[PATCH 1/5] drm/radeon: separate gart and vm functions
Alex Deucher
alexdeucher at gmail.com
Fri Feb 21 08:37:20 PST 2014
On Thu, Feb 20, 2014 at 3:20 PM, Christian König
<deathsimple at vodafone.de> wrote:
> From: Christian König <christian.koenig at amd.com>
>
> Both are complex enough on their own.
>
> Signed-off-by: Christian König <christian.koenig at amd.com>
For the series:
Reviewed-by: Alex Deucher <alexander.deucher at amd.com>
> ---
> drivers/gpu/drm/radeon/Makefile | 2 +-
> drivers/gpu/drm/radeon/radeon_gart.c | 958 ----------------------------------
> drivers/gpu/drm/radeon/radeon_vm.c | 981 +++++++++++++++++++++++++++++++++++
> 3 files changed, 982 insertions(+), 959 deletions(-)
> create mode 100644 drivers/gpu/drm/radeon/radeon_vm.c
>
> diff --git a/drivers/gpu/drm/radeon/Makefile b/drivers/gpu/drm/radeon/Makefile
> index ed60caa..0943353 100644
> --- a/drivers/gpu/drm/radeon/Makefile
> +++ b/drivers/gpu/drm/radeon/Makefile
> @@ -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 += \
> diff --git a/drivers/gpu/drm/radeon/radeon_gart.c b/drivers/gpu/drm/radeon/radeon_gart.c
> index a8f9b46..2e72365 100644
> --- a/drivers/gpu/drm/radeon/radeon_gart.c
> +++ b/drivers/gpu/drm/radeon/radeon_gart.c
> @@ -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);
> -}
> diff --git a/drivers/gpu/drm/radeon/radeon_vm.c b/drivers/gpu/drm/radeon/radeon_vm.c
> new file mode 100644
> index 0000000..433b1eb
> --- /dev/null
> +++ b/drivers/gpu/drm/radeon/radeon_vm.c
> @@ -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);
> +}
> --
> 1.8.3.2
>
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