[PATCH 1/5] drm/radeon: separate gart and vm functions (original) (raw)

Christian König deathsimple at vodafone.de
Mon Feb 24 09:42:39 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> Reviewed-by: Alex Deucher <alexander.deucher at amd.com>

drivers/gpu/drm/radeon/Makefile | 2 +- drivers/gpu/drm/radeon/radeon_gart.c | 958 ---------------------------------- drivers/gpu/drm/radeon/radeon_vm.c | 981 +++++++++++++++++++++++++++++++++++ 3 files changed, 982 insertions(+), 959 deletions(-) create mode 100644 drivers/gpu/drm/radeon/radeon_vm.c

diff --git a/drivers/gpu/drm/radeon/Makefile b/drivers/gpu/drm/radeon/Makefile index ed60caa..0943353 100644 --- a/drivers/gpu/drm/radeon/Makefile +++ b/drivers/gpu/drm/radeon/Makefile @@ -80,7 +80,7 @@ radeon-y += radeon_device.o radeon_asic.o radeon_kms.o
r600_dpm.o rs780_dpm.o rv6xx_dpm.o rv770_dpm.o rv730_dpm.o rv740_dpm.o
rv770_smc.o cypress_dpm.o btc_dpm.o sumo_dpm.o sumo_smc.o trinity_dpm.o
trinity_smc.o ni_dpm.o si_smc.o si_dpm.o kv_smc.o kv_dpm.o ci_smc.o
- ci_dpm.o dce6_afmt.o + ci_dpm.o dce6_afmt.o radeon_vm.o # add async DMA block radeon-y +=
diff --git a/drivers/gpu/drm/radeon/radeon_gart.c b/drivers/gpu/drm/radeon/radeon_gart.c index a8f9b46..2e72365 100644 --- a/drivers/gpu/drm/radeon/radeon_gart.c +++ b/drivers/gpu/drm/radeon/radeon_gart.c @@ -28,8 +28,6 @@ #include <drm/drmP.h> #include <drm/radeon_drm.h> #include "radeon.h" -#include "radeon_reg.h" -#include "radeon_trace.h" /* * GART @@ -394,959 +392,3 @@ void radeon_gart_fini(struct radeon_device *rdev) radeon_dummy_page_fini(rdev); }

-/* - * GPUVM - * GPUVM is similar to the legacy gart on older asics, however - * rather than there being a single global gart table - * for the entire GPU, there are multiple VM page tables active - * at any given time. The VM page tables can contain a mix - * vram pages and system memory pages and system memory pages - * can be mapped as snooped (cached system pages) or unsnooped - * (uncached system pages). - * Each VM has an ID associated with it and there is a page table - * associated with each VMID. When execting a command buffer, - * the kernel tells the the ring what VMID to use for that command - * buffer. VMIDs are allocated dynamically as commands are submitted. - * The userspace drivers maintain their own address space and the kernel - * sets up their pages tables accordingly when they submit their - * command buffers and a VMID is assigned. - * Cayman/Trinity support up to 8 active VMs at any given time; - * SI supports 16. - */

-/* - * vm helpers - * - * TODO bind a default page at vm initialization for default address - */

-/** - * radeon_vm_num_pde - return the number of page directory entries - * - * @rdev: radeon_device pointer - * - * Calculate the number of page directory entries (cayman+). - */ -static unsigned radeon_vm_num_pdes(struct radeon_device *rdev) -{ - return rdev->vm_manager.max_pfn >> RADEON_VM_BLOCK_SIZE; -}

-/** - * radeon_vm_directory_size - returns the size of the page directory in bytes - * - * @rdev: radeon_device pointer - * - * Calculate the size of the page directory in bytes (cayman+). - */ -static unsigned radeon_vm_directory_size(struct radeon_device *rdev) -{ - return RADEON_GPU_PAGE_ALIGN(radeon_vm_num_pdes(rdev) * 8); -}

-/** - * radeon_vm_manager_init - init the vm manager - * - * @rdev: radeon_device pointer - * - * Init the vm manager (cayman+). - * Returns 0 for success, error for failure. - */ -int radeon_vm_manager_init(struct radeon_device *rdev) -{ - struct radeon_vm *vm; - struct radeon_bo_va *bo_va; - int r; - unsigned size;

-{ - struct radeon_bo_va *bo_va; - int i;

-{ - struct radeon_fence *best[RADEON_NUM_RINGS] = {}; - unsigned choices[2] = {}; - unsigned i;

-{ - radeon_fence_unref(&rdev->vm_manager.active[vm->id]); - rdev->vm_manager.active[vm->id] = radeon_fence_ref(fence);

-{ - struct radeon_bo_va *bo_va;

-{ - struct radeon_bo_va *bo_va;

-{ - 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;

-}

-/** - * 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;

-{ - static const uint64_t mask = RADEON_VM_PTE_COUNT - 1;

-{ - struct radeon_ib ib; - struct radeon_bo_va *bo_va; - unsigned nptes, npdes, ndw; - uint64_t addr; - int r;

-{ - int r = 0;

-{ - struct radeon_bo_va *bo_va;

+{ + 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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