diff options
Diffstat (limited to 'drivers/gpu/drm/radeon/radeon_vm.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_vm.c | 1268 |
1 files changed, 1268 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_vm.c b/drivers/gpu/drm/radeon/radeon_vm.c new file mode 100644 index 000000000..7f1a9c787 --- /dev/null +++ b/drivers/gpu/drm/radeon/radeon_vm.c @@ -0,0 +1,1268 @@ +/* + * Copyright 2008 Advanced Micro Devices, Inc. + * Copyright 2008 Red Hat Inc. + * Copyright 2009 Jerome Glisse. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + * + * Authors: Dave Airlie + * Alex Deucher + * Jerome Glisse + */ +#include <drm/drmP.h> +#include <drm/radeon_drm.h> +#include "radeon.h" +#include "radeon_trace.h" + +/* + * GPUVM + * GPUVM is similar to the legacy gart on older asics, however + * rather than there being a single global gart table + * for the entire GPU, there are multiple VM page tables active + * at any given time. The VM page tables can contain a mix + * vram pages and system memory pages and system memory pages + * can be mapped as snooped (cached system pages) or unsnooped + * (uncached system pages). + * Each VM has an ID associated with it and there is a page table + * associated with each VMID. When execting a command buffer, + * the kernel tells the the ring what VMID to use for that command + * buffer. VMIDs are allocated dynamically as commands are submitted. + * The userspace drivers maintain their own address space and the kernel + * sets up their pages tables accordingly when they submit their + * command buffers and a VMID is assigned. + * Cayman/Trinity support up to 8 active VMs at any given time; + * SI supports 16. + */ + +/** + * radeon_vm_num_pde - return the number of page directory entries + * + * @rdev: radeon_device pointer + * + * Calculate the number of page directory entries (cayman+). + */ +static unsigned radeon_vm_num_pdes(struct radeon_device *rdev) +{ + return rdev->vm_manager.max_pfn >> radeon_vm_block_size; +} + +/** + * radeon_vm_directory_size - returns the size of the page directory in bytes + * + * @rdev: radeon_device pointer + * + * Calculate the size of the page directory in bytes (cayman+). + */ +static unsigned radeon_vm_directory_size(struct radeon_device *rdev) +{ + return RADEON_GPU_PAGE_ALIGN(radeon_vm_num_pdes(rdev) * 8); +} + +/** + * radeon_vm_manager_init - init the vm manager + * + * @rdev: radeon_device pointer + * + * Init the vm manager (cayman+). + * Returns 0 for success, error for failure. + */ +int radeon_vm_manager_init(struct radeon_device *rdev) +{ + int r; + + if (!rdev->vm_manager.enabled) { + r = radeon_asic_vm_init(rdev); + if (r) + return r; + + rdev->vm_manager.enabled = true; + } + return 0; +} + +/** + * radeon_vm_manager_fini - tear down the vm manager + * + * @rdev: radeon_device pointer + * + * Tear down the VM manager (cayman+). + */ +void radeon_vm_manager_fini(struct radeon_device *rdev) +{ + int i; + + if (!rdev->vm_manager.enabled) + return; + + for (i = 0; i < RADEON_NUM_VM; ++i) + radeon_fence_unref(&rdev->vm_manager.active[i]); + radeon_asic_vm_fini(rdev); + rdev->vm_manager.enabled = false; +} + +/** + * radeon_vm_get_bos - add the vm BOs to a validation list + * + * @vm: vm providing the BOs + * @head: head of validation list + * + * Add the page directory to the list of BOs to + * validate for command submission (cayman+). + */ +struct radeon_bo_list *radeon_vm_get_bos(struct radeon_device *rdev, + struct radeon_vm *vm, + struct list_head *head) +{ + struct radeon_bo_list *list; + unsigned i, idx; + + list = kvmalloc_array(vm->max_pde_used + 2, + sizeof(struct radeon_bo_list), GFP_KERNEL); + if (!list) + return NULL; + + /* add the vm page table to the list */ + list[0].robj = vm->page_directory; + list[0].preferred_domains = RADEON_GEM_DOMAIN_VRAM; + list[0].allowed_domains = RADEON_GEM_DOMAIN_VRAM; + list[0].tv.bo = &vm->page_directory->tbo; + list[0].tv.shared = true; + list[0].tiling_flags = 0; + list_add(&list[0].tv.head, head); + + for (i = 0, idx = 1; i <= vm->max_pde_used; i++) { + if (!vm->page_tables[i].bo) + continue; + + list[idx].robj = vm->page_tables[i].bo; + list[idx].preferred_domains = RADEON_GEM_DOMAIN_VRAM; + list[idx].allowed_domains = RADEON_GEM_DOMAIN_VRAM; + list[idx].tv.bo = &list[idx].robj->tbo; + list[idx].tv.shared = true; + list[idx].tiling_flags = 0; + list_add(&list[idx++].tv.head, head); + } + + return list; +} + +/** + * 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] = {}; + struct radeon_vm_id *vm_id = &vm->ids[ring]; + + unsigned choices[2] = {}; + unsigned i; + + /* check if the id is still valid */ + if (vm_id->id && vm_id->last_id_use && + vm_id->last_id_use == rdev->vm_manager.active[vm_id->id]) + return NULL; + + /* we definately need to flush */ + vm_id->pd_gpu_addr = ~0ll; + + /* 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->id = i; + trace_radeon_vm_grab_id(i, 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->id = choices[i]; + trace_radeon_vm_grab_id(choices[i], ring); + return rdev->vm_manager.active[choices[i]]; + } + } + + /* should never happen */ + BUG(); + return NULL; +} + +/** + * radeon_vm_flush - hardware flush the vm + * + * @rdev: radeon_device pointer + * @vm: vm we want to flush + * @ring: ring to use for flush + * @updates: last vm update that is waited for + * + * Flush the vm (cayman+). + * + * Global and local mutex must be locked! + */ +void radeon_vm_flush(struct radeon_device *rdev, + struct radeon_vm *vm, + int ring, struct radeon_fence *updates) +{ + uint64_t pd_addr = radeon_bo_gpu_offset(vm->page_directory); + struct radeon_vm_id *vm_id = &vm->ids[ring]; + + if (pd_addr != vm_id->pd_gpu_addr || !vm_id->flushed_updates || + radeon_fence_is_earlier(vm_id->flushed_updates, updates)) { + + trace_radeon_vm_flush(pd_addr, ring, vm->ids[ring].id); + radeon_fence_unref(&vm_id->flushed_updates); + vm_id->flushed_updates = radeon_fence_ref(updates); + vm_id->pd_gpu_addr = pd_addr; + radeon_ring_vm_flush(rdev, &rdev->ring[ring], + vm_id->id, vm_id->pd_gpu_addr); + + } +} + +/** + * 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) +{ + unsigned vm_id = vm->ids[fence->ring].id; + + radeon_fence_unref(&rdev->vm_manager.active[vm_id]); + rdev->vm_manager.active[vm_id] = radeon_fence_ref(fence); + + radeon_fence_unref(&vm->ids[fence->ring].last_id_use); + vm->ids[fence->ring].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->it.start = 0; + bo_va->it.last = 0; + bo_va->flags = 0; + bo_va->ref_count = 1; + INIT_LIST_HEAD(&bo_va->bo_list); + INIT_LIST_HEAD(&bo_va->vm_status); + + mutex_lock(&vm->mutex); + list_add_tail(&bo_va->bo_list, &bo->va); + mutex_unlock(&vm->mutex); + + return bo_va; +} + +/** + * radeon_vm_set_pages - helper to call the right asic function + * + * @rdev: radeon_device pointer + * @ib: indirect buffer to fill with commands + * @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 radeon_vm_set_pages(struct radeon_device *rdev, + struct radeon_ib *ib, + uint64_t pe, + uint64_t addr, unsigned count, + uint32_t incr, uint32_t flags) +{ + trace_radeon_vm_set_page(pe, addr, count, incr, flags); + + if ((flags & R600_PTE_GART_MASK) == R600_PTE_GART_MASK) { + uint64_t src = rdev->gart.table_addr + (addr >> 12) * 8; + radeon_asic_vm_copy_pages(rdev, ib, pe, src, count); + + } else if ((flags & R600_PTE_SYSTEM) || (count < 3)) { + radeon_asic_vm_write_pages(rdev, ib, pe, addr, + count, incr, flags); + + } else { + radeon_asic_vm_set_pages(rdev, ib, pe, addr, + count, incr, flags); + } +} + +/** + * radeon_vm_clear_bo - initially clear the page dir/table + * + * @rdev: radeon_device pointer + * @bo: bo to clear + */ +static int radeon_vm_clear_bo(struct radeon_device *rdev, + struct radeon_bo *bo) +{ + struct ttm_operation_ctx ctx = { true, false }; + struct radeon_ib ib; + unsigned entries; + uint64_t addr; + int r; + + r = radeon_bo_reserve(bo, false); + if (r) + return r; + + r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx); + if (r) + goto error_unreserve; + + addr = radeon_bo_gpu_offset(bo); + entries = radeon_bo_size(bo) / 8; + + r = radeon_ib_get(rdev, R600_RING_TYPE_DMA_INDEX, &ib, NULL, 256); + if (r) + goto error_unreserve; + + ib.length_dw = 0; + + radeon_vm_set_pages(rdev, &ib, addr, 0, entries, 0, 0); + radeon_asic_vm_pad_ib(rdev, &ib); + WARN_ON(ib.length_dw > 64); + + r = radeon_ib_schedule(rdev, &ib, NULL, false); + if (r) + goto error_free; + + ib.fence->is_vm_update = true; + radeon_bo_fence(bo, ib.fence, false); + +error_free: + radeon_ib_free(rdev, &ib); + +error_unreserve: + radeon_bo_unreserve(bo); + return r; +} + +/** + * 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 and gets unreserved by this function! + */ +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); + struct radeon_vm *vm = bo_va->vm; + unsigned last_pfn, pt_idx; + uint64_t eoffset; + int r; + + if (soffset) { + /* make sure object fit at this offset */ + eoffset = soffset + size - 1; + if (soffset >= eoffset) { + r = -EINVAL; + goto error_unreserve; + } + + 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); + r = -EINVAL; + goto error_unreserve; + } + + } else { + eoffset = last_pfn = 0; + } + + mutex_lock(&vm->mutex); + soffset /= RADEON_GPU_PAGE_SIZE; + eoffset /= RADEON_GPU_PAGE_SIZE; + if (soffset || eoffset) { + struct interval_tree_node *it; + it = interval_tree_iter_first(&vm->va, soffset, eoffset); + if (it && it != &bo_va->it) { + struct radeon_bo_va *tmp; + tmp = container_of(it, struct radeon_bo_va, it); + /* bo and tmp overlap, invalid offset */ + dev_err(rdev->dev, "bo %p va 0x%010Lx conflict with " + "(bo %p 0x%010lx 0x%010lx)\n", bo_va->bo, + soffset, tmp->bo, tmp->it.start, tmp->it.last); + mutex_unlock(&vm->mutex); + r = -EINVAL; + goto error_unreserve; + } + } + + if (bo_va->it.start || bo_va->it.last) { + /* add a clone of the bo_va to clear the old address */ + struct radeon_bo_va *tmp; + tmp = kzalloc(sizeof(struct radeon_bo_va), GFP_KERNEL); + if (!tmp) { + mutex_unlock(&vm->mutex); + r = -ENOMEM; + goto error_unreserve; + } + tmp->it.start = bo_va->it.start; + tmp->it.last = bo_va->it.last; + tmp->vm = vm; + tmp->bo = radeon_bo_ref(bo_va->bo); + + interval_tree_remove(&bo_va->it, &vm->va); + spin_lock(&vm->status_lock); + bo_va->it.start = 0; + bo_va->it.last = 0; + list_del_init(&bo_va->vm_status); + list_add(&tmp->vm_status, &vm->freed); + spin_unlock(&vm->status_lock); + } + + if (soffset || eoffset) { + spin_lock(&vm->status_lock); + bo_va->it.start = soffset; + bo_va->it.last = eoffset; + list_add(&bo_va->vm_status, &vm->cleared); + spin_unlock(&vm->status_lock); + interval_tree_insert(&bo_va->it, &vm->va); + } + + bo_va->flags = flags; + + soffset >>= radeon_vm_block_size; + eoffset >>= radeon_vm_block_size; + + BUG_ON(eoffset >= radeon_vm_num_pdes(rdev)); + + if (eoffset > vm->max_pde_used) + vm->max_pde_used = eoffset; + + radeon_bo_unreserve(bo_va->bo); + + /* walk over the address space and allocate the page tables */ + for (pt_idx = soffset; pt_idx <= eoffset; ++pt_idx) { + struct radeon_bo *pt; + + if (vm->page_tables[pt_idx].bo) + continue; + + /* drop mutex to allocate and clear page table */ + mutex_unlock(&vm->mutex); + + r = radeon_bo_create(rdev, RADEON_VM_PTE_COUNT * 8, + RADEON_GPU_PAGE_SIZE, true, + RADEON_GEM_DOMAIN_VRAM, 0, + NULL, NULL, &pt); + if (r) + return r; + + r = radeon_vm_clear_bo(rdev, pt); + if (r) { + radeon_bo_unref(&pt); + return r; + } + + /* aquire mutex again */ + mutex_lock(&vm->mutex); + if (vm->page_tables[pt_idx].bo) { + /* someone else allocated the pt in the meantime */ + mutex_unlock(&vm->mutex); + radeon_bo_unref(&pt); + mutex_lock(&vm->mutex); + continue; + } + + vm->page_tables[pt_idx].addr = 0; + vm->page_tables[pt_idx].bo = pt; + } + + mutex_unlock(&vm->mutex); + return 0; + +error_unreserve: + radeon_bo_unreserve(bo_va->bo); + return r; +} + +/** + * 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_entry[addr >> RADEON_GPU_PAGE_SHIFT]; + result &= ~RADEON_GPU_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! + */ +int radeon_vm_update_page_directory(struct radeon_device *rdev, + struct radeon_vm *vm) +{ + struct radeon_bo *pd = vm->page_directory; + uint64_t pd_addr = radeon_bo_gpu_offset(pd); + uint32_t incr = RADEON_VM_PTE_COUNT * 8; + uint64_t last_pde = ~0, last_pt = ~0; + unsigned count = 0, pt_idx, ndw; + struct radeon_ib ib; + int r; + + /* padding, etc. */ + ndw = 64; + + /* assume the worst case */ + ndw += vm->max_pde_used * 6; + + /* 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; + + /* walk over the address space and update the page directory */ + for (pt_idx = 0; pt_idx <= vm->max_pde_used; ++pt_idx) { + struct radeon_bo *bo = vm->page_tables[pt_idx].bo; + uint64_t pde, pt; + + if (bo == NULL) + continue; + + pt = radeon_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) { + radeon_vm_set_pages(rdev, &ib, last_pde, + last_pt, count, incr, + R600_PTE_VALID); + } + + count = 1; + last_pde = pde; + last_pt = pt; + } else { + ++count; + } + } + + if (count) + radeon_vm_set_pages(rdev, &ib, last_pde, last_pt, count, + incr, R600_PTE_VALID); + + if (ib.length_dw != 0) { + radeon_asic_vm_pad_ib(rdev, &ib); + + radeon_sync_resv(rdev, &ib.sync, pd->tbo.resv, true); + WARN_ON(ib.length_dw > ndw); + r = radeon_ib_schedule(rdev, &ib, NULL, false); + if (r) { + radeon_ib_free(rdev, &ib); + return r; + } + ib.fence->is_vm_update = true; + radeon_bo_fence(pd, ib.fence, false); + } + radeon_ib_free(rdev, &ib); + + return 0; +} + +/** + * radeon_vm_frag_ptes - add fragment information to PTEs + * + * @rdev: radeon_device pointer + * @ib: IB for the update + * @pe_start: first PTE to handle + * @pe_end: last PTE to handle + * @addr: addr those PTEs should point to + * @flags: hw mapping flags + * + * Global and local mutex must be locked! + */ +static void radeon_vm_frag_ptes(struct radeon_device *rdev, + struct radeon_ib *ib, + 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. + */ + + /* NI is optimized for 256KB fragments, SI and newer for 64KB */ + uint64_t frag_flags = ((rdev->family == CHIP_CAYMAN) || + (rdev->family == CHIP_ARUBA)) ? + R600_PTE_FRAG_256KB : R600_PTE_FRAG_64KB; + uint64_t frag_align = ((rdev->family == CHIP_CAYMAN) || + (rdev->family == CHIP_ARUBA)) ? 0x200 : 0x80; + + uint64_t frag_start = ALIGN(pe_start, frag_align); + uint64_t frag_end = pe_end & ~(frag_align - 1); + + unsigned count; + + /* system pages are non continuously */ + if ((flags & R600_PTE_SYSTEM) || !(flags & R600_PTE_VALID) || + (frag_start >= frag_end)) { + + count = (pe_end - pe_start) / 8; + radeon_vm_set_pages(rdev, ib, pe_start, addr, count, + RADEON_GPU_PAGE_SIZE, flags); + return; + } + + /* handle the 4K area at the beginning */ + if (pe_start != frag_start) { + count = (frag_start - pe_start) / 8; + radeon_vm_set_pages(rdev, ib, pe_start, addr, count, + RADEON_GPU_PAGE_SIZE, flags); + addr += RADEON_GPU_PAGE_SIZE * count; + } + + /* handle the area in the middle */ + count = (frag_end - frag_start) / 8; + radeon_vm_set_pages(rdev, ib, frag_start, addr, count, + RADEON_GPU_PAGE_SIZE, flags | frag_flags); + + /* handle the 4K area at the end */ + if (frag_end != pe_end) { + addr += RADEON_GPU_PAGE_SIZE * count; + count = (pe_end - frag_end) / 8; + radeon_vm_set_pages(rdev, ib, frag_end, addr, count, + RADEON_GPU_PAGE_SIZE, flags); + } +} + +/** + * 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 int 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) +{ + uint64_t mask = RADEON_VM_PTE_COUNT - 1; + uint64_t last_pte = ~0, last_dst = ~0; + unsigned count = 0; + uint64_t addr; + + /* walk over the address space and update the page tables */ + for (addr = start; addr < end; ) { + uint64_t pt_idx = addr >> radeon_vm_block_size; + struct radeon_bo *pt = vm->page_tables[pt_idx].bo; + unsigned nptes; + uint64_t pte; + int r; + + radeon_sync_resv(rdev, &ib->sync, pt->tbo.resv, true); + r = reservation_object_reserve_shared(pt->tbo.resv); + if (r) + return r; + + if ((addr & ~mask) == (end & ~mask)) + nptes = end - addr; + else + nptes = RADEON_VM_PTE_COUNT - (addr & mask); + + pte = radeon_bo_gpu_offset(pt); + pte += (addr & mask) * 8; + + if ((last_pte + 8 * count) != pte) { + + if (count) { + radeon_vm_frag_ptes(rdev, ib, last_pte, + last_pte + 8 * count, + last_dst, flags); + } + + count = nptes; + last_pte = pte; + last_dst = dst; + } else { + count += nptes; + } + + addr += nptes; + dst += nptes * RADEON_GPU_PAGE_SIZE; + } + + if (count) { + radeon_vm_frag_ptes(rdev, ib, last_pte, + last_pte + 8 * count, + last_dst, flags); + } + + return 0; +} + +/** + * radeon_vm_fence_pts - fence page tables after an update + * + * @vm: requested vm + * @start: start of GPU address range + * @end: end of GPU address range + * @fence: fence to use + * + * Fence the page tables in the range @start - @end (cayman+). + * + * Global and local mutex must be locked! + */ +static void radeon_vm_fence_pts(struct radeon_vm *vm, + uint64_t start, uint64_t end, + struct radeon_fence *fence) +{ + unsigned i; + + start >>= radeon_vm_block_size; + end = (end - 1) >> radeon_vm_block_size; + + for (i = start; i <= end; ++i) + radeon_bo_fence(vm->page_tables[i].bo, fence, true); +} + +/** + * 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 and mutex must be locked! + */ +int radeon_vm_bo_update(struct radeon_device *rdev, + struct radeon_bo_va *bo_va, + struct ttm_mem_reg *mem) +{ + struct radeon_vm *vm = bo_va->vm; + struct radeon_ib ib; + unsigned nptes, ncmds, ndw; + uint64_t addr; + uint32_t flags; + int r; + + if (!bo_va->it.start) { + dev_err(rdev->dev, "bo %p don't has a mapping in vm %p\n", + bo_va->bo, vm); + return -EINVAL; + } + + spin_lock(&vm->status_lock); + if (mem) { + if (list_empty(&bo_va->vm_status)) { + spin_unlock(&vm->status_lock); + return 0; + } + list_del_init(&bo_va->vm_status); + } else { + list_del(&bo_va->vm_status); + list_add(&bo_va->vm_status, &vm->cleared); + } + spin_unlock(&vm->status_lock); + + bo_va->flags &= ~RADEON_VM_PAGE_VALID; + bo_va->flags &= ~RADEON_VM_PAGE_SYSTEM; + bo_va->flags &= ~RADEON_VM_PAGE_SNOOPED; + if (bo_va->bo && radeon_ttm_tt_is_readonly(bo_va->bo->tbo.ttm)) + bo_va->flags &= ~RADEON_VM_PAGE_WRITEABLE; + + if (mem) { + addr = mem->start << PAGE_SHIFT; + if (mem->mem_type != TTM_PL_SYSTEM) { + bo_va->flags |= RADEON_VM_PAGE_VALID; + } + if (mem->mem_type == TTM_PL_TT) { + bo_va->flags |= RADEON_VM_PAGE_SYSTEM; + if (!(bo_va->bo->flags & (RADEON_GEM_GTT_WC | RADEON_GEM_GTT_UC))) + bo_va->flags |= RADEON_VM_PAGE_SNOOPED; + + } else { + addr += rdev->vm_manager.vram_base_offset; + } + } else { + addr = 0; + } + + trace_radeon_vm_bo_update(bo_va); + + nptes = bo_va->it.last - bo_va->it.start + 1; + + /* reserve space for one command every (1 << BLOCK_SIZE) entries + or 2k dwords (whatever is smaller) */ + ncmds = (nptes >> min(radeon_vm_block_size, 11)) + 1; + + /* padding, etc. */ + ndw = 64; + + flags = radeon_vm_page_flags(bo_va->flags); + if ((flags & R600_PTE_GART_MASK) == R600_PTE_GART_MASK) { + /* only copy commands needed */ + ndw += ncmds * 7; + + } else if (flags & R600_PTE_SYSTEM) { + /* 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; + } + + /* 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; + + if (!(bo_va->flags & RADEON_VM_PAGE_VALID)) { + unsigned i; + + for (i = 0; i < RADEON_NUM_RINGS; ++i) + radeon_sync_fence(&ib.sync, vm->ids[i].last_id_use); + } + + r = radeon_vm_update_ptes(rdev, vm, &ib, bo_va->it.start, + bo_va->it.last + 1, addr, + radeon_vm_page_flags(bo_va->flags)); + if (r) { + radeon_ib_free(rdev, &ib); + return r; + } + + radeon_asic_vm_pad_ib(rdev, &ib); + WARN_ON(ib.length_dw > ndw); + + r = radeon_ib_schedule(rdev, &ib, NULL, false); + if (r) { + radeon_ib_free(rdev, &ib); + return r; + } + ib.fence->is_vm_update = true; + radeon_vm_fence_pts(vm, bo_va->it.start, bo_va->it.last + 1, ib.fence); + radeon_fence_unref(&bo_va->last_pt_update); + bo_va->last_pt_update = radeon_fence_ref(ib.fence); + radeon_ib_free(rdev, &ib); + + return 0; +} + +/** + * radeon_vm_clear_freed - clear freed BOs in the PT + * + * @rdev: radeon_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 radeon_vm_clear_freed(struct radeon_device *rdev, + struct radeon_vm *vm) +{ + struct radeon_bo_va *bo_va; + int r = 0; + + spin_lock(&vm->status_lock); + while (!list_empty(&vm->freed)) { + bo_va = list_first_entry(&vm->freed, + struct radeon_bo_va, vm_status); + spin_unlock(&vm->status_lock); + + r = radeon_vm_bo_update(rdev, bo_va, NULL); + radeon_bo_unref(&bo_va->bo); + radeon_fence_unref(&bo_va->last_pt_update); + spin_lock(&vm->status_lock); + list_del(&bo_va->vm_status); + kfree(bo_va); + if (r) + break; + + } + spin_unlock(&vm->status_lock); + return r; + +} + +/** + * radeon_vm_clear_invalids - clear invalidated BOs in the PT + * + * @rdev: radeon_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 radeon_vm_clear_invalids(struct radeon_device *rdev, + struct radeon_vm *vm) +{ + struct radeon_bo_va *bo_va; + int r; + + spin_lock(&vm->status_lock); + while (!list_empty(&vm->invalidated)) { + bo_va = list_first_entry(&vm->invalidated, + struct radeon_bo_va, vm_status); + spin_unlock(&vm->status_lock); + + r = radeon_vm_bo_update(rdev, bo_va, NULL); + if (r) + return r; + + spin_lock(&vm->status_lock); + } + spin_unlock(&vm->status_lock); + + 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+). + * + * Object have to be reserved! + */ +void radeon_vm_bo_rmv(struct radeon_device *rdev, + struct radeon_bo_va *bo_va) +{ + struct radeon_vm *vm = bo_va->vm; + + list_del(&bo_va->bo_list); + + mutex_lock(&vm->mutex); + if (bo_va->it.start || bo_va->it.last) + interval_tree_remove(&bo_va->it, &vm->va); + + spin_lock(&vm->status_lock); + list_del(&bo_va->vm_status); + if (bo_va->it.start || bo_va->it.last) { + bo_va->bo = radeon_bo_ref(bo_va->bo); + list_add(&bo_va->vm_status, &vm->freed); + } else { + radeon_fence_unref(&bo_va->last_pt_update); + kfree(bo_va); + } + spin_unlock(&vm->status_lock); + + mutex_unlock(&vm->mutex); +} + +/** + * 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) { + spin_lock(&bo_va->vm->status_lock); + if (list_empty(&bo_va->vm_status) && + (bo_va->it.start || bo_va->it.last)) + list_add(&bo_va->vm_status, &bo_va->vm->invalidated); + spin_unlock(&bo_va->vm->status_lock); + } +} + +/** + * radeon_vm_init - initialize a vm instance + * + * @rdev: radeon_device pointer + * @vm: requested vm + * + * Init @vm fields (cayman+). + */ +int radeon_vm_init(struct radeon_device *rdev, struct radeon_vm *vm) +{ + const unsigned align = min(RADEON_VM_PTB_ALIGN_SIZE, + RADEON_VM_PTE_COUNT * 8); + unsigned pd_size, pd_entries, pts_size; + int i, r; + + vm->ib_bo_va = NULL; + for (i = 0; i < RADEON_NUM_RINGS; ++i) { + vm->ids[i].id = 0; + vm->ids[i].flushed_updates = NULL; + vm->ids[i].last_id_use = NULL; + } + mutex_init(&vm->mutex); + vm->va = RB_ROOT_CACHED; + spin_lock_init(&vm->status_lock); + INIT_LIST_HEAD(&vm->invalidated); + INIT_LIST_HEAD(&vm->freed); + INIT_LIST_HEAD(&vm->cleared); + + pd_size = radeon_vm_directory_size(rdev); + pd_entries = radeon_vm_num_pdes(rdev); + + /* allocate page table array */ + pts_size = pd_entries * sizeof(struct radeon_vm_pt); + vm->page_tables = kzalloc(pts_size, GFP_KERNEL); + if (vm->page_tables == NULL) { + DRM_ERROR("Cannot allocate memory for page table array\n"); + return -ENOMEM; + } + + r = radeon_bo_create(rdev, pd_size, align, true, + RADEON_GEM_DOMAIN_VRAM, 0, NULL, + NULL, &vm->page_directory); + if (r) + return r; + + r = radeon_vm_clear_bo(rdev, vm->page_directory); + if (r) { + radeon_bo_unref(&vm->page_directory); + vm->page_directory = NULL; + return r; + } + + return 0; +} + +/** + * 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 i, r; + + if (!RB_EMPTY_ROOT(&vm->va.rb_root)) { + dev_err(rdev->dev, "still active bo inside vm\n"); + } + rbtree_postorder_for_each_entry_safe(bo_va, tmp, + &vm->va.rb_root, it.rb) { + interval_tree_remove(&bo_va->it, &vm->va); + r = radeon_bo_reserve(bo_va->bo, false); + if (!r) { + list_del_init(&bo_va->bo_list); + radeon_bo_unreserve(bo_va->bo); + radeon_fence_unref(&bo_va->last_pt_update); + kfree(bo_va); + } + } + list_for_each_entry_safe(bo_va, tmp, &vm->freed, vm_status) { + radeon_bo_unref(&bo_va->bo); + radeon_fence_unref(&bo_va->last_pt_update); + kfree(bo_va); + } + + for (i = 0; i < radeon_vm_num_pdes(rdev); i++) + radeon_bo_unref(&vm->page_tables[i].bo); + kfree(vm->page_tables); + + radeon_bo_unref(&vm->page_directory); + + for (i = 0; i < RADEON_NUM_RINGS; ++i) { + radeon_fence_unref(&vm->ids[i].flushed_updates); + radeon_fence_unref(&vm->ids[i].last_id_use); + } + + mutex_destroy(&vm->mutex); +} |