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author | codeworkx <daniel.hillenbrand@codeworkx.de> | 2012-06-02 13:09:29 +0200 |
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committer | codeworkx <daniel.hillenbrand@codeworkx.de> | 2012-06-02 13:09:29 +0200 |
commit | c6da2cfeb05178a11c6d062a06f8078150ee492f (patch) | |
tree | f3b4021d252c52d6463a9b3c1bb7245e399b009c /drivers/gpu/drm/i915/i915_gem.c | |
parent | c6d7c4dbff353eac7919342ae6b3299a378160a6 (diff) | |
download | kernel_samsung_smdk4412-c6da2cfeb05178a11c6d062a06f8078150ee492f.zip kernel_samsung_smdk4412-c6da2cfeb05178a11c6d062a06f8078150ee492f.tar.gz kernel_samsung_smdk4412-c6da2cfeb05178a11c6d062a06f8078150ee492f.tar.bz2 |
samsung update 1
Diffstat (limited to 'drivers/gpu/drm/i915/i915_gem.c')
-rw-r--r-- | drivers/gpu/drm/i915/i915_gem.c | 848 |
1 files changed, 476 insertions, 372 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 5548593..1f441f5 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -58,6 +58,7 @@ static void i915_gem_free_object_tail(struct drm_i915_gem_object *obj); static int i915_gem_inactive_shrink(struct shrinker *shrinker, struct shrink_control *sc); +static void i915_gem_object_truncate(struct drm_i915_gem_object *obj); /* some bookkeeping */ static void i915_gem_info_add_obj(struct drm_i915_private *dev_priv, @@ -179,7 +180,7 @@ i915_gem_get_aperture_ioctl(struct drm_device *dev, void *data, mutex_unlock(&dev->struct_mutex); args->aper_size = dev_priv->mm.gtt_total; - args->aper_available_size = args->aper_size -pinned; + args->aper_available_size = args->aper_size - pinned; return 0; } @@ -195,6 +196,8 @@ i915_gem_create(struct drm_file *file, u32 handle; size = roundup(size, PAGE_SIZE); + if (size == 0) + return -EINVAL; /* Allocate the new object */ obj = i915_gem_alloc_object(dev, size); @@ -256,73 +259,6 @@ static int i915_gem_object_needs_bit17_swizzle(struct drm_i915_gem_object *obj) obj->tiling_mode != I915_TILING_NONE; } -static inline void -slow_shmem_copy(struct page *dst_page, - int dst_offset, - struct page *src_page, - int src_offset, - int length) -{ - char *dst_vaddr, *src_vaddr; - - dst_vaddr = kmap(dst_page); - src_vaddr = kmap(src_page); - - memcpy(dst_vaddr + dst_offset, src_vaddr + src_offset, length); - - kunmap(src_page); - kunmap(dst_page); -} - -static inline void -slow_shmem_bit17_copy(struct page *gpu_page, - int gpu_offset, - struct page *cpu_page, - int cpu_offset, - int length, - int is_read) -{ - char *gpu_vaddr, *cpu_vaddr; - - /* Use the unswizzled path if this page isn't affected. */ - if ((page_to_phys(gpu_page) & (1 << 17)) == 0) { - if (is_read) - return slow_shmem_copy(cpu_page, cpu_offset, - gpu_page, gpu_offset, length); - else - return slow_shmem_copy(gpu_page, gpu_offset, - cpu_page, cpu_offset, length); - } - - gpu_vaddr = kmap(gpu_page); - cpu_vaddr = kmap(cpu_page); - - /* Copy the data, XORing A6 with A17 (1). The user already knows he's - * XORing with the other bits (A9 for Y, A9 and A10 for X) - */ - while (length > 0) { - int cacheline_end = ALIGN(gpu_offset + 1, 64); - int this_length = min(cacheline_end - gpu_offset, length); - int swizzled_gpu_offset = gpu_offset ^ 64; - - if (is_read) { - memcpy(cpu_vaddr + cpu_offset, - gpu_vaddr + swizzled_gpu_offset, - this_length); - } else { - memcpy(gpu_vaddr + swizzled_gpu_offset, - cpu_vaddr + cpu_offset, - this_length); - } - cpu_offset += this_length; - gpu_offset += this_length; - length -= this_length; - } - - kunmap(cpu_page); - kunmap(gpu_page); -} - /** * This is the fast shmem pread path, which attempts to copy_from_user directly * from the backing pages of the object to the user's address space. On a @@ -383,6 +319,58 @@ i915_gem_shmem_pread_fast(struct drm_device *dev, return 0; } +static inline int +__copy_to_user_swizzled(char __user *cpu_vaddr, + const char *gpu_vaddr, int gpu_offset, + int length) +{ + int ret, cpu_offset = 0; + + while (length > 0) { + int cacheline_end = ALIGN(gpu_offset + 1, 64); + int this_length = min(cacheline_end - gpu_offset, length); + int swizzled_gpu_offset = gpu_offset ^ 64; + + ret = __copy_to_user(cpu_vaddr + cpu_offset, + gpu_vaddr + swizzled_gpu_offset, + this_length); + if (ret) + return ret + length; + + cpu_offset += this_length; + gpu_offset += this_length; + length -= this_length; + } + + return 0; +} + +static inline int +__copy_from_user_swizzled(char __user *gpu_vaddr, int gpu_offset, + const char *cpu_vaddr, + int length) +{ + int ret, cpu_offset = 0; + + while (length > 0) { + int cacheline_end = ALIGN(gpu_offset + 1, 64); + int this_length = min(cacheline_end - gpu_offset, length); + int swizzled_gpu_offset = gpu_offset ^ 64; + + ret = __copy_from_user(gpu_vaddr + swizzled_gpu_offset, + cpu_vaddr + cpu_offset, + this_length); + if (ret) + return ret + length; + + cpu_offset += this_length; + gpu_offset += this_length; + length -= this_length; + } + + return 0; +} + /** * This is the fallback shmem pread path, which allocates temporary storage * in kernel space to copy_to_user into outside of the struct_mutex, so we @@ -396,72 +384,34 @@ i915_gem_shmem_pread_slow(struct drm_device *dev, struct drm_file *file) { struct address_space *mapping = obj->base.filp->f_path.dentry->d_inode->i_mapping; - struct mm_struct *mm = current->mm; - struct page **user_pages; + char __user *user_data; ssize_t remain; - loff_t offset, pinned_pages, i; - loff_t first_data_page, last_data_page, num_pages; - int shmem_page_offset; - int data_page_index, data_page_offset; - int page_length; - int ret; - uint64_t data_ptr = args->data_ptr; - int do_bit17_swizzling; + loff_t offset; + int shmem_page_offset, page_length, ret; + int obj_do_bit17_swizzling, page_do_bit17_swizzling; + user_data = (char __user *) (uintptr_t) args->data_ptr; remain = args->size; - /* Pin the user pages containing the data. We can't fault while - * holding the struct mutex, yet we want to hold it while - * dereferencing the user data. - */ - first_data_page = data_ptr / PAGE_SIZE; - last_data_page = (data_ptr + args->size - 1) / PAGE_SIZE; - num_pages = last_data_page - first_data_page + 1; + obj_do_bit17_swizzling = i915_gem_object_needs_bit17_swizzle(obj); - user_pages = drm_malloc_ab(num_pages, sizeof(struct page *)); - if (user_pages == NULL) - return -ENOMEM; + offset = args->offset; mutex_unlock(&dev->struct_mutex); - down_read(&mm->mmap_sem); - pinned_pages = get_user_pages(current, mm, (uintptr_t)args->data_ptr, - num_pages, 1, 0, user_pages, NULL); - up_read(&mm->mmap_sem); - mutex_lock(&dev->struct_mutex); - if (pinned_pages < num_pages) { - ret = -EFAULT; - goto out; - } - - ret = i915_gem_object_set_cpu_read_domain_range(obj, - args->offset, - args->size); - if (ret) - goto out; - - do_bit17_swizzling = i915_gem_object_needs_bit17_swizzle(obj); - - offset = args->offset; while (remain > 0) { struct page *page; + char *vaddr; /* Operation in this page * * shmem_page_offset = offset within page in shmem file - * data_page_index = page number in get_user_pages return - * data_page_offset = offset with data_page_index page. * page_length = bytes to copy for this page */ shmem_page_offset = offset_in_page(offset); - data_page_index = data_ptr / PAGE_SIZE - first_data_page; - data_page_offset = offset_in_page(data_ptr); - page_length = remain; if ((shmem_page_offset + page_length) > PAGE_SIZE) page_length = PAGE_SIZE - shmem_page_offset; - if ((data_page_offset + page_length) > PAGE_SIZE) - page_length = PAGE_SIZE - data_page_offset; page = shmem_read_mapping_page(mapping, offset >> PAGE_SHIFT); if (IS_ERR(page)) { @@ -469,36 +419,38 @@ i915_gem_shmem_pread_slow(struct drm_device *dev, goto out; } - if (do_bit17_swizzling) { - slow_shmem_bit17_copy(page, - shmem_page_offset, - user_pages[data_page_index], - data_page_offset, - page_length, - 1); - } else { - slow_shmem_copy(user_pages[data_page_index], - data_page_offset, - page, - shmem_page_offset, - page_length); - } + page_do_bit17_swizzling = obj_do_bit17_swizzling && + (page_to_phys(page) & (1 << 17)) != 0; + + vaddr = kmap(page); + if (page_do_bit17_swizzling) + ret = __copy_to_user_swizzled(user_data, + vaddr, shmem_page_offset, + page_length); + else + ret = __copy_to_user(user_data, + vaddr + shmem_page_offset, + page_length); + kunmap(page); mark_page_accessed(page); page_cache_release(page); + if (ret) { + ret = -EFAULT; + goto out; + } + remain -= page_length; - data_ptr += page_length; + user_data += page_length; offset += page_length; } out: - for (i = 0; i < pinned_pages; i++) { - SetPageDirty(user_pages[i]); - mark_page_accessed(user_pages[i]); - page_cache_release(user_pages[i]); - } - drm_free_large(user_pages); + mutex_lock(&dev->struct_mutex); + /* Fixup: Kill any reinstated backing storage pages */ + if (obj->madv == __I915_MADV_PURGED) + i915_gem_object_truncate(obj); return ret; } @@ -800,11 +752,11 @@ i915_gem_shmem_pwrite_fast(struct drm_device *dev, if (IS_ERR(page)) return PTR_ERR(page); - vaddr = kmap_atomic(page, KM_USER0); + vaddr = kmap_atomic(page); ret = __copy_from_user_inatomic(vaddr + page_offset, user_data, page_length); - kunmap_atomic(vaddr, KM_USER0); + kunmap_atomic(vaddr); set_page_dirty(page); mark_page_accessed(page); @@ -839,71 +791,36 @@ i915_gem_shmem_pwrite_slow(struct drm_device *dev, struct drm_file *file) { struct address_space *mapping = obj->base.filp->f_path.dentry->d_inode->i_mapping; - struct mm_struct *mm = current->mm; - struct page **user_pages; ssize_t remain; - loff_t offset, pinned_pages, i; - loff_t first_data_page, last_data_page, num_pages; - int shmem_page_offset; - int data_page_index, data_page_offset; - int page_length; - int ret; - uint64_t data_ptr = args->data_ptr; - int do_bit17_swizzling; + loff_t offset; + char __user *user_data; + int shmem_page_offset, page_length, ret; + int obj_do_bit17_swizzling, page_do_bit17_swizzling; + user_data = (char __user *) (uintptr_t) args->data_ptr; remain = args->size; - /* Pin the user pages containing the data. We can't fault while - * holding the struct mutex, and all of the pwrite implementations - * want to hold it while dereferencing the user data. - */ - first_data_page = data_ptr / PAGE_SIZE; - last_data_page = (data_ptr + args->size - 1) / PAGE_SIZE; - num_pages = last_data_page - first_data_page + 1; - - user_pages = drm_malloc_ab(num_pages, sizeof(struct page *)); - if (user_pages == NULL) - return -ENOMEM; - - mutex_unlock(&dev->struct_mutex); - down_read(&mm->mmap_sem); - pinned_pages = get_user_pages(current, mm, (uintptr_t)args->data_ptr, - num_pages, 0, 0, user_pages, NULL); - up_read(&mm->mmap_sem); - mutex_lock(&dev->struct_mutex); - if (pinned_pages < num_pages) { - ret = -EFAULT; - goto out; - } - - ret = i915_gem_object_set_to_cpu_domain(obj, 1); - if (ret) - goto out; - - do_bit17_swizzling = i915_gem_object_needs_bit17_swizzle(obj); + obj_do_bit17_swizzling = i915_gem_object_needs_bit17_swizzle(obj); offset = args->offset; obj->dirty = 1; + mutex_unlock(&dev->struct_mutex); + while (remain > 0) { struct page *page; + char *vaddr; /* Operation in this page * * shmem_page_offset = offset within page in shmem file - * data_page_index = page number in get_user_pages return - * data_page_offset = offset with data_page_index page. * page_length = bytes to copy for this page */ shmem_page_offset = offset_in_page(offset); - data_page_index = data_ptr / PAGE_SIZE - first_data_page; - data_page_offset = offset_in_page(data_ptr); page_length = remain; if ((shmem_page_offset + page_length) > PAGE_SIZE) page_length = PAGE_SIZE - shmem_page_offset; - if ((data_page_offset + page_length) > PAGE_SIZE) - page_length = PAGE_SIZE - data_page_offset; page = shmem_read_mapping_page(mapping, offset >> PAGE_SHIFT); if (IS_ERR(page)) { @@ -911,34 +828,45 @@ i915_gem_shmem_pwrite_slow(struct drm_device *dev, goto out; } - if (do_bit17_swizzling) { - slow_shmem_bit17_copy(page, - shmem_page_offset, - user_pages[data_page_index], - data_page_offset, - page_length, - 0); - } else { - slow_shmem_copy(page, - shmem_page_offset, - user_pages[data_page_index], - data_page_offset, - page_length); - } + page_do_bit17_swizzling = obj_do_bit17_swizzling && + (page_to_phys(page) & (1 << 17)) != 0; + + vaddr = kmap(page); + if (page_do_bit17_swizzling) + ret = __copy_from_user_swizzled(vaddr, shmem_page_offset, + user_data, + page_length); + else + ret = __copy_from_user(vaddr + shmem_page_offset, + user_data, + page_length); + kunmap(page); set_page_dirty(page); mark_page_accessed(page); page_cache_release(page); + if (ret) { + ret = -EFAULT; + goto out; + } + remain -= page_length; - data_ptr += page_length; + user_data += page_length; offset += page_length; } out: - for (i = 0; i < pinned_pages; i++) - page_cache_release(user_pages[i]); - drm_free_large(user_pages); + mutex_lock(&dev->struct_mutex); + /* Fixup: Kill any reinstated backing storage pages */ + if (obj->madv == __I915_MADV_PURGED) + i915_gem_object_truncate(obj); + /* and flush dirty cachelines in case the object isn't in the cpu write + * domain anymore. */ + if (obj->base.write_domain != I915_GEM_DOMAIN_CPU) { + i915_gem_clflush_object(obj); + intel_gtt_chipset_flush(); + } return ret; } @@ -994,10 +922,13 @@ i915_gem_pwrite_ioctl(struct drm_device *dev, void *data, * pread/pwrite currently are reading and writing from the CPU * perspective, requiring manual detiling by the client. */ - if (obj->phys_obj) + if (obj->phys_obj) { ret = i915_gem_phys_pwrite(dev, obj, args, file); - else if (obj->gtt_space && - obj->base.write_domain != I915_GEM_DOMAIN_CPU) { + goto out; + } + + if (obj->gtt_space && + obj->base.write_domain != I915_GEM_DOMAIN_CPU) { ret = i915_gem_object_pin(obj, 0, true); if (ret) goto out; @@ -1016,18 +947,24 @@ i915_gem_pwrite_ioctl(struct drm_device *dev, void *data, out_unpin: i915_gem_object_unpin(obj); - } else { - ret = i915_gem_object_set_to_cpu_domain(obj, 1); - if (ret) - goto out; - ret = -EFAULT; - if (!i915_gem_object_needs_bit17_swizzle(obj)) - ret = i915_gem_shmem_pwrite_fast(dev, obj, args, file); - if (ret == -EFAULT) - ret = i915_gem_shmem_pwrite_slow(dev, obj, args, file); + if (ret != -EFAULT) + goto out; + /* Fall through to the shmfs paths because the gtt paths might + * fail with non-page-backed user pointers (e.g. gtt mappings + * when moving data between textures). */ } + ret = i915_gem_object_set_to_cpu_domain(obj, 1); + if (ret) + goto out; + + ret = -EFAULT; + if (!i915_gem_object_needs_bit17_swizzle(obj)) + ret = i915_gem_shmem_pwrite_fast(dev, obj, args, file); + if (ret == -EFAULT) + ret = i915_gem_shmem_pwrite_slow(dev, obj, args, file); + out: drm_gem_object_unreference(&obj->base); unlock: @@ -1139,7 +1076,6 @@ int i915_gem_mmap_ioctl(struct drm_device *dev, void *data, struct drm_file *file) { - struct drm_i915_private *dev_priv = dev->dev_private; struct drm_i915_gem_mmap *args = data; struct drm_gem_object *obj; unsigned long addr; @@ -1151,11 +1087,6 @@ i915_gem_mmap_ioctl(struct drm_device *dev, void *data, if (obj == NULL) return -ENOENT; - if (obj->size > dev_priv->mm.gtt_mappable_end) { - drm_gem_object_unreference_unlocked(obj); - return -E2BIG; - } - down_write(¤t->mm->mmap_sem); addr = do_mmap(obj->filp, 0, args->size, PROT_READ | PROT_WRITE, MAP_SHARED, @@ -1265,74 +1196,6 @@ out: } /** - * i915_gem_create_mmap_offset - create a fake mmap offset for an object - * @obj: obj in question - * - * GEM memory mapping works by handing back to userspace a fake mmap offset - * it can use in a subsequent mmap(2) call. The DRM core code then looks - * up the object based on the offset and sets up the various memory mapping - * structures. - * - * This routine allocates and attaches a fake offset for @obj. - */ -static int -i915_gem_create_mmap_offset(struct drm_i915_gem_object *obj) -{ - struct drm_device *dev = obj->base.dev; - struct drm_gem_mm *mm = dev->mm_private; - struct drm_map_list *list; - struct drm_local_map *map; - int ret = 0; - - /* Set the object up for mmap'ing */ - list = &obj->base.map_list; - list->map = kzalloc(sizeof(struct drm_map_list), GFP_KERNEL); - if (!list->map) - return -ENOMEM; - - map = list->map; - map->type = _DRM_GEM; - map->size = obj->base.size; - map->handle = obj; - - /* Get a DRM GEM mmap offset allocated... */ - list->file_offset_node = drm_mm_search_free(&mm->offset_manager, - obj->base.size / PAGE_SIZE, - 0, 0); - if (!list->file_offset_node) { - DRM_ERROR("failed to allocate offset for bo %d\n", - obj->base.name); - ret = -ENOSPC; - goto out_free_list; - } - - list->file_offset_node = drm_mm_get_block(list->file_offset_node, - obj->base.size / PAGE_SIZE, - 0); - if (!list->file_offset_node) { - ret = -ENOMEM; - goto out_free_list; - } - - list->hash.key = list->file_offset_node->start; - ret = drm_ht_insert_item(&mm->offset_hash, &list->hash); - if (ret) { - DRM_ERROR("failed to add to map hash\n"); - goto out_free_mm; - } - - return 0; - -out_free_mm: - drm_mm_put_block(list->file_offset_node); -out_free_list: - kfree(list->map); - list->map = NULL; - - return ret; -} - -/** * i915_gem_release_mmap - remove physical page mappings * @obj: obj in question * @@ -1360,19 +1223,6 @@ i915_gem_release_mmap(struct drm_i915_gem_object *obj) obj->fault_mappable = false; } -static void -i915_gem_free_mmap_offset(struct drm_i915_gem_object *obj) -{ - struct drm_device *dev = obj->base.dev; - struct drm_gem_mm *mm = dev->mm_private; - struct drm_map_list *list = &obj->base.map_list; - - drm_ht_remove_item(&mm->offset_hash, &list->hash); - drm_mm_put_block(list->file_offset_node); - kfree(list->map); - list->map = NULL; -} - static uint32_t i915_gem_get_gtt_size(struct drm_device *dev, uint32_t size, int tiling_mode) { @@ -1485,7 +1335,7 @@ i915_gem_mmap_gtt(struct drm_file *file, } if (!obj->base.map_list.map) { - ret = i915_gem_create_mmap_offset(obj); + ret = drm_gem_create_mmap_offset(&obj->base); if (ret) goto out; } @@ -1557,7 +1407,7 @@ i915_gem_object_get_pages_gtt(struct drm_i915_gem_object *obj, obj->pages[i] = page; } - if (obj->tiling_mode != I915_TILING_NONE) + if (i915_gem_object_needs_bit17_swizzle(obj)) i915_gem_object_do_bit_17_swizzle(obj); return 0; @@ -1579,7 +1429,7 @@ i915_gem_object_put_pages_gtt(struct drm_i915_gem_object *obj) BUG_ON(obj->madv == __I915_MADV_PURGED); - if (obj->tiling_mode != I915_TILING_NONE) + if (i915_gem_object_needs_bit17_swizzle(obj)) i915_gem_object_save_bit_17_swizzle(obj); if (obj->madv == I915_MADV_DONTNEED) @@ -1726,6 +1576,28 @@ i915_gem_process_flushing_list(struct intel_ring_buffer *ring, } } +static u32 +i915_gem_get_seqno(struct drm_device *dev) +{ + drm_i915_private_t *dev_priv = dev->dev_private; + u32 seqno = dev_priv->next_seqno; + + /* reserve 0 for non-seqno */ + if (++dev_priv->next_seqno == 0) + dev_priv->next_seqno = 1; + + return seqno; +} + +u32 +i915_gem_next_request_seqno(struct intel_ring_buffer *ring) +{ + if (ring->outstanding_lazy_request == 0) + ring->outstanding_lazy_request = i915_gem_get_seqno(ring->dev); + + return ring->outstanding_lazy_request; +} + int i915_add_request(struct intel_ring_buffer *ring, struct drm_file *file, @@ -1733,10 +1605,19 @@ i915_add_request(struct intel_ring_buffer *ring, { drm_i915_private_t *dev_priv = ring->dev->dev_private; uint32_t seqno; + u32 request_ring_position; int was_empty; int ret; BUG_ON(request == NULL); + seqno = i915_gem_next_request_seqno(ring); + + /* Record the position of the start of the request so that + * should we detect the updated seqno part-way through the + * GPU processing the request, we never over-estimate the + * position of the head. + */ + request_ring_position = intel_ring_get_tail(ring); ret = ring->add_request(ring, &seqno); if (ret) @@ -1746,6 +1627,7 @@ i915_add_request(struct intel_ring_buffer *ring, request->seqno = seqno; request->ring = ring; + request->tail = request_ring_position; request->emitted_jiffies = jiffies; was_empty = list_empty(&ring->request_list); list_add_tail(&request->list, &ring->request_list); @@ -1760,11 +1642,14 @@ i915_add_request(struct intel_ring_buffer *ring, spin_unlock(&file_priv->mm.lock); } - ring->outstanding_lazy_request = false; + ring->outstanding_lazy_request = 0; if (!dev_priv->mm.suspended) { - mod_timer(&dev_priv->hangcheck_timer, - jiffies + msecs_to_jiffies(DRM_I915_HANGCHECK_PERIOD)); + if (i915_enable_hangcheck) { + mod_timer(&dev_priv->hangcheck_timer, + jiffies + + msecs_to_jiffies(DRM_I915_HANGCHECK_PERIOD)); + } if (was_empty) queue_delayed_work(dev_priv->wq, &dev_priv->mm.retire_work, HZ); @@ -1821,7 +1706,7 @@ static void i915_gem_reset_fences(struct drm_device *dev) struct drm_i915_private *dev_priv = dev->dev_private; int i; - for (i = 0; i < 16; i++) { + for (i = 0; i < dev_priv->num_fence_regs; i++) { struct drm_i915_fence_reg *reg = &dev_priv->fence_regs[i]; struct drm_i915_gem_object *obj = reg->obj; @@ -1853,7 +1738,7 @@ void i915_gem_reset(struct drm_device *dev) * lost bo to the inactive list. */ while (!list_empty(&dev_priv->mm.flushing_list)) { - obj= list_first_entry(&dev_priv->mm.flushing_list, + obj = list_first_entry(&dev_priv->mm.flushing_list, struct drm_i915_gem_object, mm_list); @@ -1879,7 +1764,7 @@ void i915_gem_reset(struct drm_device *dev) /** * This function clears the request list as sequence numbers are passed. */ -static void +void i915_gem_retire_requests_ring(struct intel_ring_buffer *ring) { uint32_t seqno; @@ -1907,6 +1792,12 @@ i915_gem_retire_requests_ring(struct intel_ring_buffer *ring) break; trace_i915_gem_request_retire(ring, request->seqno); + /* We know the GPU must have read the request to have + * sent us the seqno + interrupt, so use the position + * of tail of the request to update the last known position + * of the GPU head. + */ + ring->last_retired_head = request->tail; list_del(&request->list); i915_gem_request_remove_from_client(request); @@ -1919,7 +1810,7 @@ i915_gem_retire_requests_ring(struct intel_ring_buffer *ring) while (!list_empty(&ring->active_list)) { struct drm_i915_gem_object *obj; - obj= list_first_entry(&ring->active_list, + obj = list_first_entry(&ring->active_list, struct drm_i915_gem_object, ring_list); @@ -2019,7 +1910,8 @@ i915_gem_retire_work_handler(struct work_struct *work) */ int i915_wait_request(struct intel_ring_buffer *ring, - uint32_t seqno) + uint32_t seqno, + bool do_retire) { drm_i915_private_t *dev_priv = ring->dev->dev_private; u32 ier; @@ -2082,9 +1974,9 @@ i915_wait_request(struct intel_ring_buffer *ring, || atomic_read(&dev_priv->mm.wedged)); ring->irq_put(ring); - } else if (wait_for(i915_seqno_passed(ring->get_seqno(ring), - seqno) || - atomic_read(&dev_priv->mm.wedged), 3000)) + } else if (wait_for_atomic(i915_seqno_passed(ring->get_seqno(ring), + seqno) || + atomic_read(&dev_priv->mm.wedged), 3000)) ret = -EBUSY; ring->waiting_seqno = 0; @@ -2093,17 +1985,12 @@ i915_wait_request(struct intel_ring_buffer *ring, if (atomic_read(&dev_priv->mm.wedged)) ret = -EAGAIN; - if (ret && ret != -ERESTARTSYS) - DRM_ERROR("%s returns %d (awaiting %d at %d, next %d)\n", - __func__, ret, seqno, ring->get_seqno(ring), - dev_priv->next_seqno); - /* Directly dispatch request retiring. While we have the work queue * to handle this, the waiter on a request often wants an associated * buffer to have made it to the inactive list, and we would need * a separate wait queue to handle that. */ - if (ret == 0) + if (ret == 0 && do_retire) i915_gem_retire_requests_ring(ring); return ret; @@ -2127,7 +2014,8 @@ i915_gem_object_wait_rendering(struct drm_i915_gem_object *obj) * it. */ if (obj->active) { - ret = i915_wait_request(obj->ring, obj->last_rendering_seqno); + ret = i915_wait_request(obj->ring, obj->last_rendering_seqno, + true); if (ret) return ret; } @@ -2135,12 +2023,37 @@ i915_gem_object_wait_rendering(struct drm_i915_gem_object *obj) return 0; } +static void i915_gem_object_finish_gtt(struct drm_i915_gem_object *obj) +{ + u32 old_write_domain, old_read_domains; + + /* Act a barrier for all accesses through the GTT */ + mb(); + + /* Force a pagefault for domain tracking on next user access */ + i915_gem_release_mmap(obj); + + if ((obj->base.read_domains & I915_GEM_DOMAIN_GTT) == 0) + return; + + old_read_domains = obj->base.read_domains; + old_write_domain = obj->base.write_domain; + + obj->base.read_domains &= ~I915_GEM_DOMAIN_GTT; + obj->base.write_domain &= ~I915_GEM_DOMAIN_GTT; + + trace_i915_gem_object_change_domain(obj, + old_read_domains, + old_write_domain); +} + /** * Unbinds an object from the GTT aperture. */ int i915_gem_object_unbind(struct drm_i915_gem_object *obj) { + drm_i915_private_t *dev_priv = obj->base.dev->dev_private; int ret = 0; if (obj->gtt_space == NULL) @@ -2151,23 +2064,28 @@ i915_gem_object_unbind(struct drm_i915_gem_object *obj) return -EINVAL; } - /* blow away mappings if mapped through GTT */ - i915_gem_release_mmap(obj); - - /* Move the object to the CPU domain to ensure that - * any possible CPU writes while it's not in the GTT - * are flushed when we go to remap it. This will - * also ensure that all pending GPU writes are finished - * before we unbind. - */ - ret = i915_gem_object_set_to_cpu_domain(obj, 1); + ret = i915_gem_object_finish_gpu(obj); if (ret == -ERESTARTSYS) return ret; /* Continue on if we fail due to EIO, the GPU is hung so we * should be safe and we need to cleanup or else we might * cause memory corruption through use-after-free. */ + + i915_gem_object_finish_gtt(obj); + + /* Move the object to the CPU domain to ensure that + * any possible CPU writes while it's not in the GTT + * are flushed when we go to remap it. + */ + if (ret == 0) + ret = i915_gem_object_set_to_cpu_domain(obj, 1); + if (ret == -ERESTARTSYS) + return ret; if (ret) { + /* In the event of a disaster, abandon all caches and + * hope for the best. + */ i915_gem_clflush_object(obj); obj->base.read_domains = obj->base.write_domain = I915_GEM_DOMAIN_CPU; } @@ -2180,6 +2098,11 @@ i915_gem_object_unbind(struct drm_i915_gem_object *obj) trace_i915_gem_object_unbind(obj); i915_gem_gtt_unbind_object(obj); + if (obj->has_aliasing_ppgtt_mapping) { + i915_ppgtt_unbind_object(dev_priv->mm.aliasing_ppgtt, obj); + obj->has_aliasing_ppgtt_mapping = 0; + } + i915_gem_object_put_pages_gtt(obj); list_del_init(&obj->gtt_list); @@ -2219,7 +2142,7 @@ i915_gem_flush_ring(struct intel_ring_buffer *ring, return 0; } -static int i915_ring_idle(struct intel_ring_buffer *ring) +static int i915_ring_idle(struct intel_ring_buffer *ring, bool do_retire) { int ret; @@ -2233,24 +2156,18 @@ static int i915_ring_idle(struct intel_ring_buffer *ring) return ret; } - return i915_wait_request(ring, i915_gem_next_request_seqno(ring)); + return i915_wait_request(ring, i915_gem_next_request_seqno(ring), + do_retire); } -int -i915_gpu_idle(struct drm_device *dev) +int i915_gpu_idle(struct drm_device *dev, bool do_retire) { drm_i915_private_t *dev_priv = dev->dev_private; - bool lists_empty; int ret, i; - lists_empty = (list_empty(&dev_priv->mm.flushing_list) && - list_empty(&dev_priv->mm.active_list)); - if (lists_empty) - return 0; - /* Flush everything onto the inactive list. */ for (i = 0; i < I915_NUM_RINGS; i++) { - ret = i915_ring_idle(&dev_priv->ring[i]); + ret = i915_ring_idle(&dev_priv->ring[i], do_retire); if (ret) return ret; } @@ -2453,7 +2370,8 @@ i915_gem_object_flush_fence(struct drm_i915_gem_object *obj, if (!ring_passed_seqno(obj->last_fenced_ring, obj->last_fenced_seqno)) { ret = i915_wait_request(obj->last_fenced_ring, - obj->last_fenced_seqno); + obj->last_fenced_seqno, + true); if (ret) return ret; } @@ -2485,6 +2403,8 @@ i915_gem_object_put_fence(struct drm_i915_gem_object *obj) if (obj->fence_reg != I915_FENCE_REG_NONE) { struct drm_i915_private *dev_priv = obj->base.dev->dev_private; + + WARN_ON(dev_priv->fence_regs[obj->fence_reg].pin_count); i915_gem_clear_fence_reg(obj->base.dev, &dev_priv->fence_regs[obj->fence_reg]); @@ -2509,7 +2429,7 @@ i915_find_fence_reg(struct drm_device *dev, if (!reg->obj) return reg; - if (!reg->obj->pin_count) + if (!reg->pin_count) avail = reg; } @@ -2519,7 +2439,7 @@ i915_find_fence_reg(struct drm_device *dev, /* None available, try to steal one or wait for a user to finish */ avail = first = NULL; list_for_each_entry(reg, &dev_priv->mm.fence_list, lru_list) { - if (reg->obj->pin_count) + if (reg->pin_count) continue; if (first == NULL) @@ -2594,7 +2514,8 @@ i915_gem_object_get_fence(struct drm_i915_gem_object *obj, if (!ring_passed_seqno(obj->last_fenced_ring, reg->setup_seqno)) { ret = i915_wait_request(obj->last_fenced_ring, - reg->setup_seqno); + reg->setup_seqno, + true); if (ret) return ret; } @@ -2613,7 +2534,7 @@ i915_gem_object_get_fence(struct drm_i915_gem_object *obj, reg = i915_find_fence_reg(dev, pipelined); if (reg == NULL) - return -ENOSPC; + return -EDEADLK; ret = i915_gem_object_flush_fence(obj, pipelined); if (ret) @@ -2713,6 +2634,7 @@ i915_gem_clear_fence_reg(struct drm_device *dev, list_del_init(®->lru_list); reg->obj = NULL; reg->setup_seqno = 0; + reg->pin_count = 0; } /** @@ -2850,7 +2772,7 @@ i915_gem_object_bind_to_gtt(struct drm_i915_gem_object *obj, fenceable = obj->gtt_space->size == fence_size && - (obj->gtt_space->start & (fence_alignment -1)) == 0; + (obj->gtt_space->start & (fence_alignment - 1)) == 0; mappable = obj->gtt_offset + obj->base.size <= dev_priv->mm.gtt_mappable_end; @@ -2996,51 +2918,144 @@ i915_gem_object_set_to_gtt_domain(struct drm_i915_gem_object *obj, bool write) return 0; } +int i915_gem_object_set_cache_level(struct drm_i915_gem_object *obj, + enum i915_cache_level cache_level) +{ + struct drm_device *dev = obj->base.dev; + drm_i915_private_t *dev_priv = dev->dev_private; + int ret; + + if (obj->cache_level == cache_level) + return 0; + + if (obj->pin_count) { + DRM_DEBUG("can not change the cache level of pinned objects\n"); + return -EBUSY; + } + + if (obj->gtt_space) { + ret = i915_gem_object_finish_gpu(obj); + if (ret) + return ret; + + i915_gem_object_finish_gtt(obj); + + /* Before SandyBridge, you could not use tiling or fence + * registers with snooped memory, so relinquish any fences + * currently pointing to our region in the aperture. + */ + if (INTEL_INFO(obj->base.dev)->gen < 6) { + ret = i915_gem_object_put_fence(obj); + if (ret) + return ret; + } + + i915_gem_gtt_rebind_object(obj, cache_level); + if (obj->has_aliasing_ppgtt_mapping) + i915_ppgtt_bind_object(dev_priv->mm.aliasing_ppgtt, + obj, cache_level); + } + + if (cache_level == I915_CACHE_NONE) { + u32 old_read_domains, old_write_domain; + + /* If we're coming from LLC cached, then we haven't + * actually been tracking whether the data is in the + * CPU cache or not, since we only allow one bit set + * in obj->write_domain and have been skipping the clflushes. + * Just set it to the CPU cache for now. + */ + WARN_ON(obj->base.write_domain & ~I915_GEM_DOMAIN_CPU); + WARN_ON(obj->base.read_domains & ~I915_GEM_DOMAIN_CPU); + + old_read_domains = obj->base.read_domains; + old_write_domain = obj->base.write_domain; + + obj->base.read_domains = I915_GEM_DOMAIN_CPU; + obj->base.write_domain = I915_GEM_DOMAIN_CPU; + + trace_i915_gem_object_change_domain(obj, + old_read_domains, + old_write_domain); + } + + obj->cache_level = cache_level; + return 0; +} + /* - * Prepare buffer for display plane. Use uninterruptible for possible flush - * wait, as in modesetting process we're not supposed to be interrupted. + * Prepare buffer for display plane (scanout, cursors, etc). + * Can be called from an uninterruptible phase (modesetting) and allows + * any flushes to be pipelined (for pageflips). + * + * For the display plane, we want to be in the GTT but out of any write + * domains. So in many ways this looks like set_to_gtt_domain() apart from the + * ability to pipeline the waits, pinning and any additional subtleties + * that may differentiate the display plane from ordinary buffers. */ int -i915_gem_object_set_to_display_plane(struct drm_i915_gem_object *obj, +i915_gem_object_pin_to_display_plane(struct drm_i915_gem_object *obj, + u32 alignment, struct intel_ring_buffer *pipelined) { - uint32_t old_read_domains; + u32 old_read_domains, old_write_domain; int ret; - /* Not valid to be called on unbound objects. */ - if (obj->gtt_space == NULL) - return -EINVAL; - ret = i915_gem_object_flush_gpu_write_domain(obj); if (ret) return ret; - - /* Currently, we are always called from an non-interruptible context. */ if (pipelined != obj->ring) { ret = i915_gem_object_wait_rendering(obj); - if (ret) + if (ret == -ERESTARTSYS) return ret; } + /* The display engine is not coherent with the LLC cache on gen6. As + * a result, we make sure that the pinning that is about to occur is + * done with uncached PTEs. This is lowest common denominator for all + * chipsets. + * + * However for gen6+, we could do better by using the GFDT bit instead + * of uncaching, which would allow us to flush all the LLC-cached data + * with that bit in the PTE to main memory with just one PIPE_CONTROL. + */ + ret = i915_gem_object_set_cache_level(obj, I915_CACHE_NONE); + if (ret) + return ret; + + /* As the user may map the buffer once pinned in the display plane + * (e.g. libkms for the bootup splash), we have to ensure that we + * always use map_and_fenceable for all scanout buffers. + */ + ret = i915_gem_object_pin(obj, alignment, true); + if (ret) + return ret; + i915_gem_object_flush_cpu_write_domain(obj); + old_write_domain = obj->base.write_domain; old_read_domains = obj->base.read_domains; + + /* It should now be out of any other write domains, and we can update + * the domain values for our changes. + */ + BUG_ON((obj->base.write_domain & ~I915_GEM_DOMAIN_GTT) != 0); obj->base.read_domains |= I915_GEM_DOMAIN_GTT; trace_i915_gem_object_change_domain(obj, old_read_domains, - obj->base.write_domain); + old_write_domain); return 0; } int -i915_gem_object_flush_gpu(struct drm_i915_gem_object *obj) +i915_gem_object_finish_gpu(struct drm_i915_gem_object *obj) { int ret; - if (!obj->active) + if ((obj->base.read_domains & I915_GEM_GPU_DOMAINS) == 0) return 0; if (obj->base.write_domain & I915_GEM_GPU_DOMAINS) { @@ -3049,7 +3064,13 @@ i915_gem_object_flush_gpu(struct drm_i915_gem_object *obj) return ret; } - return i915_gem_object_wait_rendering(obj); + ret = i915_gem_object_wait_rendering(obj); + if (ret) + return ret; + + /* Ensure that we invalidate the GPU's caches and TLBs. */ + obj->base.read_domains &= ~I915_GEM_GPU_DOMAINS; + return 0; } /** @@ -3271,6 +3292,10 @@ i915_gem_ring_throttle(struct drm_device *dev, struct drm_file *file) if (ret == 0 && atomic_read(&dev_priv->mm.wedged)) ret = -EIO; + } else if (wait_for_atomic(i915_seqno_passed(ring->get_seqno(ring), + seqno) || + atomic_read(&dev_priv->mm.wedged), 3000)) { + ret = -EBUSY; } } @@ -3474,9 +3499,11 @@ i915_gem_busy_ioctl(struct drm_device *dev, void *data, * so emit a request to do so. */ request = kzalloc(sizeof(*request), GFP_KERNEL); - if (request) - ret = i915_add_request(obj->ring, NULL,request); - else + if (request) { + ret = i915_add_request(obj->ring, NULL, request); + if (ret) + kfree(request); + } else ret = -ENOMEM; } @@ -3500,7 +3527,7 @@ int i915_gem_throttle_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv) { - return i915_gem_ring_throttle(dev, file_priv); + return i915_gem_ring_throttle(dev, file_priv); } int @@ -3575,7 +3602,23 @@ struct drm_i915_gem_object *i915_gem_alloc_object(struct drm_device *dev, obj->base.write_domain = I915_GEM_DOMAIN_CPU; obj->base.read_domains = I915_GEM_DOMAIN_CPU; - obj->cache_level = I915_CACHE_NONE; + if (HAS_LLC(dev)) { + /* On some devices, we can have the GPU use the LLC (the CPU + * cache) for about a 10% performance improvement + * compared to uncached. Graphics requests other than + * display scanout are coherent with the CPU in + * accessing this cache. This means in this mode we + * don't need to clflush on the CPU side, and on the + * GPU side we only need to flush internal caches to + * get data visible to the CPU. + * + * However, we maintain the display planes as UC, and so + * need to rebind when first used as such. + */ + obj->cache_level = I915_CACHE_LLC; + } else + obj->cache_level = I915_CACHE_NONE; + obj->base.driver_private = NULL; obj->fence_reg = I915_FENCE_REG_NONE; INIT_LIST_HEAD(&obj->mm_list); @@ -3613,7 +3656,7 @@ static void i915_gem_free_object_tail(struct drm_i915_gem_object *obj) trace_i915_gem_object_destroy(obj); if (obj->base.map_list.map) - i915_gem_free_mmap_offset(obj); + drm_gem_free_mmap_offset(&obj->base); drm_gem_object_release(&obj->base); i915_gem_info_remove_obj(dev_priv, obj->base.size); @@ -3650,7 +3693,7 @@ i915_gem_idle(struct drm_device *dev) return 0; } - ret = i915_gpu_idle(dev); + ret = i915_gpu_idle(dev, true); if (ret) { mutex_unlock(&dev->struct_mutex); return ret; @@ -3685,12 +3728,71 @@ i915_gem_idle(struct drm_device *dev) return 0; } +void i915_gem_init_swizzling(struct drm_device *dev) +{ + drm_i915_private_t *dev_priv = dev->dev_private; + + if (INTEL_INFO(dev)->gen < 5 || + dev_priv->mm.bit_6_swizzle_x == I915_BIT_6_SWIZZLE_NONE) + return; + + I915_WRITE(DISP_ARB_CTL, I915_READ(DISP_ARB_CTL) | + DISP_TILE_SURFACE_SWIZZLING); + + if (IS_GEN5(dev)) + return; + + I915_WRITE(TILECTL, I915_READ(TILECTL) | TILECTL_SWZCTL); + if (IS_GEN6(dev)) + I915_WRITE(ARB_MODE, ARB_MODE_ENABLE(ARB_MODE_SWIZZLE_SNB)); + else + I915_WRITE(ARB_MODE, ARB_MODE_ENABLE(ARB_MODE_SWIZZLE_IVB)); +} + +void i915_gem_init_ppgtt(struct drm_device *dev) +{ + drm_i915_private_t *dev_priv = dev->dev_private; + uint32_t pd_offset; + struct intel_ring_buffer *ring; + int i; + + if (!dev_priv->mm.aliasing_ppgtt) + return; + + pd_offset = dev_priv->mm.aliasing_ppgtt->pd_offset; + pd_offset /= 64; /* in cachelines, */ + pd_offset <<= 16; + + if (INTEL_INFO(dev)->gen == 6) { + uint32_t ecochk = I915_READ(GAM_ECOCHK); + I915_WRITE(GAM_ECOCHK, ecochk | ECOCHK_SNB_BIT | + ECOCHK_PPGTT_CACHE64B); + I915_WRITE(GFX_MODE, GFX_MODE_ENABLE(GFX_PPGTT_ENABLE)); + } else if (INTEL_INFO(dev)->gen >= 7) { + I915_WRITE(GAM_ECOCHK, ECOCHK_PPGTT_CACHE64B); + /* GFX_MODE is per-ring on gen7+ */ + } + + for (i = 0; i < I915_NUM_RINGS; i++) { + ring = &dev_priv->ring[i]; + + if (INTEL_INFO(dev)->gen >= 7) + I915_WRITE(RING_MODE_GEN7(ring), + GFX_MODE_ENABLE(GFX_PPGTT_ENABLE)); + + I915_WRITE(RING_PP_DIR_DCLV(ring), PP_DIR_DCLV_2G); + I915_WRITE(RING_PP_DIR_BASE(ring), pd_offset); + } +} + int -i915_gem_init_ringbuffer(struct drm_device *dev) +i915_gem_init_hw(struct drm_device *dev) { drm_i915_private_t *dev_priv = dev->dev_private; int ret; + i915_gem_init_swizzling(dev); + ret = intel_init_render_ring_buffer(dev); if (ret) return ret; @@ -3709,6 +3811,8 @@ i915_gem_init_ringbuffer(struct drm_device *dev) dev_priv->next_seqno = 1; + i915_gem_init_ppgtt(dev); + return 0; cleanup_bsd_ring: @@ -3746,7 +3850,7 @@ i915_gem_entervt_ioctl(struct drm_device *dev, void *data, mutex_lock(&dev->struct_mutex); dev_priv->mm.suspended = 0; - ret = i915_gem_init_ringbuffer(dev); + ret = i915_gem_init_hw(dev); if (ret != 0) { mutex_unlock(&dev->struct_mutex); return ret; @@ -3823,7 +3927,7 @@ i915_gem_load(struct drm_device *dev) INIT_LIST_HEAD(&dev_priv->mm.gtt_list); for (i = 0; i < I915_NUM_RINGS; i++) init_ring_lists(&dev_priv->ring[i]); - for (i = 0; i < 16; i++) + for (i = 0; i < I915_MAX_NUM_FENCES; i++) INIT_LIST_HEAD(&dev_priv->fence_regs[i].lru_list); INIT_DELAYED_WORK(&dev_priv->mm.retire_work, i915_gem_retire_work_handler); @@ -4141,7 +4245,7 @@ rescan: * This has a dramatic impact to reduce the number of * OOM-killer events whilst running the GPU aggressively. */ - if (i915_gpu_idle(dev) == 0) + if (i915_gpu_idle(dev, true) == 0) goto rescan; } mutex_unlock(&dev->struct_mutex); |