Signed-off-by: Qiang Yu yuq825@gmail.com --- drivers/gpu/drm/lima/lima_ttm.c | 409 ++++++++++++++++++++++++++++++++ drivers/gpu/drm/lima/lima_ttm.h | 44 ++++ 2 files changed, 453 insertions(+) create mode 100644 drivers/gpu/drm/lima/lima_ttm.c create mode 100644 drivers/gpu/drm/lima/lima_ttm.h
diff --git a/drivers/gpu/drm/lima/lima_ttm.c b/drivers/gpu/drm/lima/lima_ttm.c new file mode 100644 index 000000000000..5325f3f48ae7 --- /dev/null +++ b/drivers/gpu/drm/lima/lima_ttm.c @@ -0,0 +1,409 @@ +/* + * Copyright (C) 2017-2018 Lima Project + * + * 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. + */ + +#include <linux/mm.h> +#include <drm/ttm/ttm_page_alloc.h> + +#include "lima_drv.h" +#include "lima_device.h" +#include "lima_object.h" + + +static int lima_ttm_mem_global_init(struct drm_global_reference *ref) +{ + return ttm_mem_global_init(ref->object); +} + +static void lima_ttm_mem_global_release(struct drm_global_reference *ref) +{ + ttm_mem_global_release(ref->object); +} + +static int lima_ttm_global_init(struct lima_device *dev) +{ + struct drm_global_reference *global_ref; + int err; + + dev->mman.mem_global_referenced = false; + global_ref = &dev->mman.mem_global_ref; + global_ref->global_type = DRM_GLOBAL_TTM_MEM; + global_ref->size = sizeof(struct ttm_mem_global); + global_ref->init = &lima_ttm_mem_global_init; + global_ref->release = &lima_ttm_mem_global_release; + + err = drm_global_item_ref(global_ref); + if (err != 0) { + dev_err(dev->dev, "Failed setting up TTM memory accounting " + "subsystem.\n"); + return err; + } + + dev->mman.bo_global_ref.mem_glob = + dev->mman.mem_global_ref.object; + global_ref = &dev->mman.bo_global_ref.ref; + global_ref->global_type = DRM_GLOBAL_TTM_BO; + global_ref->size = sizeof(struct ttm_bo_global); + global_ref->init = &ttm_bo_global_init; + global_ref->release = &ttm_bo_global_release; + err = drm_global_item_ref(global_ref); + if (err != 0) { + dev_err(dev->dev, "Failed setting up TTM BO subsystem.\n"); + drm_global_item_unref(&dev->mman.mem_global_ref); + return err; + } + + dev->mman.mem_global_referenced = true; + return 0; +} + +static void lima_ttm_global_fini(struct lima_device *dev) +{ + if (dev->mman.mem_global_referenced) { + drm_global_item_unref(&dev->mman.bo_global_ref.ref); + drm_global_item_unref(&dev->mman.mem_global_ref); + dev->mman.mem_global_referenced = false; + } +} + +struct lima_tt_mgr { + spinlock_t lock; + unsigned long available; +}; + +static int lima_ttm_bo_man_init(struct ttm_mem_type_manager *man, + unsigned long p_size) +{ + struct lima_tt_mgr *mgr; + + mgr = kmalloc(sizeof(*mgr), GFP_KERNEL); + if (!mgr) + return -ENOMEM; + + spin_lock_init(&mgr->lock); + mgr->available = p_size; + man->priv = mgr; + return 0; +} + +static int lima_ttm_bo_man_takedown(struct ttm_mem_type_manager *man) +{ + struct lima_tt_mgr *mgr = man->priv; + + kfree(mgr); + man->priv = NULL; + return 0; +} + +static int lima_ttm_bo_man_get_node(struct ttm_mem_type_manager *man, + struct ttm_buffer_object *bo, + const struct ttm_place *place, + struct ttm_mem_reg *mem) +{ + struct lima_tt_mgr *mgr = man->priv; + + /* don't exceed the mem limit */ + spin_lock(&mgr->lock); + if (mgr->available < mem->num_pages) { + spin_unlock(&mgr->lock); + return 0; + } + mgr->available -= mem->num_pages; + spin_unlock(&mgr->lock); + + /* just fake a non-null pointer to tell caller success */ + mem->mm_node = (void *)1; + return 0; +} + +static void lima_ttm_bo_man_put_node(struct ttm_mem_type_manager *man, + struct ttm_mem_reg *mem) +{ + struct lima_tt_mgr *mgr = man->priv; + + spin_lock(&mgr->lock); + mgr->available += mem->num_pages; + spin_unlock(&mgr->lock); + + mem->mm_node = NULL; +} + +static void lima_ttm_bo_man_debug(struct ttm_mem_type_manager *man, + struct drm_printer *printer) +{ +} + +static const struct ttm_mem_type_manager_func lima_bo_manager_func = { + .init = lima_ttm_bo_man_init, + .takedown = lima_ttm_bo_man_takedown, + .get_node = lima_ttm_bo_man_get_node, + .put_node = lima_ttm_bo_man_put_node, + .debug = lima_ttm_bo_man_debug +}; + +static int lima_init_mem_type(struct ttm_bo_device *bdev, uint32_t type, + struct ttm_mem_type_manager *man) +{ + struct lima_device *dev = ttm_to_lima_dev(bdev); + + switch (type) { + case TTM_PL_SYSTEM: + /* System memory */ + man->flags = TTM_MEMTYPE_FLAG_MAPPABLE; + man->available_caching = TTM_PL_MASK_CACHING; + man->default_caching = TTM_PL_FLAG_CACHED; + break; + case TTM_PL_TT: + man->func = &lima_bo_manager_func; + man->flags = TTM_MEMTYPE_FLAG_MAPPABLE; + man->available_caching = TTM_PL_MASK_CACHING; + man->default_caching = TTM_PL_FLAG_CACHED; + break; + default: + dev_err(dev->dev, "Unsupported memory type %u\n", + (unsigned int)type); + return -EINVAL; + } + return 0; +} + +static int lima_ttm_backend_bind(struct ttm_tt *ttm, + struct ttm_mem_reg *bo_mem) +{ + return 0; +} + +static int lima_ttm_backend_unbind(struct ttm_tt *ttm) +{ + return 0; +} + +static void lima_ttm_backend_destroy(struct ttm_tt *ttm) +{ + struct lima_ttm_tt *tt = (void *)ttm; + + ttm_dma_tt_fini(&tt->ttm); + kfree(tt); +} + +static struct ttm_backend_func lima_ttm_backend_func = { + .bind = &lima_ttm_backend_bind, + .unbind = &lima_ttm_backend_unbind, + .destroy = &lima_ttm_backend_destroy, +}; + +static struct ttm_tt *lima_ttm_tt_create(struct ttm_buffer_object *bo, + uint32_t page_flags) +{ + struct lima_ttm_tt *tt; + + tt = kzalloc(sizeof(struct lima_ttm_tt), GFP_KERNEL); + if (tt == NULL) + return NULL; + + tt->ttm.ttm.func = &lima_ttm_backend_func; + + if (ttm_sg_tt_init(&tt->ttm, bo, page_flags)) { + kfree(tt); + return NULL; + } + + return &tt->ttm.ttm; +} + +static int lima_ttm_tt_populate(struct ttm_tt *ttm, + struct ttm_operation_ctx *ctx) +{ + struct lima_device *dev = ttm_to_lima_dev(ttm->bdev); + struct lima_ttm_tt *tt = (void *)ttm; + bool slave = !!(ttm->page_flags & TTM_PAGE_FLAG_SG); + + if (slave) { + drm_prime_sg_to_page_addr_arrays(ttm->sg, ttm->pages, + tt->ttm.dma_address, + ttm->num_pages); + ttm->state = tt_unbound; + return 0; + } + + return ttm_populate_and_map_pages(dev->dev, &tt->ttm, ctx); +} + +static void lima_ttm_tt_unpopulate(struct ttm_tt *ttm) +{ + struct lima_device *dev = ttm_to_lima_dev(ttm->bdev); + struct lima_ttm_tt *tt = (void *)ttm; + bool slave = !!(ttm->page_flags & TTM_PAGE_FLAG_SG); + + if (slave) + return; + + ttm_unmap_and_unpopulate_pages(dev->dev, &tt->ttm); +} + +static int lima_invalidate_caches(struct ttm_bo_device *bdev, + uint32_t flags) +{ + struct lima_device *dev = ttm_to_lima_dev(bdev); + + dev_err(dev->dev, "%s not implemented\n", __FUNCTION__); + return 0; +} + +static void lima_evict_flags(struct ttm_buffer_object *tbo, + struct ttm_placement *placement) +{ + struct lima_bo *bo = ttm_to_lima_bo(tbo); + struct lima_device *dev = to_lima_dev(bo->gem.dev); + + dev_err(dev->dev, "%s not implemented\n", __FUNCTION__); +} + +static int lima_verify_access(struct ttm_buffer_object *tbo, + struct file *filp) +{ + struct lima_bo *bo = ttm_to_lima_bo(tbo); + + return drm_vma_node_verify_access(&bo->gem.vma_node, + filp->private_data); +} + +static int lima_ttm_io_mem_reserve(struct ttm_bo_device *bdev, + struct ttm_mem_reg *mem) +{ + struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type]; + + mem->bus.addr = NULL; + mem->bus.offset = 0; + mem->bus.size = mem->num_pages << PAGE_SHIFT; + mem->bus.base = 0; + mem->bus.is_iomem = false; + + if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE)) + return -EINVAL; + + switch (mem->mem_type) { + case TTM_PL_SYSTEM: + case TTM_PL_TT: + return 0; + default: + return -EINVAL; + } + return 0; +} + +static void lima_ttm_io_mem_free(struct ttm_bo_device *bdev, + struct ttm_mem_reg *mem) +{ + +} + +static void lima_bo_move_notify(struct ttm_buffer_object *tbo, bool evict, + struct ttm_mem_reg *new_mem) +{ + struct lima_bo *bo = ttm_to_lima_bo(tbo); + struct lima_device *dev = to_lima_dev(bo->gem.dev); + + if (evict) + dev_err(dev->dev, "%s not implemented\n", __FUNCTION__); +} + +static void lima_bo_swap_notify(struct ttm_buffer_object *tbo) +{ + struct lima_bo *bo = ttm_to_lima_bo(tbo); + struct lima_device *dev = to_lima_dev(bo->gem.dev); + + dev_err(dev->dev, "%s not implemented\n", __FUNCTION__); +} + +static struct ttm_bo_driver lima_bo_driver = { + .ttm_tt_create = lima_ttm_tt_create, + .ttm_tt_populate = lima_ttm_tt_populate, + .ttm_tt_unpopulate = lima_ttm_tt_unpopulate, + .invalidate_caches = lima_invalidate_caches, + .init_mem_type = lima_init_mem_type, + .eviction_valuable = ttm_bo_eviction_valuable, + .evict_flags = lima_evict_flags, + .verify_access = lima_verify_access, + .io_mem_reserve = lima_ttm_io_mem_reserve, + .io_mem_free = lima_ttm_io_mem_free, + .move_notify = lima_bo_move_notify, + .swap_notify = lima_bo_swap_notify, +}; + +int lima_ttm_init(struct lima_device *dev) +{ + int err; + bool need_dma32; + u64 gtt_size; + + err = lima_ttm_global_init(dev); + if (err) + return err; + +#if defined(CONFIG_ARM) && !defined(CONFIG_ARM_LPAE) + need_dma32 = false; +#else + need_dma32 = true; +#endif + + err = ttm_bo_device_init(&dev->mman.bdev, + dev->mman.bo_global_ref.ref.object, + &lima_bo_driver, + dev->ddev->anon_inode->i_mapping, + DRM_FILE_PAGE_OFFSET, + need_dma32); + if (err) { + dev_err(dev->dev, "failed initializing buffer object " + "driver(%d).\n", err); + goto err_out0; + } + + if (lima_max_mem < 0) { + struct sysinfo si; + si_meminfo(&si); + /* TODO: better to have lower 32 mem size */ + gtt_size = min(((u64)si.totalram * si.mem_unit * 3/4), + 0x100000000ULL); + } + else + gtt_size = (u64)lima_max_mem << 20; + + err = ttm_bo_init_mm(&dev->mman.bdev, TTM_PL_TT, gtt_size >> PAGE_SHIFT); + if (err) { + dev_err(dev->dev, "Failed initializing GTT heap.\n"); + goto err_out1; + } + return 0; + +err_out1: + ttm_bo_device_release(&dev->mman.bdev); +err_out0: + lima_ttm_global_fini(dev); + return err; +} + +void lima_ttm_fini(struct lima_device *dev) +{ + ttm_bo_device_release(&dev->mman.bdev); + lima_ttm_global_fini(dev); + dev_info(dev->dev, "ttm finalized\n"); +} diff --git a/drivers/gpu/drm/lima/lima_ttm.h b/drivers/gpu/drm/lima/lima_ttm.h new file mode 100644 index 000000000000..1d36d06a47a3 --- /dev/null +++ b/drivers/gpu/drm/lima/lima_ttm.h @@ -0,0 +1,44 @@ +/* + * Copyright (C) 2017-2018 Lima Project + * + * 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. + */ +#ifndef __LIMA_TTM_H__ +#define __LIMA_TTM_H__ + +#include <drm/ttm/ttm_bo_driver.h> + +struct lima_mman { + struct ttm_bo_global_ref bo_global_ref; + struct drm_global_reference mem_global_ref; + struct ttm_bo_device bdev; + bool mem_global_referenced; +}; + +struct lima_ttm_tt { + struct ttm_dma_tt ttm; +}; + +struct lima_device; +struct lima_bo; + +int lima_ttm_init(struct lima_device *dev); +void lima_ttm_fini(struct lima_device *dev); + +#endif