[PATCH 1/5] drm/radeon: separate gart and vm functions
Christian König
deathsimple at vodafone.de
Thu Feb 20 12:20:59 PST 2014
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>
---
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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