diff options
Diffstat (limited to 'drivers/gpu/drm/ttm/ttm_bo_util.c')
| -rw-r--r-- | drivers/gpu/drm/ttm/ttm_bo_util.c | 702 |
1 files changed, 702 insertions, 0 deletions
diff --git a/drivers/gpu/drm/ttm/ttm_bo_util.c b/drivers/gpu/drm/ttm/ttm_bo_util.c new file mode 100644 index 0000000..af89458 --- /dev/null +++ b/drivers/gpu/drm/ttm/ttm_bo_util.c @@ -0,0 +1,702 @@ +/************************************************************************** + * + * Copyright (c) 2007-2009 VMware, Inc., Palo Alto, CA., USA + * All Rights Reserved. + * + * 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, sub license, 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 (including the + * next paragraph) 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 NON-INFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS 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: Thomas Hellstrom <thellstrom-at-vmware-dot-com> + */ + +#include <drm/ttm/ttm_bo_driver.h> +#include <drm/ttm/ttm_placement.h> +#include <linux/io.h> +#include <linux/highmem.h> +#include <linux/wait.h> +#include <linux/slab.h> +#include <linux/vmalloc.h> +#include <linux/module.h> + +void ttm_bo_free_old_node(struct ttm_buffer_object *bo) +{ + ttm_bo_mem_put(bo, &bo->mem); +} + +int ttm_bo_move_ttm(struct ttm_buffer_object *bo, + bool evict, + bool no_wait_gpu, struct ttm_mem_reg *new_mem) +{ + struct ttm_tt *ttm = bo->ttm; + struct ttm_mem_reg *old_mem = &bo->mem; + int ret; + + if (old_mem->mem_type != TTM_PL_SYSTEM) { + ttm_tt_unbind(ttm); + ttm_bo_free_old_node(bo); + ttm_flag_masked(&old_mem->placement, TTM_PL_FLAG_SYSTEM, + TTM_PL_MASK_MEM); + old_mem->mem_type = TTM_PL_SYSTEM; + } + + ret = ttm_tt_set_placement_caching(ttm, new_mem->placement); + if (unlikely(ret != 0)) + return ret; + + if (new_mem->mem_type != TTM_PL_SYSTEM) { + ret = ttm_tt_bind(ttm, new_mem); + if (unlikely(ret != 0)) + return ret; + } + + *old_mem = *new_mem; + new_mem->mm_node = NULL; + + return 0; +} +EXPORT_SYMBOL(ttm_bo_move_ttm); + +int ttm_mem_io_lock(struct ttm_mem_type_manager *man, bool interruptible) +{ + if (likely(man->io_reserve_fastpath)) + return 0; + + if (interruptible) + return mutex_lock_interruptible(&man->io_reserve_mutex); + + mutex_lock(&man->io_reserve_mutex); + return 0; +} +EXPORT_SYMBOL(ttm_mem_io_lock); + +void ttm_mem_io_unlock(struct ttm_mem_type_manager *man) +{ + if (likely(man->io_reserve_fastpath)) + return; + + mutex_unlock(&man->io_reserve_mutex); +} +EXPORT_SYMBOL(ttm_mem_io_unlock); + +static int ttm_mem_io_evict(struct ttm_mem_type_manager *man) +{ + struct ttm_buffer_object *bo; + + if (!man->use_io_reserve_lru || list_empty(&man->io_reserve_lru)) + return -EAGAIN; + + bo = list_first_entry(&man->io_reserve_lru, + struct ttm_buffer_object, + io_reserve_lru); + list_del_init(&bo->io_reserve_lru); + ttm_bo_unmap_virtual_locked(bo); + + return 0; +} + + +int ttm_mem_io_reserve(struct ttm_bo_device *bdev, + struct ttm_mem_reg *mem) +{ + struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type]; + int ret = 0; + + if (!bdev->driver->io_mem_reserve) + return 0; + if (likely(man->io_reserve_fastpath)) + return bdev->driver->io_mem_reserve(bdev, mem); + + if (bdev->driver->io_mem_reserve && + mem->bus.io_reserved_count++ == 0) { +retry: + ret = bdev->driver->io_mem_reserve(bdev, mem); + if (ret == -EAGAIN) { + ret = ttm_mem_io_evict(man); + if (ret == 0) + goto retry; + } + } + return ret; +} +EXPORT_SYMBOL(ttm_mem_io_reserve); + +void ttm_mem_io_free(struct ttm_bo_device *bdev, + struct ttm_mem_reg *mem) +{ + struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type]; + + if (likely(man->io_reserve_fastpath)) + return; + + if (bdev->driver->io_mem_reserve && + --mem->bus.io_reserved_count == 0 && + bdev->driver->io_mem_free) + bdev->driver->io_mem_free(bdev, mem); + +} +EXPORT_SYMBOL(ttm_mem_io_free); + +int ttm_mem_io_reserve_vm(struct ttm_buffer_object *bo) +{ + struct ttm_mem_reg *mem = &bo->mem; + int ret; + + if (!mem->bus.io_reserved_vm) { + struct ttm_mem_type_manager *man = + &bo->bdev->man[mem->mem_type]; + + ret = ttm_mem_io_reserve(bo->bdev, mem); + if (unlikely(ret != 0)) + return ret; + mem->bus.io_reserved_vm = true; + if (man->use_io_reserve_lru) + list_add_tail(&bo->io_reserve_lru, + &man->io_reserve_lru); + } + return 0; +} + +void ttm_mem_io_free_vm(struct ttm_buffer_object *bo) +{ + struct ttm_mem_reg *mem = &bo->mem; + + if (mem->bus.io_reserved_vm) { + mem->bus.io_reserved_vm = false; + list_del_init(&bo->io_reserve_lru); + ttm_mem_io_free(bo->bdev, mem); + } +} + +int ttm_mem_reg_ioremap(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem, + void **virtual) +{ + struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type]; + int ret; + void *addr; + + *virtual = NULL; + (void) ttm_mem_io_lock(man, false); + ret = ttm_mem_io_reserve(bdev, mem); + ttm_mem_io_unlock(man); + if (ret || !mem->bus.is_iomem) + return ret; + + if (mem->bus.addr) { + addr = mem->bus.addr; + } else { + if (mem->placement & TTM_PL_FLAG_WC) + addr = ioremap_wc(mem->bus.base + mem->bus.offset, mem->bus.size); + else + addr = ioremap_nocache(mem->bus.base + mem->bus.offset, mem->bus.size); + if (!addr) { + (void) ttm_mem_io_lock(man, false); + ttm_mem_io_free(bdev, mem); + ttm_mem_io_unlock(man); + return -ENOMEM; + } + } + *virtual = addr; + return 0; +} + +void ttm_mem_reg_iounmap(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem, + void *virtual) +{ + struct ttm_mem_type_manager *man; + + man = &bdev->man[mem->mem_type]; + + if (virtual && mem->bus.addr == NULL) + iounmap(virtual); + (void) ttm_mem_io_lock(man, false); + ttm_mem_io_free(bdev, mem); + ttm_mem_io_unlock(man); +} + +static int ttm_copy_io_page(void *dst, void *src, unsigned long page) +{ + uint32_t *dstP = + (uint32_t *) ((unsigned long)dst + (page << PAGE_SHIFT)); + uint32_t *srcP = + (uint32_t *) ((unsigned long)src + (page << PAGE_SHIFT)); + + int i; + for (i = 0; i < PAGE_SIZE / sizeof(uint32_t); ++i) + iowrite32(ioread32(srcP++), dstP++); + return 0; +} + +static int ttm_copy_io_ttm_page(struct ttm_tt *ttm, void *src, + unsigned long page, + pgprot_t prot) +{ + struct page *d = ttm->pages[page]; + void *dst; + + if (!d) + return -ENOMEM; + + src = (void *)((unsigned long)src + (page << PAGE_SHIFT)); + +#ifdef CONFIG_X86 + dst = kmap_atomic_prot(d, prot); +#else + if (pgprot_val(prot) != pgprot_val(PAGE_KERNEL)) + dst = vmap(&d, 1, 0, prot); + else + dst = kmap(d); +#endif + if (!dst) + return -ENOMEM; + + memcpy_fromio(dst, src, PAGE_SIZE); + +#ifdef CONFIG_X86 + kunmap_atomic(dst); +#else + if (pgprot_val(prot) != pgprot_val(PAGE_KERNEL)) + vunmap(dst); + else + kunmap(d); +#endif + + return 0; +} + +static int ttm_copy_ttm_io_page(struct ttm_tt *ttm, void *dst, + unsigned long page, + pgprot_t prot) +{ + struct page *s = ttm->pages[page]; + void *src; + + if (!s) + return -ENOMEM; + + dst = (void *)((unsigned long)dst + (page << PAGE_SHIFT)); +#ifdef CONFIG_X86 + src = kmap_atomic_prot(s, prot); +#else + if (pgprot_val(prot) != pgprot_val(PAGE_KERNEL)) + src = vmap(&s, 1, 0, prot); + else + src = kmap(s); +#endif + if (!src) + return -ENOMEM; + + memcpy_toio(dst, src, PAGE_SIZE); + +#ifdef CONFIG_X86 + kunmap_atomic(src); +#else + if (pgprot_val(prot) != pgprot_val(PAGE_KERNEL)) + vunmap(src); + else + kunmap(s); +#endif + + return 0; +} + +int ttm_bo_move_memcpy(struct ttm_buffer_object *bo, + bool evict, bool no_wait_gpu, + struct ttm_mem_reg *new_mem) +{ + struct ttm_bo_device *bdev = bo->bdev; + struct ttm_mem_type_manager *man = &bdev->man[new_mem->mem_type]; + struct ttm_tt *ttm = bo->ttm; + struct ttm_mem_reg *old_mem = &bo->mem; + struct ttm_mem_reg old_copy = *old_mem; + void *old_iomap; + void *new_iomap; + int ret; + unsigned long i; + unsigned long page; + unsigned long add = 0; + int dir; + + ret = ttm_mem_reg_ioremap(bdev, old_mem, &old_iomap); + if (ret) + return ret; + ret = ttm_mem_reg_ioremap(bdev, new_mem, &new_iomap); + if (ret) + goto out; + + if (old_iomap == NULL && new_iomap == NULL) + goto out2; + if (old_iomap == NULL && ttm == NULL) + goto out2; + + if (ttm->state == tt_unpopulated) { + ret = ttm->bdev->driver->ttm_tt_populate(ttm); + if (ret) { + /* if we fail here don't nuke the mm node + * as the bo still owns it */ + old_copy.mm_node = NULL; + goto out1; + } + } + + add = 0; + dir = 1; + + if ((old_mem->mem_type == new_mem->mem_type) && + (new_mem->start < old_mem->start + old_mem->size)) { + dir = -1; + add = new_mem->num_pages - 1; + } + + for (i = 0; i < new_mem->num_pages; ++i) { + page = i * dir + add; + if (old_iomap == NULL) { + pgprot_t prot = ttm_io_prot(old_mem->placement, + PAGE_KERNEL); + ret = ttm_copy_ttm_io_page(ttm, new_iomap, page, + prot); + } else if (new_iomap == NULL) { + pgprot_t prot = ttm_io_prot(new_mem->placement, + PAGE_KERNEL); + ret = ttm_copy_io_ttm_page(ttm, old_iomap, page, + prot); + } else + ret = ttm_copy_io_page(new_iomap, old_iomap, page); + if (ret) { + /* failing here, means keep old copy as-is */ + old_copy.mm_node = NULL; + goto out1; + } + } + mb(); +out2: + old_copy = *old_mem; + *old_mem = *new_mem; + new_mem->mm_node = NULL; + + if ((man->flags & TTM_MEMTYPE_FLAG_FIXED) && (ttm != NULL)) { + ttm_tt_unbind(ttm); + ttm_tt_destroy(ttm); + bo->ttm = NULL; + } + +out1: + ttm_mem_reg_iounmap(bdev, old_mem, new_iomap); +out: + ttm_mem_reg_iounmap(bdev, &old_copy, old_iomap); + ttm_bo_mem_put(bo, &old_copy); + return ret; +} +EXPORT_SYMBOL(ttm_bo_move_memcpy); + +static void ttm_transfered_destroy(struct ttm_buffer_object *bo) +{ + kfree(bo); +} + +/** + * ttm_buffer_object_transfer + * + * @bo: A pointer to a struct ttm_buffer_object. + * @new_obj: A pointer to a pointer to a newly created ttm_buffer_object, + * holding the data of @bo with the old placement. + * + * This is a utility function that may be called after an accelerated move + * has been scheduled. A new buffer object is created as a placeholder for + * the old data while it's being copied. When that buffer object is idle, + * it can be destroyed, releasing the space of the old placement. + * Returns: + * !0: Failure. + */ + +static int ttm_buffer_object_transfer(struct ttm_buffer_object *bo, + struct ttm_buffer_object **new_obj) +{ + struct ttm_buffer_object *fbo; + struct ttm_bo_device *bdev = bo->bdev; + struct ttm_bo_driver *driver = bdev->driver; + + fbo = kmalloc(sizeof(*fbo), GFP_KERNEL); + if (!fbo) + return -ENOMEM; + + *fbo = *bo; + + /** + * Fix up members that we shouldn't copy directly: + * TODO: Explicit member copy would probably be better here. + */ + + init_waitqueue_head(&fbo->event_queue); + INIT_LIST_HEAD(&fbo->ddestroy); + INIT_LIST_HEAD(&fbo->lru); + INIT_LIST_HEAD(&fbo->swap); + INIT_LIST_HEAD(&fbo->io_reserve_lru); + fbo->vm_node = NULL; + atomic_set(&fbo->cpu_writers, 0); + + spin_lock(&bdev->fence_lock); + if (bo->sync_obj) + fbo->sync_obj = driver->sync_obj_ref(bo->sync_obj); + else + fbo->sync_obj = NULL; + spin_unlock(&bdev->fence_lock); + kref_init(&fbo->list_kref); + kref_init(&fbo->kref); + fbo->destroy = &ttm_transfered_destroy; + fbo->acc_size = 0; + + *new_obj = fbo; + return 0; +} + +pgprot_t ttm_io_prot(uint32_t caching_flags, pgprot_t tmp) +{ +#if defined(__i386__) || defined(__x86_64__) + if (caching_flags & TTM_PL_FLAG_WC) + tmp = pgprot_writecombine(tmp); + else if (boot_cpu_data.x86 > 3) + tmp = pgprot_noncached(tmp); + +#elif defined(__powerpc__) + if (!(caching_flags & TTM_PL_FLAG_CACHED)) { + pgprot_val(tmp) |= _PAGE_NO_CACHE; + if (caching_flags & TTM_PL_FLAG_UNCACHED) + pgprot_val(tmp) |= _PAGE_GUARDED; + } +#endif +#if defined(__ia64__) + if (caching_flags & TTM_PL_FLAG_WC) + tmp = pgprot_writecombine(tmp); + else + tmp = pgprot_noncached(tmp); +#endif +#if defined(__sparc__) || defined(__mips__) + if (!(caching_flags & TTM_PL_FLAG_CACHED)) + tmp = pgprot_noncached(tmp); +#endif + return tmp; +} +EXPORT_SYMBOL(ttm_io_prot); + +static int ttm_bo_ioremap(struct ttm_buffer_object *bo, + unsigned long offset, + unsigned long size, + struct ttm_bo_kmap_obj *map) +{ + struct ttm_mem_reg *mem = &bo->mem; + + if (bo->mem.bus.addr) { + map->bo_kmap_type = ttm_bo_map_premapped; + map->virtual = (void *)(((u8 *)bo->mem.bus.addr) + offset); + } else { + map->bo_kmap_type = ttm_bo_map_iomap; + if (mem->placement & TTM_PL_FLAG_WC) + map->virtual = ioremap_wc(bo->mem.bus.base + bo->mem.bus.offset + offset, + size); + else + map->virtual = ioremap_nocache(bo->mem.bus.base + bo->mem.bus.offset + offset, + size); + } + return (!map->virtual) ? -ENOMEM : 0; +} + +static int ttm_bo_kmap_ttm(struct ttm_buffer_object *bo, + unsigned long start_page, + unsigned long num_pages, + struct ttm_bo_kmap_obj *map) +{ + struct ttm_mem_reg *mem = &bo->mem; pgprot_t prot; + struct ttm_tt *ttm = bo->ttm; + int ret; + + BUG_ON(!ttm); + + if (ttm->state == tt_unpopulated) { + ret = ttm->bdev->driver->ttm_tt_populate(ttm); + if (ret) + return ret; + } + + if (num_pages == 1 && (mem->placement & TTM_PL_FLAG_CACHED)) { + /* + * We're mapping a single page, and the desired + * page protection is consistent with the bo. + */ + + map->bo_kmap_type = ttm_bo_map_kmap; + map->page = ttm->pages[start_page]; + map->virtual = kmap(map->page); + } else { + /* + * We need to use vmap to get the desired page protection + * or to make the buffer object look contiguous. + */ + prot = (mem->placement & TTM_PL_FLAG_CACHED) ? + PAGE_KERNEL : + ttm_io_prot(mem->placement, PAGE_KERNEL); + map->bo_kmap_type = ttm_bo_map_vmap; + map->virtual = vmap(ttm->pages + start_page, num_pages, + 0, prot); + } + return (!map->virtual) ? -ENOMEM : 0; +} + +int ttm_bo_kmap(struct ttm_buffer_object *bo, + unsigned long start_page, unsigned long num_pages, + struct ttm_bo_kmap_obj *map) +{ + struct ttm_mem_type_manager *man = + &bo->bdev->man[bo->mem.mem_type]; + unsigned long offset, size; + int ret; + + BUG_ON(!list_empty(&bo->swap)); + map->virtual = NULL; + map->bo = bo; + if (num_pages > bo->num_pages) + return -EINVAL; + if (start_page > bo->num_pages) + return -EINVAL; +#if 0 + if (num_pages > 1 && !DRM_SUSER(DRM_CURPROC)) + return -EPERM; +#endif + (void) ttm_mem_io_lock(man, false); + ret = ttm_mem_io_reserve(bo->bdev, &bo->mem); + ttm_mem_io_unlock(man); + if (ret) + return ret; + if (!bo->mem.bus.is_iomem) { + return ttm_bo_kmap_ttm(bo, start_page, num_pages, map); + } else { + offset = start_page << PAGE_SHIFT; + size = num_pages << PAGE_SHIFT; + return ttm_bo_ioremap(bo, offset, size, map); + } +} +EXPORT_SYMBOL(ttm_bo_kmap); + +void ttm_bo_kunmap(struct ttm_bo_kmap_obj *map) +{ + struct ttm_buffer_object *bo = map->bo; + struct ttm_mem_type_manager *man = + &bo->bdev->man[bo->mem.mem_type]; + + if (!map->virtual) + return; + switch (map->bo_kmap_type) { + case ttm_bo_map_iomap: + iounmap(map->virtual); + break; + case ttm_bo_map_vmap: + vunmap(map->virtual); + break; + case ttm_bo_map_kmap: + kunmap(map->page); + break; + case ttm_bo_map_premapped: + break; + default: + BUG(); + } + (void) ttm_mem_io_lock(man, false); + ttm_mem_io_free(map->bo->bdev, &map->bo->mem); + ttm_mem_io_unlock(man); + map->virtual = NULL; + map->page = NULL; +} +EXPORT_SYMBOL(ttm_bo_kunmap); + +int ttm_bo_move_accel_cleanup(struct ttm_buffer_object *bo, + void *sync_obj, + bool evict, + bool no_wait_gpu, + struct ttm_mem_reg *new_mem) +{ + struct ttm_bo_device *bdev = bo->bdev; + struct ttm_bo_driver *driver = bdev->driver; + struct ttm_mem_type_manager *man = &bdev->man[new_mem->mem_type]; + struct ttm_mem_reg *old_mem = &bo->mem; + int ret; + struct ttm_buffer_object *ghost_obj; + void *tmp_obj = NULL; + + spin_lock(&bdev->fence_lock); + if (bo->sync_obj) { + tmp_obj = bo->sync_obj; + bo->sync_obj = NULL; + } + bo->sync_obj = driver->sync_obj_ref(sync_obj); + if (evict) { + ret = ttm_bo_wait(bo, false, false, false); + spin_unlock(&bdev->fence_lock); + if (tmp_obj) + driver->sync_obj_unref(&tmp_obj); + if (ret) + return ret; + + if ((man->flags & TTM_MEMTYPE_FLAG_FIXED) && + (bo->ttm != NULL)) { + ttm_tt_unbind(bo->ttm); + ttm_tt_destroy(bo->ttm); + bo->ttm = NULL; + } + ttm_bo_free_old_node(bo); + } else { + /** + * This should help pipeline ordinary buffer moves. + * + * Hang old buffer memory on a new buffer object, + * and leave it to be released when the GPU + * operation has completed. + */ + + set_bit(TTM_BO_PRIV_FLAG_MOVING, &bo->priv_flags); + spin_unlock(&bdev->fence_lock); + if (tmp_obj) + driver->sync_obj_unref(&tmp_obj); + + ret = ttm_buffer_object_transfer(bo, &ghost_obj); + if (ret) + return ret; + + /** + * If we're not moving to fixed memory, the TTM object + * needs to stay alive. Otherwhise hang it on the ghost + * bo to be unbound and destroyed. + */ + + if (!(man->flags & TTM_MEMTYPE_FLAG_FIXED)) + ghost_obj->ttm = NULL; + else + bo->ttm = NULL; + + ttm_bo_unreserve(ghost_obj); + ttm_bo_unref(&ghost_obj); + } + + *old_mem = *new_mem; + new_mem->mm_node = NULL; + + return 0; +} +EXPORT_SYMBOL(ttm_bo_move_accel_cleanup); |