void radeon_vm_bo_invalidate(struct radeon_device *rdev,
struct radeon_bo *bo)
{
struct radeon_bo_va *bo_va;
list_for_each_entry(bo_va, &bo->va, bo_list) {
bo_va->valid = false;
}
}
/**
* radeon_vm_init - initialize a vm instance
*
* @rdev: radeon_device pointer
* @vm: requested vm
*
* Init @vm fields (cayman+).
*/
void radeon_vm_init(struct radeon_device *rdev, struct radeon_vm *vm)
{
vm->id = 0;
vm->fence = NULL;
vm->last_flush = NULL;
vm->last_id_use = NULL;
mutex_init(&vm->mutex);
INIT_LIST_HEAD(&vm->list);
INIT_LIST_HEAD(&vm->va);
}
/**
* radeon_vm_fini - tear down a vm instance
*
* @rdev: radeon_device pointer
* @vm: requested vm
*
* Tear down @vm (cayman+).
* Unbind the VM and remove all bos from the vm bo list
*/
void radeon_vm_fini(struct radeon_device *rdev, struct radeon_vm *vm)
{
struct radeon_bo_va *bo_va, *tmp;
int r;
mutex_lock(&rdev->vm_manager.lock);
mutex_lock(&vm->mutex);
radeon_vm_free_pt(rdev, vm);
mutex_unlock(&rdev->vm_manager.lock);
if (!list_empty(&vm->va)) {
dev_err(rdev->dev, "still active bo inside vm\n");
}
list_for_each_entry_safe(bo_va, tmp, &vm->va, vm_list) {
list_del_init(&bo_va->vm_list);
r = radeon_bo_reserve(bo_va->bo, false);
if (!r) {
list_del_init(&bo_va->bo_list);
radeon_bo_unreserve(bo_va->bo);
kfree(bo_va);
}
}
radeon_fence_unref(&vm->fence);
radeon_fence_unref(&vm->last_flush);
radeon_fence_unref(&vm->last_id_use);
mutex_unlock(&vm->mutex);
}

981
drivers/gpu/drm/radeon/radeon_vm.c Normal file
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@ -0,0 +1,981 @@
/*
* 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)
{
struct radeon_vm *vm;
struct radeon_bo_va *bo_va;
int r;
unsigned size;
if (!rdev->vm_manager.enabled) {
/* allocate enough for 2 full VM pts */
size = radeon_vm_directory_size(rdev);
size += rdev->vm_manager.max_pfn * 8;
size *= 2;
r = radeon_sa_bo_manager_init(rdev, &rdev->vm_manager.sa_manager,
RADEON_GPU_PAGE_ALIGN(size),
RADEON_VM_PTB_ALIGN_SIZE,
RADEON_GEM_DOMAIN_VRAM);
if (r) {
dev_err(rdev->dev, "failed to allocate vm bo (%dKB)\n",
(rdev->vm_manager.max_pfn * 8) >> 10);
return r;
}
r = radeon_asic_vm_init(rdev);
if (r)
return r;
rdev->vm_manager.enabled = true;
r = radeon_sa_bo_manager_start(rdev, &rdev->vm_manager.sa_manager);
if (r)
return r;
}
/* restore page table */
list_for_each_entry(vm, &rdev->vm_manager.lru_vm, list) {
if (vm->page_directory == NULL)
continue;
list_for_each_entry(bo_va, &vm->va, vm_list) {
bo_va->valid = false;
}
}
return 0;
}
/**
* radeon_vm_free_pt - free the page table for a specific vm
*
* @rdev: radeon_device pointer
* @vm: vm to unbind
*
* Free the page table of a specific vm (cayman+).
*
* Global and local mutex must be lock!
*/
static void radeon_vm_free_pt(struct radeon_device *rdev,
struct radeon_vm *vm)
{
struct radeon_bo_va *bo_va;
int i;
if (!vm->page_directory)
return;
list_del_init(&vm->list);
radeon_sa_bo_free(rdev, &vm->page_directory, vm->fence);
list_for_each_entry(bo_va, &vm->va, vm_list) {
bo_va->valid = false;
}
if (vm->page_tables == NULL)
return;
for (i = 0; i < radeon_vm_num_pdes(rdev); i++)
radeon_sa_bo_free(rdev, &vm->page_tables[i], vm->fence);
kfree(vm->page_tables);
}
/**
* 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)
{
struct radeon_vm *vm, *tmp;
int i;
if (!rdev->vm_manager.enabled)
return;
mutex_lock(&rdev->vm_manager.lock);
/* free all allocated page tables */
list_for_each_entry_safe(vm, tmp, &rdev->vm_manager.lru_vm, list) {
mutex_lock(&vm->mutex);
radeon_vm_free_pt(rdev, vm);
mutex_unlock(&vm->mutex);
}
for (i = 0; i < RADEON_NUM_VM; ++i) {
radeon_fence_unref(&rdev->vm_manager.active[i]);
}
radeon_asic_vm_fini(rdev);
mutex_unlock(&rdev->vm_manager.lock);
radeon_sa_bo_manager_suspend(rdev, &rdev->vm_manager.sa_manager);
radeon_sa_bo_manager_fini(rdev, &rdev->vm_manager.sa_manager);
rdev->vm_manager.enabled = false;
}
/**
* radeon_vm_evict - evict page table to make room for new one
*
* @rdev: radeon_device pointer
* @vm: VM we want to allocate something for
*
* Evict a VM from the lru, making sure that it isn't @vm. (cayman+).
* Returns 0 for success, -ENOMEM for failure.
*
* Global and local mutex must be locked!
*/
static int radeon_vm_evict(struct radeon_device *rdev, struct radeon_vm *vm)
{
struct radeon_vm *vm_evict;
if (list_empty(&rdev->vm_manager.lru_vm))
return -ENOMEM;
vm_evict = list_first_entry(&rdev->vm_manager.lru_vm,
struct radeon_vm, list);
if (vm_evict == vm)
return -ENOMEM;
mutex_lock(&vm_evict->mutex);
radeon_vm_free_pt(rdev, vm_evict);
mutex_unlock(&vm_evict->mutex);
return 0;
}
/**
* radeon_vm_alloc_pt - allocates a page table for a VM
*
* @rdev: radeon_device pointer
* @vm: vm to bind
*
* Allocate a page table for the requested vm (cayman+).
* Returns 0 for success, error for failure.
*
* Global and local mutex must be locked!
*/
int radeon_vm_alloc_pt(struct radeon_device *rdev, struct radeon_vm *vm)
{
unsigned pd_size, pd_entries, pts_size;
struct radeon_ib ib;
int r;
if (vm == NULL) {
return -EINVAL;
}
if (vm->page_directory != NULL) {
return 0;
}
pd_size = radeon_vm_directory_size(rdev);
pd_entries = radeon_vm_num_pdes(rdev);
retry:
r = radeon_sa_bo_new(rdev, &rdev->vm_manager.sa_manager,
&vm->page_directory, pd_size,
RADEON_VM_PTB_ALIGN_SIZE, false);
if (r == -ENOMEM) {
r = radeon_vm_evict(rdev, vm);
if (r)
return r;
goto retry;
} else if (r) {
return r;
}
vm->pd_gpu_addr = radeon_sa_bo_gpu_addr(vm->page_directory);
/* Initially clear the page directory */
r = radeon_ib_get(rdev, R600_RING_TYPE_DMA_INDEX, &ib,
NULL, pd_entries * 2 + 64);
if (r) {
radeon_sa_bo_free(rdev, &vm->page_directory, vm->fence);
return r;
}
ib.length_dw = 0;
radeon_asic_vm_set_page(rdev, &ib, vm->pd_gpu_addr,
0, pd_entries, 0, 0);
radeon_semaphore_sync_to(ib.semaphore, vm->fence);
r = radeon_ib_schedule(rdev, &ib, NULL);
if (r) {
radeon_ib_free(rdev, &ib);
radeon_sa_bo_free(rdev, &vm->page_directory, vm->fence);
return r;
}
radeon_fence_unref(&vm->fence);
vm->fence = radeon_fence_ref(ib.fence);
radeon_ib_free(rdev, &ib);
radeon_fence_unref(&vm->last_flush);
/* allocate page table array */
pts_size = radeon_vm_num_pdes(rdev) * sizeof(struct radeon_sa_bo *);
vm->page_tables = kzalloc(pts_size, GFP_KERNEL);
if (vm->page_tables == NULL) {
DRM_ERROR("Cannot allocate memory for page table array\n");
radeon_sa_bo_free(rdev, &vm->page_directory, vm->fence);
return -ENOMEM;
}
return 0;
}
/**
* radeon_vm_add_to_lru - add VMs page table to LRU list
*
* @rdev: radeon_device pointer
* @vm: vm to add to LRU
*
* Add the allocated page table to the LRU list (cayman+).
*
* Global mutex must be locked!
*/
void radeon_vm_add_to_lru(struct radeon_device *rdev, struct radeon_vm *vm)
{
list_del_init(&vm->list);
list_add_tail(&vm->list, &rdev->vm_manager.lru_vm);
}
/**
* radeon_vm_grab_id - allocate the next free VMID
*
* @rdev: radeon_device pointer
* @vm: vm to allocate id for
* @ring: ring we want to submit job to
*
* Allocate an id for the vm (cayman+).
* Returns the fence we need to sync to (if any).
*
* Global and local mutex must be locked!
*/
struct radeon_fence *radeon_vm_grab_id(struct radeon_device *rdev,
struct radeon_vm *vm, int ring)
{
struct radeon_fence *best[RADEON_NUM_RINGS] = {};
unsigned choices[2] = {};
unsigned i;
/* check if the id is still valid */
if (vm->last_id_use && vm->last_id_use == rdev->vm_manager.active[vm->id])
return NULL;
/* we definately need to flush */
radeon_fence_unref(&vm->last_flush);
/* skip over VMID 0, since it is the system VM */
for (i = 1; i < rdev->vm_manager.nvm; ++i) {
struct radeon_fence *fence = rdev->vm_manager.active[i];
if (fence == NULL) {
/* found a free one */
vm->id = i;
trace_radeon_vm_grab_id(vm->id, ring);
return NULL;
}
if (radeon_fence_is_earlier(fence, best[fence->ring])) {
best[fence->ring] = fence;
choices[fence->ring == ring ? 0 : 1] = i;
}
}
for (i = 0; i < 2; ++i) {
if (choices[i]) {
vm->id = choices[i];
trace_radeon_vm_grab_id(vm->id, ring);
return rdev->vm_manager.active[choices[i]];
}
}
/* should never happen */
BUG();
return NULL;
}
/**
* radeon_vm_fence - remember fence for vm
*
* @rdev: radeon_device pointer
* @vm: vm we want to fence
* @fence: fence to remember
*
* Fence the vm (cayman+).
* Set the fence used to protect page table and id.
*
* Global and local mutex must be locked!
*/
void radeon_vm_fence(struct radeon_device *rdev,
struct radeon_vm *vm,
struct radeon_fence *fence)
{
radeon_fence_unref(&rdev->vm_manager.active[vm->id]);
rdev->vm_manager.active[vm->id] = radeon_fence_ref(fence);
radeon_fence_unref(&vm->fence);
vm->fence = radeon_fence_ref(fence);
radeon_fence_unref(&vm->last_id_use);
vm->last_id_use = radeon_fence_ref(fence);
}
/**
* radeon_vm_bo_find - find the bo_va for a specific vm & bo
*
* @vm: requested vm
* @bo: requested buffer object
*
* Find @bo inside the requested vm (cayman+).
* Search inside the @bos vm list for the requested vm
* Returns the found bo_va or NULL if none is found
*
* Object has to be reserved!
*/
struct radeon_bo_va *radeon_vm_bo_find(struct radeon_vm *vm,
struct radeon_bo *bo)
{
struct radeon_bo_va *bo_va;
list_for_each_entry(bo_va, &bo->va, bo_list) {
if (bo_va->vm == vm) {
return bo_va;
}
}
return NULL;
}
/**
* radeon_vm_bo_add - add a bo to a specific vm
*
* @rdev: radeon_device pointer
* @vm: requested vm
* @bo: radeon buffer object
*
* Add @bo into the requested vm (cayman+).
* Add @bo to the list of bos associated with the vm
* Returns newly added bo_va or NULL for failure
*
* Object has to be reserved!
*/
struct radeon_bo_va *radeon_vm_bo_add(struct radeon_device *rdev,
struct radeon_vm *vm,
struct radeon_bo *bo)
{
struct radeon_bo_va *bo_va;
bo_va = kzalloc(sizeof(struct radeon_bo_va), GFP_KERNEL);
if (bo_va == NULL) {
return NULL;
}
bo_va->vm = vm;
bo_va->bo = bo;
bo_va->soffset = 0;
bo_va->eoffset = 0;
bo_va->flags = 0;
bo_va->valid = false;
bo_va->ref_count = 1;
INIT_LIST_HEAD(&bo_va->bo_list);
INIT_LIST_HEAD(&bo_va->vm_list);
mutex_lock(&vm->mutex);
list_add(&bo_va->vm_list, &vm->va);
list_add_tail(&bo_va->bo_list, &bo->va);
mutex_unlock(&vm->mutex);
return bo_va;
}
/**
* radeon_vm_bo_set_addr - set bos virtual address inside a vm
*
* @rdev: radeon_device pointer
* @bo_va: bo_va to store the address
* @soffset: requested offset of the buffer in the VM address space
* @flags: attributes of pages (read/write/valid/etc.)
*
* Set offset of @bo_va (cayman+).
* Validate and set the offset requested within the vm address space.
* Returns 0 for success, error for failure.
*
* Object has to be reserved!
*/
int radeon_vm_bo_set_addr(struct radeon_device *rdev,
struct radeon_bo_va *bo_va,
uint64_t soffset,
uint32_t flags)
{
uint64_t size = radeon_bo_size(bo_va->bo);
uint64_t eoffset, last_offset = 0;
struct radeon_vm *vm = bo_va->vm;
struct radeon_bo_va *tmp;
struct list_head *head;
unsigned last_pfn;
if (soffset) {
/* make sure object fit at this offset */
eoffset = soffset + size;
if (soffset >= eoffset) {
return -EINVAL;
}
last_pfn = eoffset / RADEON_GPU_PAGE_SIZE;
if (last_pfn > rdev->vm_manager.max_pfn) {
dev_err(rdev->dev, "va above limit (0x%08X > 0x%08X)\n",
last_pfn, rdev->vm_manager.max_pfn);
return -EINVAL;
}
} else {
eoffset = last_pfn = 0;
}
mutex_lock(&vm->mutex);
head = &vm->va;
last_offset = 0;
list_for_each_entry(tmp, &vm->va, vm_list) {
if (bo_va == tmp) {
/* skip over currently modified bo */
continue;
}
if (soffset >= last_offset && eoffset <= tmp->soffset) {
/* bo can be added before this one */
break;
}
if (eoffset > tmp->soffset && soffset < tmp->eoffset) {
/* bo and tmp overlap, invalid offset */
dev_err(rdev->dev, "bo %p va 0x%08X conflict with (bo %p 0x%08X 0x%08X)\n",
bo_va->bo, (unsigned)bo_va->soffset, tmp->bo,
(unsigned)tmp->soffset, (unsigned)tmp->eoffset);
mutex_unlock(&vm->mutex);
return -EINVAL;
}
last_offset = tmp->eoffset;
head = &tmp->vm_list;
}
bo_va->soffset = soffset;
bo_va->eoffset = eoffset;
bo_va->flags = flags;
bo_va->valid = false;
list_move(&bo_va->vm_list, head);
mutex_unlock(&vm->mutex);
return 0;
}
/**
* radeon_vm_map_gart - get the physical address of a gart page
*
* @rdev: radeon_device pointer
* @addr: the unmapped addr
*
* Look up the physical address of the page that the pte resolves
* to (cayman+).
* Returns the physical address of the page.
*/
uint64_t radeon_vm_map_gart(struct radeon_device *rdev, uint64_t addr)
{
uint64_t result;
/* page table offset */
result = rdev->gart.pages_addr[addr >> PAGE_SHIFT];
/* in case cpu page size != gpu page size*/
result |= addr & (~PAGE_MASK);
return result;
}
/**
* radeon_vm_page_flags - translate page flags to what the hw uses
*
* @flags: flags comming from userspace
*
* Translate the flags the userspace ABI uses to hw flags.
*/
static uint32_t radeon_vm_page_flags(uint32_t flags)
{
uint32_t hw_flags = 0;
hw_flags |= (flags & RADEON_VM_PAGE_VALID) ? R600_PTE_VALID : 0;
hw_flags |= (flags & RADEON_VM_PAGE_READABLE) ? R600_PTE_READABLE : 0;
hw_flags |= (flags & RADEON_VM_PAGE_WRITEABLE) ? R600_PTE_WRITEABLE : 0;
if (flags & RADEON_VM_PAGE_SYSTEM) {
hw_flags |= R600_PTE_SYSTEM;
hw_flags |= (flags & RADEON_VM_PAGE_SNOOPED) ? R600_PTE_SNOOPED : 0;
}
return hw_flags;
}
/**
* radeon_vm_update_pdes - make sure that page directory is valid
*
* @rdev: radeon_device pointer
* @vm: requested vm
* @start: start of GPU address range
* @end: end of GPU address range
*
* Allocates new page tables if necessary
* and updates the page directory (cayman+).
* Returns 0 for success, error for failure.
*
* Global and local mutex must be locked!
*/
static int radeon_vm_update_pdes(struct radeon_device *rdev,
struct radeon_vm *vm,
struct radeon_ib *ib,
uint64_t start, uint64_t end)
{
static const uint32_t incr = RADEON_VM_PTE_COUNT * 8;
uint64_t last_pde = ~0, last_pt = ~0;
unsigned count = 0;
uint64_t pt_idx;
int r;
start = (start / RADEON_GPU_PAGE_SIZE) >> RADEON_VM_BLOCK_SIZE;
end = (end / RADEON_GPU_PAGE_SIZE) >> RADEON_VM_BLOCK_SIZE;
/* walk over the address space and update the page directory */
for (pt_idx = start; pt_idx <= end; ++pt_idx) {
uint64_t pde, pt;
if (vm->page_tables[pt_idx])
continue;
retry:
r = radeon_sa_bo_new(rdev, &rdev->vm_manager.sa_manager,
&vm->page_tables[pt_idx],
RADEON_VM_PTE_COUNT * 8,
RADEON_GPU_PAGE_SIZE, false);
if (r == -ENOMEM) {
r = radeon_vm_evict(rdev, vm);
if (r)
return r;
goto retry;
} else if (r) {
return r;
}
pde = vm->pd_gpu_addr + pt_idx * 8;
pt = radeon_sa_bo_gpu_addr(vm->page_tables[pt_idx]);
if (((last_pde + 8 * count) != pde) ||
((last_pt + incr * count) != pt)) {
if (count) {
radeon_asic_vm_set_page(rdev, ib, last_pde,
last_pt, count, incr,
R600_PTE_VALID);
count *= RADEON_VM_PTE_COUNT;
radeon_asic_vm_set_page(rdev, ib, last_pt, 0,
count, 0, 0);
}
count = 1;
last_pde = pde;
last_pt = pt;
} else {
++count;
}
}
if (count) {
radeon_asic_vm_set_page(rdev, ib, last_pde, last_pt, count,
incr, R600_PTE_VALID);
count *= RADEON_VM_PTE_COUNT;
radeon_asic_vm_set_page(rdev, ib, last_pt, 0,
count, 0, 0);
}
return 0;
}
/**
* radeon_vm_update_ptes - make sure that page tables are valid
*
* @rdev: radeon_device pointer
* @vm: requested vm
* @start: start of GPU address range
* @end: end of GPU address range
* @dst: destination address to map to
* @flags: mapping flags
*
* Update the page tables in the range @start - @end (cayman+).
*
* Global and local mutex must be locked!
*/
static void radeon_vm_update_ptes(struct radeon_device *rdev,
struct radeon_vm *vm,
struct radeon_ib *ib,
uint64_t start, uint64_t end,
uint64_t dst, uint32_t flags)
{
static const uint64_t mask = RADEON_VM_PTE_COUNT - 1;
uint64_t last_pte = ~0, last_dst = ~0;
unsigned count = 0;
uint64_t addr;
start = start / RADEON_GPU_PAGE_SIZE;
end = end / RADEON_GPU_PAGE_SIZE;
/* walk over the address space and update the page tables */
for (addr = start; addr < end; ) {
uint64_t pt_idx = addr >> RADEON_VM_BLOCK_SIZE;
unsigned nptes;
uint64_t pte;
if ((addr & ~mask) == (end & ~mask))
nptes = end - addr;
else
nptes = RADEON_VM_PTE_COUNT - (addr & mask);
pte = radeon_sa_bo_gpu_addr(vm->page_tables[pt_idx]);
pte += (addr & mask) * 8;
if ((last_pte + 8 * count) != pte) {
if (count) {
radeon_asic_vm_set_page(rdev, ib, last_pte,
last_dst, count,
RADEON_GPU_PAGE_SIZE,
flags);
}
count = nptes;
last_pte = pte;
last_dst = dst;
} else {
count += nptes;
}
addr += nptes;
dst += nptes * RADEON_GPU_PAGE_SIZE;
}
if (count) {
radeon_asic_vm_set_page(rdev, ib, last_pte,
last_dst, count,
RADEON_GPU_PAGE_SIZE, flags);
}
}
/**
* radeon_vm_bo_update - map a bo into the vm page table
*
* @rdev: radeon_device pointer
* @vm: requested vm
* @bo: radeon buffer object
* @mem: ttm mem
*
* Fill in the page table entries for @bo (cayman+).
* Returns 0 for success, -EINVAL for failure.
*
* Object have to be reserved & global and local mutex must be locked!
*/
int radeon_vm_bo_update(struct radeon_device *rdev,
struct radeon_vm *vm,
struct radeon_bo *bo,
struct ttm_mem_reg *mem)
{
struct radeon_ib ib;
struct radeon_bo_va *bo_va;
unsigned nptes, npdes, ndw;
uint64_t addr;
int r;
/* nothing to do if vm isn't bound */
if (vm->page_directory == NULL)
return 0;
bo_va = radeon_vm_bo_find(vm, bo);
if (bo_va == NULL) {
dev_err(rdev->dev, "bo %p not in vm %p\n", bo, vm);
return -EINVAL;
}
if (!bo_va->soffset) {
dev_err(rdev->dev, "bo %p don't has a mapping in vm %p\n",
bo, vm);
return -EINVAL;
}
if ((bo_va->valid && mem) || (!bo_va->valid && mem == NULL))
return 0;
bo_va->flags &= ~RADEON_VM_PAGE_VALID;
bo_va->flags &= ~RADEON_VM_PAGE_SYSTEM;
if (mem) {
addr = mem->start << PAGE_SHIFT;
if (mem->mem_type != TTM_PL_SYSTEM) {
bo_va->flags |= RADEON_VM_PAGE_VALID;
bo_va->valid = true;
}
if (mem->mem_type == TTM_PL_TT) {
bo_va->flags |= RADEON_VM_PAGE_SYSTEM;
} else {
addr += rdev->vm_manager.vram_base_offset;
}
} else {
addr = 0;
bo_va->valid = false;
}
trace_radeon_vm_bo_update(bo_va);
nptes = radeon_bo_ngpu_pages(bo);
/* assume two extra pdes in case the mapping overlaps the borders */
npdes = (nptes >> RADEON_VM_BLOCK_SIZE) + 2;
/* padding, etc. */
ndw = 64;
if (RADEON_VM_BLOCK_SIZE > 11)
/* reserve space for one header for every 2k dwords */
ndw += (nptes >> 11) * 4;
else
/* reserve space for one header for
every (1 << BLOCK_SIZE) entries */
ndw += (nptes >> RADEON_VM_BLOCK_SIZE) * 4;
/* reserve space for pte addresses */
ndw += nptes * 2;
/* reserve space for one header for every 2k dwords */
ndw += (npdes >> 11) * 4;
/* reserve space for pde addresses */
ndw += npdes * 2;
/* reserve space for clearing new page tables */
ndw += npdes * 2 * RADEON_VM_PTE_COUNT;
/* update too big for an IB */
if (ndw > 0xfffff)
return -ENOMEM;
r = radeon_ib_get(rdev, R600_RING_TYPE_DMA_INDEX, &ib, NULL, ndw * 4);
if (r)
return r;
ib.length_dw = 0;
r = radeon_vm_update_pdes(rdev, vm, &ib, bo_va->soffset, bo_va->eoffset);
if (r) {
radeon_ib_free(rdev, &ib);
return r;
}
radeon_vm_update_ptes(rdev, vm, &ib, bo_va->soffset, bo_va->eoffset,
addr, radeon_vm_page_flags(bo_va->flags));
radeon_semaphore_sync_to(ib.semaphore, vm->fence);
r = radeon_ib_schedule(rdev, &ib, NULL);
if (r) {
radeon_ib_free(rdev, &ib);
return r;
}
radeon_fence_unref(&vm->fence);
vm->fence = radeon_fence_ref(ib.fence);
radeon_ib_free(rdev, &ib);
radeon_fence_unref(&vm->last_flush);
return 0;
}
/**
* radeon_vm_bo_rmv - remove a bo to a specific vm
*
* @rdev: radeon_device pointer
* @bo_va: requested bo_va
*
* Remove @bo_va->bo from the requested vm (cayman+).
* Remove @bo_va->bo from the list of bos associated with the bo_va->vm and
* remove the ptes for @bo_va in the page table.
* Returns 0 for success.
*
* Object have to be reserved!
*/
int radeon_vm_bo_rmv(struct radeon_device *rdev,
struct radeon_bo_va *bo_va)
{
int r = 0;
mutex_lock(&rdev->vm_manager.lock);
mutex_lock(&bo_va->vm->mutex);
if (bo_va->soffset) {
r = radeon_vm_bo_update(rdev, bo_va->vm, bo_va->bo, NULL);
}
mutex_unlock(&rdev->vm_manager.lock);
list_del(&bo_va->vm_list);
mutex_unlock(&bo_va->vm->mutex);
list_del(&bo_va->bo_list);
kfree(bo_va);
return r;
}
/**
* radeon_vm_bo_invalidate - mark the bo as invalid
*
* @rdev: radeon_device pointer
* @vm: requested vm
* @bo: radeon buffer object
*
* Mark @bo as invalid (cayman+).
*/
void radeon_vm_bo_invalidate(struct radeon_device *rdev,
struct radeon_bo *bo)
{
struct radeon_bo_va *bo_va;
list_for_each_entry(bo_va, &bo->va, bo_list) {
bo_va->valid = false;
}
}
/**
* radeon_vm_init - initialize a vm instance
*
* @rdev: radeon_device pointer
* @vm: requested vm
*
* Init @vm fields (cayman+).
*/
void radeon_vm_init(struct radeon_device *rdev, struct radeon_vm *vm)
{
vm->id = 0;
vm->fence = NULL;
vm->last_flush = NULL;
vm->last_id_use = NULL;
mutex_init(&vm->mutex);
INIT_LIST_HEAD(&vm->list);
INIT_LIST_HEAD(&vm->va);
}
/**
* radeon_vm_fini - tear down a vm instance
*
* @rdev: radeon_device pointer
* @vm: requested vm
*
* Tear down @vm (cayman+).
* Unbind the VM and remove all bos from the vm bo list
*/
void radeon_vm_fini(struct radeon_device *rdev, struct radeon_vm *vm)
{
struct radeon_bo_va *bo_va, *tmp;
int r;
mutex_lock(&rdev->vm_manager.lock);
mutex_lock(&vm->mutex);
radeon_vm_free_pt(rdev, vm);
mutex_unlock(&rdev->vm_manager.lock);
if (!list_empty(&vm->va)) {
dev_err(rdev->dev, "still active bo inside vm\n");
}
list_for_each_entry_safe(bo_va, tmp, &vm->va, vm_list) {
list_del_init(&bo_va->vm_list);
r = radeon_bo_reserve(bo_va->bo, false);
if (!r) {
list_del_init(&bo_va->bo_list);
radeon_bo_unreserve(bo_va->bo);
kfree(bo_va);
}
}
radeon_fence_unref(&vm->fence);
radeon_fence_unref(&vm->last_flush);
radeon_fence_unref(&vm->last_id_use);
mutex_unlock(&vm->mutex);
}