| /* |
| * 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 <linux/fence-array.h> |
| #include <drm/drmP.h> |
| #include <drm/amdgpu_drm.h> |
| #include "amdgpu.h" |
| #include "amdgpu_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. |
| */ |
| |
| /* Special value that no flush is necessary */ |
| #define AMDGPU_VM_NO_FLUSH (~0ll) |
| |
| /* Local structure. Encapsulate some VM table update parameters to reduce |
| * the number of function parameters |
| */ |
| struct amdgpu_vm_update_params { |
| /* address where to copy page table entries from */ |
| uint64_t src; |
| /* DMA addresses to use for mapping */ |
| dma_addr_t *pages_addr; |
| /* indirect buffer to fill with commands */ |
| struct amdgpu_ib *ib; |
| }; |
| |
| /** |
| * amdgpu_vm_num_pde - return the number of page directory entries |
| * |
| * @adev: amdgpu_device pointer |
| * |
| * Calculate the number of page directory entries. |
| */ |
| static unsigned amdgpu_vm_num_pdes(struct amdgpu_device *adev) |
| { |
| return adev->vm_manager.max_pfn >> amdgpu_vm_block_size; |
| } |
| |
| /** |
| * amdgpu_vm_directory_size - returns the size of the page directory in bytes |
| * |
| * @adev: amdgpu_device pointer |
| * |
| * Calculate the size of the page directory in bytes. |
| */ |
| static unsigned amdgpu_vm_directory_size(struct amdgpu_device *adev) |
| { |
| return AMDGPU_GPU_PAGE_ALIGN(amdgpu_vm_num_pdes(adev) * 8); |
| } |
| |
| /** |
| * amdgpu_vm_get_pd_bo - add the VM PD to a validation list |
| * |
| * @vm: vm providing the BOs |
| * @validated: head of validation list |
| * @entry: entry to add |
| * |
| * Add the page directory to the list of BOs to |
| * validate for command submission. |
| */ |
| void amdgpu_vm_get_pd_bo(struct amdgpu_vm *vm, |
| struct list_head *validated, |
| struct amdgpu_bo_list_entry *entry) |
| { |
| entry->robj = vm->page_directory; |
| entry->priority = 0; |
| entry->tv.bo = &vm->page_directory->tbo; |
| entry->tv.shared = true; |
| entry->user_pages = NULL; |
| list_add(&entry->tv.head, validated); |
| } |
| |
| /** |
| * amdgpu_vm_get_bos - add the vm BOs to a duplicates list |
| * |
| * @adev: amdgpu device pointer |
| * @vm: vm providing the BOs |
| * @duplicates: head of duplicates list |
| * |
| * Add the page directory to the BO duplicates list |
| * for command submission. |
| */ |
| void amdgpu_vm_get_pt_bos(struct amdgpu_device *adev, struct amdgpu_vm *vm, |
| struct list_head *duplicates) |
| { |
| uint64_t num_evictions; |
| unsigned i; |
| |
| /* We only need to validate the page tables |
| * if they aren't already valid. |
| */ |
| num_evictions = atomic64_read(&adev->num_evictions); |
| if (num_evictions == vm->last_eviction_counter) |
| return; |
| |
| /* add the vm page table to the list */ |
| for (i = 0; i <= vm->max_pde_used; ++i) { |
| struct amdgpu_bo_list_entry *entry = &vm->page_tables[i].entry; |
| |
| if (!entry->robj) |
| continue; |
| |
| list_add(&entry->tv.head, duplicates); |
| } |
| |
| } |
| |
| /** |
| * amdgpu_vm_move_pt_bos_in_lru - move the PT BOs to the LRU tail |
| * |
| * @adev: amdgpu device instance |
| * @vm: vm providing the BOs |
| * |
| * Move the PT BOs to the tail of the LRU. |
| */ |
| void amdgpu_vm_move_pt_bos_in_lru(struct amdgpu_device *adev, |
| struct amdgpu_vm *vm) |
| { |
| struct ttm_bo_global *glob = adev->mman.bdev.glob; |
| unsigned i; |
| |
| spin_lock(&glob->lru_lock); |
| for (i = 0; i <= vm->max_pde_used; ++i) { |
| struct amdgpu_bo_list_entry *entry = &vm->page_tables[i].entry; |
| |
| if (!entry->robj) |
| continue; |
| |
| ttm_bo_move_to_lru_tail(&entry->robj->tbo); |
| } |
| spin_unlock(&glob->lru_lock); |
| } |
| |
| static bool amdgpu_vm_is_gpu_reset(struct amdgpu_device *adev, |
| struct amdgpu_vm_id *id) |
| { |
| return id->current_gpu_reset_count != |
| atomic_read(&adev->gpu_reset_counter) ? true : false; |
| } |
| |
| /** |
| * amdgpu_vm_grab_id - allocate the next free VMID |
| * |
| * @vm: vm to allocate id for |
| * @ring: ring we want to submit job to |
| * @sync: sync object where we add dependencies |
| * @fence: fence protecting ID from reuse |
| * |
| * Allocate an id for the vm, adding fences to the sync obj as necessary. |
| */ |
| int amdgpu_vm_grab_id(struct amdgpu_vm *vm, struct amdgpu_ring *ring, |
| struct amdgpu_sync *sync, struct fence *fence, |
| struct amdgpu_job *job) |
| { |
| struct amdgpu_device *adev = ring->adev; |
| uint64_t fence_context = adev->fence_context + ring->idx; |
| struct fence *updates = sync->last_vm_update; |
| struct amdgpu_vm_id *id, *idle; |
| struct fence **fences; |
| unsigned i; |
| int r = 0; |
| |
| fences = kmalloc_array(sizeof(void *), adev->vm_manager.num_ids, |
| GFP_KERNEL); |
| if (!fences) |
| return -ENOMEM; |
| |
| mutex_lock(&adev->vm_manager.lock); |
| |
| /* Check if we have an idle VMID */ |
| i = 0; |
| list_for_each_entry(idle, &adev->vm_manager.ids_lru, list) { |
| fences[i] = amdgpu_sync_peek_fence(&idle->active, ring); |
| if (!fences[i]) |
| break; |
| ++i; |
| } |
| |
| /* If we can't find a idle VMID to use, wait till one becomes available */ |
| if (&idle->list == &adev->vm_manager.ids_lru) { |
| u64 fence_context = adev->vm_manager.fence_context + ring->idx; |
| unsigned seqno = ++adev->vm_manager.seqno[ring->idx]; |
| struct fence_array *array; |
| unsigned j; |
| |
| for (j = 0; j < i; ++j) |
| fence_get(fences[j]); |
| |
| array = fence_array_create(i, fences, fence_context, |
| seqno, true); |
| if (!array) { |
| for (j = 0; j < i; ++j) |
| fence_put(fences[j]); |
| kfree(fences); |
| r = -ENOMEM; |
| goto error; |
| } |
| |
| |
| r = amdgpu_sync_fence(ring->adev, sync, &array->base); |
| fence_put(&array->base); |
| if (r) |
| goto error; |
| |
| mutex_unlock(&adev->vm_manager.lock); |
| return 0; |
| |
| } |
| kfree(fences); |
| |
| job->vm_needs_flush = true; |
| /* Check if we can use a VMID already assigned to this VM */ |
| i = ring->idx; |
| do { |
| struct fence *flushed; |
| |
| id = vm->ids[i++]; |
| if (i == AMDGPU_MAX_RINGS) |
| i = 0; |
| |
| /* Check all the prerequisites to using this VMID */ |
| if (!id) |
| continue; |
| if (amdgpu_vm_is_gpu_reset(adev, id)) |
| continue; |
| |
| if (atomic64_read(&id->owner) != vm->client_id) |
| continue; |
| |
| if (job->vm_pd_addr != id->pd_gpu_addr) |
| continue; |
| |
| if (!id->last_flush) |
| continue; |
| |
| if (id->last_flush->context != fence_context && |
| !fence_is_signaled(id->last_flush)) |
| continue; |
| |
| flushed = id->flushed_updates; |
| if (updates && |
| (!flushed || fence_is_later(updates, flushed))) |
| continue; |
| |
| /* Good we can use this VMID. Remember this submission as |
| * user of the VMID. |
| */ |
| r = amdgpu_sync_fence(ring->adev, &id->active, fence); |
| if (r) |
| goto error; |
| |
| id->current_gpu_reset_count = atomic_read(&adev->gpu_reset_counter); |
| list_move_tail(&id->list, &adev->vm_manager.ids_lru); |
| vm->ids[ring->idx] = id; |
| |
| job->vm_id = id - adev->vm_manager.ids; |
| job->vm_needs_flush = false; |
| trace_amdgpu_vm_grab_id(vm, ring->idx, job); |
| |
| mutex_unlock(&adev->vm_manager.lock); |
| return 0; |
| |
| } while (i != ring->idx); |
| |
| /* Still no ID to use? Then use the idle one found earlier */ |
| id = idle; |
| |
| /* Remember this submission as user of the VMID */ |
| r = amdgpu_sync_fence(ring->adev, &id->active, fence); |
| if (r) |
| goto error; |
| |
| fence_put(id->first); |
| id->first = fence_get(fence); |
| |
| fence_put(id->last_flush); |
| id->last_flush = NULL; |
| |
| fence_put(id->flushed_updates); |
| id->flushed_updates = fence_get(updates); |
| |
| id->pd_gpu_addr = job->vm_pd_addr; |
| id->current_gpu_reset_count = atomic_read(&adev->gpu_reset_counter); |
| list_move_tail(&id->list, &adev->vm_manager.ids_lru); |
| atomic64_set(&id->owner, vm->client_id); |
| vm->ids[ring->idx] = id; |
| |
| job->vm_id = id - adev->vm_manager.ids; |
| trace_amdgpu_vm_grab_id(vm, ring->idx, job); |
| |
| error: |
| mutex_unlock(&adev->vm_manager.lock); |
| return r; |
| } |
| |
| static bool amdgpu_vm_ring_has_compute_vm_bug(struct amdgpu_ring *ring) |
| { |
| struct amdgpu_device *adev = ring->adev; |
| const struct amdgpu_ip_block_version *ip_block; |
| |
| if (ring->type != AMDGPU_RING_TYPE_COMPUTE) |
| /* only compute rings */ |
| return false; |
| |
| ip_block = amdgpu_get_ip_block(adev, AMD_IP_BLOCK_TYPE_GFX); |
| if (!ip_block) |
| return false; |
| |
| if (ip_block->major <= 7) { |
| /* gfx7 has no workaround */ |
| return true; |
| } else if (ip_block->major == 8) { |
| if (adev->gfx.mec_fw_version >= 673) |
| /* gfx8 is fixed in MEC firmware 673 */ |
| return false; |
| else |
| return true; |
| } |
| return false; |
| } |
| |
| /** |
| * amdgpu_vm_flush - hardware flush the vm |
| * |
| * @ring: ring to use for flush |
| * @vm_id: vmid number to use |
| * @pd_addr: address of the page directory |
| * |
| * Emit a VM flush when it is necessary. |
| */ |
| int amdgpu_vm_flush(struct amdgpu_ring *ring, struct amdgpu_job *job) |
| { |
| struct amdgpu_device *adev = ring->adev; |
| struct amdgpu_vm_id *id = &adev->vm_manager.ids[job->vm_id]; |
| bool gds_switch_needed = ring->funcs->emit_gds_switch && ( |
| id->gds_base != job->gds_base || |
| id->gds_size != job->gds_size || |
| id->gws_base != job->gws_base || |
| id->gws_size != job->gws_size || |
| id->oa_base != job->oa_base || |
| id->oa_size != job->oa_size); |
| int r; |
| |
| if (ring->funcs->emit_pipeline_sync && ( |
| job->vm_needs_flush || gds_switch_needed || |
| amdgpu_vm_ring_has_compute_vm_bug(ring))) |
| amdgpu_ring_emit_pipeline_sync(ring); |
| |
| if (ring->funcs->emit_vm_flush && (job->vm_needs_flush || |
| amdgpu_vm_is_gpu_reset(adev, id))) { |
| struct fence *fence; |
| |
| trace_amdgpu_vm_flush(job->vm_pd_addr, ring->idx, job->vm_id); |
| amdgpu_ring_emit_vm_flush(ring, job->vm_id, job->vm_pd_addr); |
| |
| r = amdgpu_fence_emit(ring, &fence); |
| if (r) |
| return r; |
| |
| mutex_lock(&adev->vm_manager.lock); |
| fence_put(id->last_flush); |
| id->last_flush = fence; |
| mutex_unlock(&adev->vm_manager.lock); |
| } |
| |
| if (gds_switch_needed) { |
| id->gds_base = job->gds_base; |
| id->gds_size = job->gds_size; |
| id->gws_base = job->gws_base; |
| id->gws_size = job->gws_size; |
| id->oa_base = job->oa_base; |
| id->oa_size = job->oa_size; |
| amdgpu_ring_emit_gds_switch(ring, job->vm_id, |
| job->gds_base, job->gds_size, |
| job->gws_base, job->gws_size, |
| job->oa_base, job->oa_size); |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * amdgpu_vm_reset_id - reset VMID to zero |
| * |
| * @adev: amdgpu device structure |
| * @vm_id: vmid number to use |
| * |
| * Reset saved GDW, GWS and OA to force switch on next flush. |
| */ |
| void amdgpu_vm_reset_id(struct amdgpu_device *adev, unsigned vm_id) |
| { |
| struct amdgpu_vm_id *id = &adev->vm_manager.ids[vm_id]; |
| |
| id->gds_base = 0; |
| id->gds_size = 0; |
| id->gws_base = 0; |
| id->gws_size = 0; |
| id->oa_base = 0; |
| id->oa_size = 0; |
| } |
| |
| /** |
| * amdgpu_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. |
| * 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 amdgpu_bo_va *amdgpu_vm_bo_find(struct amdgpu_vm *vm, |
| struct amdgpu_bo *bo) |
| { |
| struct amdgpu_bo_va *bo_va; |
| |
| list_for_each_entry(bo_va, &bo->va, bo_list) { |
| if (bo_va->vm == vm) { |
| return bo_va; |
| } |
| } |
| return NULL; |
| } |
| |
| /** |
| * amdgpu_vm_update_pages - helper to call the right asic function |
| * |
| * @adev: amdgpu_device pointer |
| * @vm_update_params: see amdgpu_vm_update_params definition |
| * @pe: addr of the page entry |
| * @addr: dst addr to write into pe |
| * @count: number of page entries to update |
| * @incr: increase next addr by incr bytes |
| * @flags: hw access flags |
| * |
| * Traces the parameters and calls the right asic functions |
| * to setup the page table using the DMA. |
| */ |
| static void amdgpu_vm_update_pages(struct amdgpu_device *adev, |
| struct amdgpu_vm_update_params |
| *vm_update_params, |
| uint64_t pe, uint64_t addr, |
| unsigned count, uint32_t incr, |
| uint32_t flags) |
| { |
| trace_amdgpu_vm_set_page(pe, addr, count, incr, flags); |
| |
| if (vm_update_params->src) { |
| amdgpu_vm_copy_pte(adev, vm_update_params->ib, |
| pe, (vm_update_params->src + (addr >> 12) * 8), count); |
| |
| } else if (vm_update_params->pages_addr) { |
| amdgpu_vm_write_pte(adev, vm_update_params->ib, |
| vm_update_params->pages_addr, |
| pe, addr, count, incr, flags); |
| |
| } else if (count < 3) { |
| amdgpu_vm_write_pte(adev, vm_update_params->ib, NULL, pe, addr, |
| count, incr, flags); |
| |
| } else { |
| amdgpu_vm_set_pte_pde(adev, vm_update_params->ib, pe, addr, |
| count, incr, flags); |
| } |
| } |
| |
| /** |
| * amdgpu_vm_clear_bo - initially clear the page dir/table |
| * |
| * @adev: amdgpu_device pointer |
| * @bo: bo to clear |
| * |
| * need to reserve bo first before calling it. |
| */ |
| static int amdgpu_vm_clear_bo(struct amdgpu_device *adev, |
| struct amdgpu_vm *vm, |
| struct amdgpu_bo *bo) |
| { |
| struct amdgpu_ring *ring; |
| struct fence *fence = NULL; |
| struct amdgpu_job *job; |
| struct amdgpu_vm_update_params vm_update_params; |
| unsigned entries; |
| uint64_t addr; |
| int r; |
| |
| memset(&vm_update_params, 0, sizeof(vm_update_params)); |
| ring = container_of(vm->entity.sched, struct amdgpu_ring, sched); |
| |
| r = reservation_object_reserve_shared(bo->tbo.resv); |
| if (r) |
| return r; |
| |
| r = ttm_bo_validate(&bo->tbo, &bo->placement, true, false); |
| if (r) |
| goto error; |
| |
| addr = amdgpu_bo_gpu_offset(bo); |
| entries = amdgpu_bo_size(bo) / 8; |
| |
| r = amdgpu_job_alloc_with_ib(adev, 64, &job); |
| if (r) |
| goto error; |
| |
| vm_update_params.ib = &job->ibs[0]; |
| amdgpu_vm_update_pages(adev, &vm_update_params, addr, 0, entries, |
| 0, 0); |
| amdgpu_ring_pad_ib(ring, &job->ibs[0]); |
| |
| WARN_ON(job->ibs[0].length_dw > 64); |
| r = amdgpu_job_submit(job, ring, &vm->entity, |
| AMDGPU_FENCE_OWNER_VM, &fence); |
| if (r) |
| goto error_free; |
| |
| amdgpu_bo_fence(bo, fence, true); |
| fence_put(fence); |
| return 0; |
| |
| error_free: |
| amdgpu_job_free(job); |
| |
| error: |
| return r; |
| } |
| |
| /** |
| * amdgpu_vm_map_gart - Resolve gart mapping of addr |
| * |
| * @pages_addr: optional DMA address to use for lookup |
| * @addr: the unmapped addr |
| * |
| * Look up the physical address of the page that the pte resolves |
| * to and return the pointer for the page table entry. |
| */ |
| uint64_t amdgpu_vm_map_gart(const dma_addr_t *pages_addr, uint64_t addr) |
| { |
| uint64_t result; |
| |
| if (pages_addr) { |
| /* page table offset */ |
| result = pages_addr[addr >> PAGE_SHIFT]; |
| |
| /* in case cpu page size != gpu page size*/ |
| result |= addr & (~PAGE_MASK); |
| |
| } else { |
| /* No mapping required */ |
| result = addr; |
| } |
| |
| result &= 0xFFFFFFFFFFFFF000ULL; |
| |
| return result; |
| } |
| |
| /** |
| * amdgpu_vm_update_pdes - make sure that page directory is valid |
| * |
| * @adev: amdgpu_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. |
| * Returns 0 for success, error for failure. |
| */ |
| int amdgpu_vm_update_page_directory(struct amdgpu_device *adev, |
| struct amdgpu_vm *vm) |
| { |
| struct amdgpu_ring *ring; |
| struct amdgpu_bo *pd = vm->page_directory; |
| uint64_t pd_addr = amdgpu_bo_gpu_offset(pd); |
| uint32_t incr = AMDGPU_VM_PTE_COUNT * 8; |
| uint64_t last_pde = ~0, last_pt = ~0; |
| unsigned count = 0, pt_idx, ndw; |
| struct amdgpu_job *job; |
| struct amdgpu_vm_update_params vm_update_params; |
| struct fence *fence = NULL; |
| |
| int r; |
| |
| memset(&vm_update_params, 0, sizeof(vm_update_params)); |
| ring = container_of(vm->entity.sched, struct amdgpu_ring, sched); |
| |
| /* padding, etc. */ |
| ndw = 64; |
| |
| /* assume the worst case */ |
| ndw += vm->max_pde_used * 6; |
| |
| r = amdgpu_job_alloc_with_ib(adev, ndw * 4, &job); |
| if (r) |
| return r; |
| |
| vm_update_params.ib = &job->ibs[0]; |
| |
| /* walk over the address space and update the page directory */ |
| for (pt_idx = 0; pt_idx <= vm->max_pde_used; ++pt_idx) { |
| struct amdgpu_bo *bo = vm->page_tables[pt_idx].entry.robj; |
| uint64_t pde, pt; |
| |
| if (bo == NULL) |
| continue; |
| |
| pt = amdgpu_bo_gpu_offset(bo); |
| if (vm->page_tables[pt_idx].addr == pt) |
| continue; |
| vm->page_tables[pt_idx].addr = pt; |
| |
| pde = pd_addr + pt_idx * 8; |
| if (((last_pde + 8 * count) != pde) || |
| ((last_pt + incr * count) != pt)) { |
| |
| if (count) { |
| amdgpu_vm_update_pages(adev, &vm_update_params, |
| last_pde, last_pt, |
| count, incr, |
| AMDGPU_PTE_VALID); |
| } |
| |
| count = 1; |
| last_pde = pde; |
| last_pt = pt; |
| } else { |
| ++count; |
| } |
| } |
| |
| if (count) |
| amdgpu_vm_update_pages(adev, &vm_update_params, |
| last_pde, last_pt, |
| count, incr, AMDGPU_PTE_VALID); |
| |
| if (vm_update_params.ib->length_dw != 0) { |
| amdgpu_ring_pad_ib(ring, vm_update_params.ib); |
| amdgpu_sync_resv(adev, &job->sync, pd->tbo.resv, |
| AMDGPU_FENCE_OWNER_VM); |
| WARN_ON(vm_update_params.ib->length_dw > ndw); |
| r = amdgpu_job_submit(job, ring, &vm->entity, |
| AMDGPU_FENCE_OWNER_VM, &fence); |
| if (r) |
| goto error_free; |
| |
| amdgpu_bo_fence(pd, fence, true); |
| fence_put(vm->page_directory_fence); |
| vm->page_directory_fence = fence_get(fence); |
| fence_put(fence); |
| |
| } else { |
| amdgpu_job_free(job); |
| } |
| |
| return 0; |
| |
| error_free: |
| amdgpu_job_free(job); |
| return r; |
| } |
| |
| /** |
| * amdgpu_vm_frag_ptes - add fragment information to PTEs |
| * |
| * @adev: amdgpu_device pointer |
| * @vm_update_params: see amdgpu_vm_update_params definition |
| * @pe_start: first PTE to handle |
| * @pe_end: last PTE to handle |
| * @addr: addr those PTEs should point to |
| * @flags: hw mapping flags |
| */ |
| static void amdgpu_vm_frag_ptes(struct amdgpu_device *adev, |
| struct amdgpu_vm_update_params |
| *vm_update_params, |
| uint64_t pe_start, uint64_t pe_end, |
| uint64_t addr, uint32_t flags) |
| { |
| /** |
| * The MC L1 TLB supports variable sized pages, based on a fragment |
| * field in the PTE. When this field is set to a non-zero value, page |
| * granularity is increased from 4KB to (1 << (12 + frag)). The PTE |
| * flags are considered valid for all PTEs within the fragment range |
| * and corresponding mappings are assumed to be physically contiguous. |
| * |
| * The L1 TLB can store a single PTE for the whole fragment, |
| * significantly increasing the space available for translation |
| * caching. This leads to large improvements in throughput when the |
| * TLB is under pressure. |
| * |
| * The L2 TLB distributes small and large fragments into two |
| * asymmetric partitions. The large fragment cache is significantly |
| * larger. Thus, we try to use large fragments wherever possible. |
| * Userspace can support this by aligning virtual base address and |
| * allocation size to the fragment size. |
| */ |
| |
| /* SI and newer are optimized for 64KB */ |
| uint64_t frag_flags = AMDGPU_PTE_FRAG_64KB; |
| uint64_t frag_align = 0x80; |
| |
| uint64_t frag_start = ALIGN(pe_start, frag_align); |
| uint64_t frag_end = pe_end & ~(frag_align - 1); |
| |
| unsigned count; |
| |
| /* Abort early if there isn't anything to do */ |
| if (pe_start == pe_end) |
| return; |
| |
| /* system pages are non continuously */ |
| if (vm_update_params->src || vm_update_params->pages_addr || |
| !(flags & AMDGPU_PTE_VALID) || (frag_start >= frag_end)) { |
| |
| count = (pe_end - pe_start) / 8; |
| amdgpu_vm_update_pages(adev, vm_update_params, pe_start, |
| addr, count, AMDGPU_GPU_PAGE_SIZE, |
| flags); |
| return; |
| } |
| |
| /* handle the 4K area at the beginning */ |
| if (pe_start != frag_start) { |
| count = (frag_start - pe_start) / 8; |
| amdgpu_vm_update_pages(adev, vm_update_params, pe_start, addr, |
| count, AMDGPU_GPU_PAGE_SIZE, flags); |
| addr += AMDGPU_GPU_PAGE_SIZE * count; |
| } |
| |
| /* handle the area in the middle */ |
| count = (frag_end - frag_start) / 8; |
| amdgpu_vm_update_pages(adev, vm_update_params, frag_start, addr, count, |
| AMDGPU_GPU_PAGE_SIZE, flags | frag_flags); |
| |
| /* handle the 4K area at the end */ |
| if (frag_end != pe_end) { |
| addr += AMDGPU_GPU_PAGE_SIZE * count; |
| count = (pe_end - frag_end) / 8; |
| amdgpu_vm_update_pages(adev, vm_update_params, frag_end, addr, |
| count, AMDGPU_GPU_PAGE_SIZE, flags); |
| } |
| } |
| |
| /** |
| * amdgpu_vm_update_ptes - make sure that page tables are valid |
| * |
| * @adev: amdgpu_device pointer |
| * @vm_update_params: see amdgpu_vm_update_params definition |
| * @vm: requested vm |
| * @start: start of GPU address range |
| * @end: end of GPU address range |
| * @dst: destination address to map to, the next dst inside the function |
| * @flags: mapping flags |
| * |
| * Update the page tables in the range @start - @end. |
| */ |
| static void amdgpu_vm_update_ptes(struct amdgpu_device *adev, |
| struct amdgpu_vm_update_params |
| *vm_update_params, |
| struct amdgpu_vm *vm, |
| uint64_t start, uint64_t end, |
| uint64_t dst, uint32_t flags) |
| { |
| const uint64_t mask = AMDGPU_VM_PTE_COUNT - 1; |
| |
| uint64_t cur_pe_start, cur_pe_end, cur_dst; |
| uint64_t addr; /* next GPU address to be updated */ |
| uint64_t pt_idx; |
| struct amdgpu_bo *pt; |
| unsigned nptes; /* next number of ptes to be updated */ |
| uint64_t next_pe_start; |
| |
| /* initialize the variables */ |
| addr = start; |
| pt_idx = addr >> amdgpu_vm_block_size; |
| pt = vm->page_tables[pt_idx].entry.robj; |
| |
| if ((addr & ~mask) == (end & ~mask)) |
| nptes = end - addr; |
| else |
| nptes = AMDGPU_VM_PTE_COUNT - (addr & mask); |
| |
| cur_pe_start = amdgpu_bo_gpu_offset(pt); |
| cur_pe_start += (addr & mask) * 8; |
| cur_pe_end = cur_pe_start + 8 * nptes; |
| cur_dst = dst; |
| |
| /* for next ptb*/ |
| addr += nptes; |
| dst += nptes * AMDGPU_GPU_PAGE_SIZE; |
| |
| /* walk over the address space and update the page tables */ |
| while (addr < end) { |
| pt_idx = addr >> amdgpu_vm_block_size; |
| pt = vm->page_tables[pt_idx].entry.robj; |
| |
| if ((addr & ~mask) == (end & ~mask)) |
| nptes = end - addr; |
| else |
| nptes = AMDGPU_VM_PTE_COUNT - (addr & mask); |
| |
| next_pe_start = amdgpu_bo_gpu_offset(pt); |
| next_pe_start += (addr & mask) * 8; |
| |
| if (cur_pe_end == next_pe_start) { |
| /* The next ptb is consecutive to current ptb. |
| * Don't call amdgpu_vm_frag_ptes now. |
| * Will update two ptbs together in future. |
| */ |
| cur_pe_end += 8 * nptes; |
| } else { |
| amdgpu_vm_frag_ptes(adev, vm_update_params, |
| cur_pe_start, cur_pe_end, |
| cur_dst, flags); |
| |
| cur_pe_start = next_pe_start; |
| cur_pe_end = next_pe_start + 8 * nptes; |
| cur_dst = dst; |
| } |
| |
| /* for next ptb*/ |
| addr += nptes; |
| dst += nptes * AMDGPU_GPU_PAGE_SIZE; |
| } |
| |
| amdgpu_vm_frag_ptes(adev, vm_update_params, cur_pe_start, |
| cur_pe_end, cur_dst, flags); |
| } |
| |
| /** |
| * amdgpu_vm_bo_update_mapping - update a mapping in the vm page table |
| * |
| * @adev: amdgpu_device pointer |
| * @exclusive: fence we need to sync to |
| * @src: address where to copy page table entries from |
| * @pages_addr: DMA addresses to use for mapping |
| * @vm: requested vm |
| * @start: start of mapped range |
| * @last: last mapped entry |
| * @flags: flags for the entries |
| * @addr: addr to set the area to |
| * @fence: optional resulting fence |
| * |
| * Fill in the page table entries between @start and @last. |
| * Returns 0 for success, -EINVAL for failure. |
| */ |
| static int amdgpu_vm_bo_update_mapping(struct amdgpu_device *adev, |
| struct fence *exclusive, |
| uint64_t src, |
| dma_addr_t *pages_addr, |
| struct amdgpu_vm *vm, |
| uint64_t start, uint64_t last, |
| uint32_t flags, uint64_t addr, |
| struct fence **fence) |
| { |
| struct amdgpu_ring *ring; |
| void *owner = AMDGPU_FENCE_OWNER_VM; |
| unsigned nptes, ncmds, ndw; |
| struct amdgpu_job *job; |
| struct amdgpu_vm_update_params vm_update_params; |
| struct fence *f = NULL; |
| int r; |
| |
| ring = container_of(vm->entity.sched, struct amdgpu_ring, sched); |
| memset(&vm_update_params, 0, sizeof(vm_update_params)); |
| vm_update_params.src = src; |
| vm_update_params.pages_addr = pages_addr; |
| |
| /* sync to everything on unmapping */ |
| if (!(flags & AMDGPU_PTE_VALID)) |
| owner = AMDGPU_FENCE_OWNER_UNDEFINED; |
| |
| nptes = last - start + 1; |
| |
| /* |
| * reserve space for one command every (1 << BLOCK_SIZE) |
| * entries or 2k dwords (whatever is smaller) |
| */ |
| ncmds = (nptes >> min(amdgpu_vm_block_size, 11)) + 1; |
| |
| /* padding, etc. */ |
| ndw = 64; |
| |
| if (vm_update_params.src) { |
| /* only copy commands needed */ |
| ndw += ncmds * 7; |
| |
| } else if (vm_update_params.pages_addr) { |
| /* header for write data commands */ |
| ndw += ncmds * 4; |
| |
| /* body of write data command */ |
| ndw += nptes * 2; |
| |
| } else { |
| /* set page commands needed */ |
| ndw += ncmds * 10; |
| |
| /* two extra commands for begin/end of fragment */ |
| ndw += 2 * 10; |
| } |
| |
| r = amdgpu_job_alloc_with_ib(adev, ndw * 4, &job); |
| if (r) |
| return r; |
| |
| vm_update_params.ib = &job->ibs[0]; |
| |
| r = amdgpu_sync_fence(adev, &job->sync, exclusive); |
| if (r) |
| goto error_free; |
| |
| r = amdgpu_sync_resv(adev, &job->sync, vm->page_directory->tbo.resv, |
| owner); |
| if (r) |
| goto error_free; |
| |
| r = reservation_object_reserve_shared(vm->page_directory->tbo.resv); |
| if (r) |
| goto error_free; |
| |
| amdgpu_vm_update_ptes(adev, &vm_update_params, vm, start, |
| last + 1, addr, flags); |
| |
| amdgpu_ring_pad_ib(ring, vm_update_params.ib); |
| WARN_ON(vm_update_params.ib->length_dw > ndw); |
| r = amdgpu_job_submit(job, ring, &vm->entity, |
| AMDGPU_FENCE_OWNER_VM, &f); |
| if (r) |
| goto error_free; |
| |
| amdgpu_bo_fence(vm->page_directory, f, true); |
| if (fence) { |
| fence_put(*fence); |
| *fence = fence_get(f); |
| } |
| fence_put(f); |
| return 0; |
| |
| error_free: |
| amdgpu_job_free(job); |
| return r; |
| } |
| |
| /** |
| * amdgpu_vm_bo_split_mapping - split a mapping into smaller chunks |
| * |
| * @adev: amdgpu_device pointer |
| * @exclusive: fence we need to sync to |
| * @gtt_flags: flags as they are used for GTT |
| * @pages_addr: DMA addresses to use for mapping |
| * @vm: requested vm |
| * @mapping: mapped range and flags to use for the update |
| * @addr: addr to set the area to |
| * @flags: HW flags for the mapping |
| * @fence: optional resulting fence |
| * |
| * Split the mapping into smaller chunks so that each update fits |
| * into a SDMA IB. |
| * Returns 0 for success, -EINVAL for failure. |
| */ |
| static int amdgpu_vm_bo_split_mapping(struct amdgpu_device *adev, |
| struct fence *exclusive, |
| uint32_t gtt_flags, |
| dma_addr_t *pages_addr, |
| struct amdgpu_vm *vm, |
| struct amdgpu_bo_va_mapping *mapping, |
| uint32_t flags, uint64_t addr, |
| struct fence **fence) |
| { |
| const uint64_t max_size = 64ULL * 1024ULL * 1024ULL / AMDGPU_GPU_PAGE_SIZE; |
| |
| uint64_t src = 0, start = mapping->it.start; |
| int r; |
| |
| /* normally,bo_va->flags only contians READABLE and WIRTEABLE bit go here |
| * but in case of something, we filter the flags in first place |
| */ |
| if (!(mapping->flags & AMDGPU_PTE_READABLE)) |
| flags &= ~AMDGPU_PTE_READABLE; |
| if (!(mapping->flags & AMDGPU_PTE_WRITEABLE)) |
| flags &= ~AMDGPU_PTE_WRITEABLE; |
| |
| trace_amdgpu_vm_bo_update(mapping); |
| |
| if (pages_addr) { |
| if (flags == gtt_flags) |
| src = adev->gart.table_addr + (addr >> 12) * 8; |
| addr = 0; |
| } |
| addr += mapping->offset; |
| |
| if (!pages_addr || src) |
| return amdgpu_vm_bo_update_mapping(adev, exclusive, |
| src, pages_addr, vm, |
| start, mapping->it.last, |
| flags, addr, fence); |
| |
| while (start != mapping->it.last + 1) { |
| uint64_t last; |
| |
| last = min((uint64_t)mapping->it.last, start + max_size - 1); |
| r = amdgpu_vm_bo_update_mapping(adev, exclusive, |
| src, pages_addr, vm, |
| start, last, flags, addr, |
| fence); |
| if (r) |
| return r; |
| |
| start = last + 1; |
| addr += max_size * AMDGPU_GPU_PAGE_SIZE; |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * amdgpu_vm_bo_update - update all BO mappings in the vm page table |
| * |
| * @adev: amdgpu_device pointer |
| * @bo_va: requested BO and VM object |
| * @mem: ttm mem |
| * |
| * Fill in the page table entries for @bo_va. |
| * Returns 0 for success, -EINVAL for failure. |
| * |
| * Object have to be reserved and mutex must be locked! |
| */ |
| int amdgpu_vm_bo_update(struct amdgpu_device *adev, |
| struct amdgpu_bo_va *bo_va, |
| struct ttm_mem_reg *mem) |
| { |
| struct amdgpu_vm *vm = bo_va->vm; |
| struct amdgpu_bo_va_mapping *mapping; |
| dma_addr_t *pages_addr = NULL; |
| uint32_t gtt_flags, flags; |
| struct fence *exclusive; |
| uint64_t addr; |
| int r; |
| |
| if (mem) { |
| struct ttm_dma_tt *ttm; |
| |
| addr = (u64)mem->start << PAGE_SHIFT; |
| switch (mem->mem_type) { |
| case TTM_PL_TT: |
| ttm = container_of(bo_va->bo->tbo.ttm, struct |
| ttm_dma_tt, ttm); |
| pages_addr = ttm->dma_address; |
| break; |
| |
| case TTM_PL_VRAM: |
| addr += adev->vm_manager.vram_base_offset; |
| break; |
| |
| default: |
| break; |
| } |
| |
| exclusive = reservation_object_get_excl(bo_va->bo->tbo.resv); |
| } else { |
| addr = 0; |
| exclusive = NULL; |
| } |
| |
| flags = amdgpu_ttm_tt_pte_flags(adev, bo_va->bo->tbo.ttm, mem); |
| gtt_flags = (adev == bo_va->bo->adev) ? flags : 0; |
| |
| spin_lock(&vm->status_lock); |
| if (!list_empty(&bo_va->vm_status)) |
| list_splice_init(&bo_va->valids, &bo_va->invalids); |
| spin_unlock(&vm->status_lock); |
| |
| list_for_each_entry(mapping, &bo_va->invalids, list) { |
| r = amdgpu_vm_bo_split_mapping(adev, exclusive, |
| gtt_flags, pages_addr, vm, |
| mapping, flags, addr, |
| &bo_va->last_pt_update); |
| if (r) |
| return r; |
| } |
| |
| if (trace_amdgpu_vm_bo_mapping_enabled()) { |
| list_for_each_entry(mapping, &bo_va->valids, list) |
| trace_amdgpu_vm_bo_mapping(mapping); |
| |
| list_for_each_entry(mapping, &bo_va->invalids, list) |
| trace_amdgpu_vm_bo_mapping(mapping); |
| } |
| |
| spin_lock(&vm->status_lock); |
| list_splice_init(&bo_va->invalids, &bo_va->valids); |
| list_del_init(&bo_va->vm_status); |
| if (!mem) |
| list_add(&bo_va->vm_status, &vm->cleared); |
| spin_unlock(&vm->status_lock); |
| |
| return 0; |
| } |
| |
| /** |
| * amdgpu_vm_clear_freed - clear freed BOs in the PT |
| * |
| * @adev: amdgpu_device pointer |
| * @vm: requested vm |
| * |
| * Make sure all freed BOs are cleared in the PT. |
| * Returns 0 for success. |
| * |
| * PTs have to be reserved and mutex must be locked! |
| */ |
| int amdgpu_vm_clear_freed(struct amdgpu_device *adev, |
| struct amdgpu_vm *vm) |
| { |
| struct amdgpu_bo_va_mapping *mapping; |
| int r; |
| |
| while (!list_empty(&vm->freed)) { |
| mapping = list_first_entry(&vm->freed, |
| struct amdgpu_bo_va_mapping, list); |
| list_del(&mapping->list); |
| |
| r = amdgpu_vm_bo_split_mapping(adev, NULL, 0, NULL, vm, mapping, |
| 0, 0, NULL); |
| kfree(mapping); |
| if (r) |
| return r; |
| |
| } |
| return 0; |
| |
| } |
| |
| /** |
| * amdgpu_vm_clear_invalids - clear invalidated BOs in the PT |
| * |
| * @adev: amdgpu_device pointer |
| * @vm: requested vm |
| * |
| * Make sure all invalidated BOs are cleared in the PT. |
| * Returns 0 for success. |
| * |
| * PTs have to be reserved and mutex must be locked! |
| */ |
| int amdgpu_vm_clear_invalids(struct amdgpu_device *adev, |
| struct amdgpu_vm *vm, struct amdgpu_sync *sync) |
| { |
| struct amdgpu_bo_va *bo_va = NULL; |
| int r = 0; |
| |
| spin_lock(&vm->status_lock); |
| while (!list_empty(&vm->invalidated)) { |
| bo_va = list_first_entry(&vm->invalidated, |
| struct amdgpu_bo_va, vm_status); |
| spin_unlock(&vm->status_lock); |
| |
| r = amdgpu_vm_bo_update(adev, bo_va, NULL); |
| if (r) |
| return r; |
| |
| spin_lock(&vm->status_lock); |
| } |
| spin_unlock(&vm->status_lock); |
| |
| if (bo_va) |
| r = amdgpu_sync_fence(adev, sync, bo_va->last_pt_update); |
| |
| return r; |
| } |
| |
| /** |
| * amdgpu_vm_bo_add - add a bo to a specific vm |
| * |
| * @adev: amdgpu_device pointer |
| * @vm: requested vm |
| * @bo: amdgpu buffer object |
| * |
| * Add @bo into the requested vm. |
| * 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 amdgpu_bo_va *amdgpu_vm_bo_add(struct amdgpu_device *adev, |
| struct amdgpu_vm *vm, |
| struct amdgpu_bo *bo) |
| { |
| struct amdgpu_bo_va *bo_va; |
| |
| bo_va = kzalloc(sizeof(struct amdgpu_bo_va), GFP_KERNEL); |
| if (bo_va == NULL) { |
| return NULL; |
| } |
| bo_va->vm = vm; |
| bo_va->bo = bo; |
| bo_va->ref_count = 1; |
| INIT_LIST_HEAD(&bo_va->bo_list); |
| INIT_LIST_HEAD(&bo_va->valids); |
| INIT_LIST_HEAD(&bo_va->invalids); |
| INIT_LIST_HEAD(&bo_va->vm_status); |
| |
| list_add_tail(&bo_va->bo_list, &bo->va); |
| |
| return bo_va; |
| } |
| |
| /** |
| * amdgpu_vm_bo_map - map bo inside a vm |
| * |
| * @adev: amdgpu_device pointer |
| * @bo_va: bo_va to store the address |
| * @saddr: where to map the BO |
| * @offset: requested offset in the BO |
| * @flags: attributes of pages (read/write/valid/etc.) |
| * |
| * Add a mapping of the BO at the specefied addr into the VM. |
| * Returns 0 for success, error for failure. |
| * |
| * Object has to be reserved and unreserved outside! |
| */ |
| int amdgpu_vm_bo_map(struct amdgpu_device *adev, |
| struct amdgpu_bo_va *bo_va, |
| uint64_t saddr, uint64_t offset, |
| uint64_t size, uint32_t flags) |
| { |
| struct amdgpu_bo_va_mapping *mapping; |
| struct amdgpu_vm *vm = bo_va->vm; |
| struct interval_tree_node *it; |
| unsigned last_pfn, pt_idx; |
| uint64_t eaddr; |
| int r; |
| |
| /* validate the parameters */ |
| if (saddr & AMDGPU_GPU_PAGE_MASK || offset & AMDGPU_GPU_PAGE_MASK || |
| size == 0 || size & AMDGPU_GPU_PAGE_MASK) |
| return -EINVAL; |
| |
| /* make sure object fit at this offset */ |
| eaddr = saddr + size - 1; |
| if ((saddr >= eaddr) || (offset + size > amdgpu_bo_size(bo_va->bo))) |
| return -EINVAL; |
| |
| last_pfn = eaddr / AMDGPU_GPU_PAGE_SIZE; |
| if (last_pfn >= adev->vm_manager.max_pfn) { |
| dev_err(adev->dev, "va above limit (0x%08X >= 0x%08X)\n", |
| last_pfn, adev->vm_manager.max_pfn); |
| return -EINVAL; |
| } |
| |
| saddr /= AMDGPU_GPU_PAGE_SIZE; |
| eaddr /= AMDGPU_GPU_PAGE_SIZE; |
| |
| it = interval_tree_iter_first(&vm->va, saddr, eaddr); |
| if (it) { |
| struct amdgpu_bo_va_mapping *tmp; |
| tmp = container_of(it, struct amdgpu_bo_va_mapping, it); |
| /* bo and tmp overlap, invalid addr */ |
| dev_err(adev->dev, "bo %p va 0x%010Lx-0x%010Lx conflict with " |
| "0x%010lx-0x%010lx\n", bo_va->bo, saddr, eaddr, |
| tmp->it.start, tmp->it.last + 1); |
| r = -EINVAL; |
| goto error; |
| } |
| |
| mapping = kmalloc(sizeof(*mapping), GFP_KERNEL); |
| if (!mapping) { |
| r = -ENOMEM; |
| goto error; |
| } |
| |
| INIT_LIST_HEAD(&mapping->list); |
| mapping->it.start = saddr; |
| mapping->it.last = eaddr; |
| mapping->offset = offset; |
| mapping->flags = flags; |
| |
| list_add(&mapping->list, &bo_va->invalids); |
| interval_tree_insert(&mapping->it, &vm->va); |
| |
| /* Make sure the page tables are allocated */ |
| saddr >>= amdgpu_vm_block_size; |
| eaddr >>= amdgpu_vm_block_size; |
| |
| BUG_ON(eaddr >= amdgpu_vm_num_pdes(adev)); |
| |
| if (eaddr > vm->max_pde_used) |
| vm->max_pde_used = eaddr; |
| |
| /* walk over the address space and allocate the page tables */ |
| for (pt_idx = saddr; pt_idx <= eaddr; ++pt_idx) { |
| struct reservation_object *resv = vm->page_directory->tbo.resv; |
| struct amdgpu_bo_list_entry *entry; |
| struct amdgpu_bo *pt; |
| |
| entry = &vm->page_tables[pt_idx].entry; |
| if (entry->robj) |
| continue; |
| |
| r = amdgpu_bo_create(adev, AMDGPU_VM_PTE_COUNT * 8, |
| AMDGPU_GPU_PAGE_SIZE, true, |
| AMDGPU_GEM_DOMAIN_VRAM, |
| AMDGPU_GEM_CREATE_NO_CPU_ACCESS, |
| NULL, resv, &pt); |
| if (r) |
| goto error_free; |
| |
| /* Keep a reference to the page table to avoid freeing |
| * them up in the wrong order. |
| */ |
| pt->parent = amdgpu_bo_ref(vm->page_directory); |
| |
| r = amdgpu_vm_clear_bo(adev, vm, pt); |
| if (r) { |
| amdgpu_bo_unref(&pt); |
| goto error_free; |
| } |
| |
| entry->robj = pt; |
| entry->priority = 0; |
| entry->tv.bo = &entry->robj->tbo; |
| entry->tv.shared = true; |
| entry->user_pages = NULL; |
| vm->page_tables[pt_idx].addr = 0; |
| } |
| |
| return 0; |
| |
| error_free: |
| list_del(&mapping->list); |
| interval_tree_remove(&mapping->it, &vm->va); |
| trace_amdgpu_vm_bo_unmap(bo_va, mapping); |
| kfree(mapping); |
| |
| error: |
| return r; |
| } |
| |
| /** |
| * amdgpu_vm_bo_unmap - remove bo mapping from vm |
| * |
| * @adev: amdgpu_device pointer |
| * @bo_va: bo_va to remove the address from |
| * @saddr: where to the BO is mapped |
| * |
| * Remove a mapping of the BO at the specefied addr from the VM. |
| * Returns 0 for success, error for failure. |
| * |
| * Object has to be reserved and unreserved outside! |
| */ |
| int amdgpu_vm_bo_unmap(struct amdgpu_device *adev, |
| struct amdgpu_bo_va *bo_va, |
| uint64_t saddr) |
| { |
| struct amdgpu_bo_va_mapping *mapping; |
| struct amdgpu_vm *vm = bo_va->vm; |
| bool valid = true; |
| |
| saddr /= AMDGPU_GPU_PAGE_SIZE; |
| |
| list_for_each_entry(mapping, &bo_va->valids, list) { |
| if (mapping->it.start == saddr) |
| break; |
| } |
| |
| if (&mapping->list == &bo_va->valids) { |
| valid = false; |
| |
| list_for_each_entry(mapping, &bo_va->invalids, list) { |
| if (mapping->it.start == saddr) |
| break; |
| } |
| |
| if (&mapping->list == &bo_va->invalids) |
| return -ENOENT; |
| } |
| |
| list_del(&mapping->list); |
| interval_tree_remove(&mapping->it, &vm->va); |
| trace_amdgpu_vm_bo_unmap(bo_va, mapping); |
| |
| if (valid) |
| list_add(&mapping->list, &vm->freed); |
| else |
| kfree(mapping); |
| |
| return 0; |
| } |
| |
| /** |
| * amdgpu_vm_bo_rmv - remove a bo to a specific vm |
| * |
| * @adev: amdgpu_device pointer |
| * @bo_va: requested bo_va |
| * |
| * Remove @bo_va->bo from the requested vm. |
| * |
| * Object have to be reserved! |
| */ |
| void amdgpu_vm_bo_rmv(struct amdgpu_device *adev, |
| struct amdgpu_bo_va *bo_va) |
| { |
| struct amdgpu_bo_va_mapping *mapping, *next; |
| struct amdgpu_vm *vm = bo_va->vm; |
| |
| list_del(&bo_va->bo_list); |
| |
| spin_lock(&vm->status_lock); |
| list_del(&bo_va->vm_status); |
| spin_unlock(&vm->status_lock); |
| |
| list_for_each_entry_safe(mapping, next, &bo_va->valids, list) { |
| list_del(&mapping->list); |
| interval_tree_remove(&mapping->it, &vm->va); |
| trace_amdgpu_vm_bo_unmap(bo_va, mapping); |
| list_add(&mapping->list, &vm->freed); |
| } |
| list_for_each_entry_safe(mapping, next, &bo_va->invalids, list) { |
| list_del(&mapping->list); |
| interval_tree_remove(&mapping->it, &vm->va); |
| kfree(mapping); |
| } |
| |
| fence_put(bo_va->last_pt_update); |
| kfree(bo_va); |
| } |
| |
| /** |
| * amdgpu_vm_bo_invalidate - mark the bo as invalid |
| * |
| * @adev: amdgpu_device pointer |
| * @vm: requested vm |
| * @bo: amdgpu buffer object |
| * |
| * Mark @bo as invalid. |
| */ |
| void amdgpu_vm_bo_invalidate(struct amdgpu_device *adev, |
| struct amdgpu_bo *bo) |
| { |
| struct amdgpu_bo_va *bo_va; |
| |
| list_for_each_entry(bo_va, &bo->va, bo_list) { |
| spin_lock(&bo_va->vm->status_lock); |
| if (list_empty(&bo_va->vm_status)) |
| list_add(&bo_va->vm_status, &bo_va->vm->invalidated); |
| spin_unlock(&bo_va->vm->status_lock); |
| } |
| } |
| |
| /** |
| * amdgpu_vm_init - initialize a vm instance |
| * |
| * @adev: amdgpu_device pointer |
| * @vm: requested vm |
| * |
| * Init @vm fields. |
| */ |
| int amdgpu_vm_init(struct amdgpu_device *adev, struct amdgpu_vm *vm) |
| { |
| const unsigned align = min(AMDGPU_VM_PTB_ALIGN_SIZE, |
| AMDGPU_VM_PTE_COUNT * 8); |
| unsigned pd_size, pd_entries; |
| unsigned ring_instance; |
| struct amdgpu_ring *ring; |
| struct amd_sched_rq *rq; |
| int i, r; |
| |
| for (i = 0; i < AMDGPU_MAX_RINGS; ++i) |
| vm->ids[i] = NULL; |
| vm->va = RB_ROOT; |
| vm->client_id = atomic64_inc_return(&adev->vm_manager.client_counter); |
| spin_lock_init(&vm->status_lock); |
| INIT_LIST_HEAD(&vm->invalidated); |
| INIT_LIST_HEAD(&vm->cleared); |
| INIT_LIST_HEAD(&vm->freed); |
| |
| pd_size = amdgpu_vm_directory_size(adev); |
| pd_entries = amdgpu_vm_num_pdes(adev); |
| |
| /* allocate page table array */ |
| vm->page_tables = drm_calloc_large(pd_entries, sizeof(struct amdgpu_vm_pt)); |
| if (vm->page_tables == NULL) { |
| DRM_ERROR("Cannot allocate memory for page table array\n"); |
| return -ENOMEM; |
| } |
| |
| /* create scheduler entity for page table updates */ |
| |
| ring_instance = atomic_inc_return(&adev->vm_manager.vm_pte_next_ring); |
| ring_instance %= adev->vm_manager.vm_pte_num_rings; |
| ring = adev->vm_manager.vm_pte_rings[ring_instance]; |
| rq = &ring->sched.sched_rq[AMD_SCHED_PRIORITY_KERNEL]; |
| r = amd_sched_entity_init(&ring->sched, &vm->entity, |
| rq, amdgpu_sched_jobs); |
| if (r) |
| goto err; |
| |
| vm->page_directory_fence = NULL; |
| |
| r = amdgpu_bo_create(adev, pd_size, align, true, |
| AMDGPU_GEM_DOMAIN_VRAM, |
| AMDGPU_GEM_CREATE_NO_CPU_ACCESS, |
| NULL, NULL, &vm->page_directory); |
| if (r) |
| goto error_free_sched_entity; |
| |
| r = amdgpu_bo_reserve(vm->page_directory, false); |
| if (r) |
| goto error_free_page_directory; |
| |
| r = amdgpu_vm_clear_bo(adev, vm, vm->page_directory); |
| amdgpu_bo_unreserve(vm->page_directory); |
| if (r) |
| goto error_free_page_directory; |
| vm->last_eviction_counter = atomic64_read(&adev->num_evictions); |
| |
| return 0; |
| |
| error_free_page_directory: |
| amdgpu_bo_unref(&vm->page_directory); |
| vm->page_directory = NULL; |
| |
| error_free_sched_entity: |
| amd_sched_entity_fini(&ring->sched, &vm->entity); |
| |
| err: |
| drm_free_large(vm->page_tables); |
| |
| return r; |
| } |
| |
| /** |
| * amdgpu_vm_fini - tear down a vm instance |
| * |
| * @adev: amdgpu_device pointer |
| * @vm: requested vm |
| * |
| * Tear down @vm. |
| * Unbind the VM and remove all bos from the vm bo list |
| */ |
| void amdgpu_vm_fini(struct amdgpu_device *adev, struct amdgpu_vm *vm) |
| { |
| struct amdgpu_bo_va_mapping *mapping, *tmp; |
| int i; |
| |
| amd_sched_entity_fini(vm->entity.sched, &vm->entity); |
| |
| if (!RB_EMPTY_ROOT(&vm->va)) { |
| dev_err(adev->dev, "still active bo inside vm\n"); |
| } |
| rbtree_postorder_for_each_entry_safe(mapping, tmp, &vm->va, it.rb) { |
| list_del(&mapping->list); |
| interval_tree_remove(&mapping->it, &vm->va); |
| kfree(mapping); |
| } |
| list_for_each_entry_safe(mapping, tmp, &vm->freed, list) { |
| list_del(&mapping->list); |
| kfree(mapping); |
| } |
| |
| for (i = 0; i < amdgpu_vm_num_pdes(adev); i++) |
| amdgpu_bo_unref(&vm->page_tables[i].entry.robj); |
| drm_free_large(vm->page_tables); |
| |
| amdgpu_bo_unref(&vm->page_directory); |
| fence_put(vm->page_directory_fence); |
| } |
| |
| /** |
| * amdgpu_vm_manager_init - init the VM manager |
| * |
| * @adev: amdgpu_device pointer |
| * |
| * Initialize the VM manager structures |
| */ |
| void amdgpu_vm_manager_init(struct amdgpu_device *adev) |
| { |
| unsigned i; |
| |
| INIT_LIST_HEAD(&adev->vm_manager.ids_lru); |
| |
| /* skip over VMID 0, since it is the system VM */ |
| for (i = 1; i < adev->vm_manager.num_ids; ++i) { |
| amdgpu_vm_reset_id(adev, i); |
| amdgpu_sync_create(&adev->vm_manager.ids[i].active); |
| list_add_tail(&adev->vm_manager.ids[i].list, |
| &adev->vm_manager.ids_lru); |
| } |
| |
| adev->vm_manager.fence_context = fence_context_alloc(AMDGPU_MAX_RINGS); |
| for (i = 0; i < AMDGPU_MAX_RINGS; ++i) |
| adev->vm_manager.seqno[i] = 0; |
| |
| atomic_set(&adev->vm_manager.vm_pte_next_ring, 0); |
| atomic64_set(&adev->vm_manager.client_counter, 0); |
| } |
| |
| /** |
| * amdgpu_vm_manager_fini - cleanup VM manager |
| * |
| * @adev: amdgpu_device pointer |
| * |
| * Cleanup the VM manager and free resources. |
| */ |
| void amdgpu_vm_manager_fini(struct amdgpu_device *adev) |
| { |
| unsigned i; |
| |
| for (i = 0; i < AMDGPU_NUM_VM; ++i) { |
| struct amdgpu_vm_id *id = &adev->vm_manager.ids[i]; |
| |
| fence_put(adev->vm_manager.ids[i].first); |
| amdgpu_sync_free(&adev->vm_manager.ids[i].active); |
| fence_put(id->flushed_updates); |
| } |
| } |