[PATCH RFC 19/24] drm/lima: add buffer object functions

[Qiang Yu <yuq825@gmail.com>]

Signed-off-by: Qiang Yu <yuq825@gmail.com>
---
 drivers/gpu/drm/lima/lima_object.c | 120 +++++++++++++++++++++++++++++
 drivers/gpu/drm/lima/lima_object.h |  87 +++++++++++++++++++++
 2 files changed, 207 insertions(+)
 create mode 100644 drivers/gpu/drm/lima/lima_object.c
 create mode 100644 drivers/gpu/drm/lima/lima_object.h

diff --git a/drivers/gpu/drm/lima/lima_object.c b/drivers/gpu/drm/lima/lima_object.c
new file mode 100644
index 000000000000..5a22b235626b
--- /dev/null
+++ b/drivers/gpu/drm/lima/lima_object.c
@@ -0,0 +1,120 @@
+/*
+ * 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 <drm/drm_prime.h>
+
+#include "lima_object.h"
+
+static void lima_bo_init_placement(struct lima_bo *bo)
+{
+	struct ttm_placement *placement = &bo->placement;
+	struct ttm_place *place = &bo->place;
+
+	place->fpfn = 0;
+	place->lpfn = 0;
+	place->flags = TTM_PL_FLAG_TT | TTM_PL_FLAG_WC;
+
+	/* pin all bo for now */
+	place->flags |= TTM_PL_FLAG_NO_EVICT;
+
+	placement->num_placement = 1;
+	placement->placement = place;
+
+	placement->num_busy_placement = 1;
+	placement->busy_placement = place;
+}
+
+static void lima_bo_destroy(struct ttm_buffer_object *tbo)
+{
+	struct lima_bo *bo = ttm_to_lima_bo(tbo);
+
+	if (bo->gem.import_attach)
+		drm_prime_gem_destroy(&bo->gem, bo->tbo.sg);
+	drm_gem_object_release(&bo->gem);
+	kfree(bo);
+}
+
+struct lima_bo *lima_bo_create(struct lima_device *dev, u64 size,
+			       u32 flags, enum ttm_bo_type type,
+			       struct sg_table *sg,
+			       struct reservation_object *resv)
+{
+	struct lima_bo *bo;
+	struct ttm_mem_type_manager *man;
+	size_t acc_size;
+	int err;
+
+	size = PAGE_ALIGN(size);
+	man = dev->mman.bdev.man + TTM_PL_TT;
+	if (size >= (man->size << PAGE_SHIFT))
+		return ERR_PTR(-ENOMEM);
+
+	acc_size = ttm_bo_dma_acc_size(&dev->mman.bdev, size,
+				       sizeof(struct lima_bo));
+
+	bo = kzalloc(sizeof(*bo), GFP_KERNEL);
+	if (!bo)
+		return ERR_PTR(-ENOMEM);
+
+	drm_gem_private_object_init(dev->ddev, &bo->gem, size);
+
+	INIT_LIST_HEAD(&bo->va);
+
+	bo->tbo.bdev = &dev->mman.bdev;
+
+	lima_bo_init_placement(bo);
+
+	err = ttm_bo_init(&dev->mman.bdev, &bo->tbo, size, type,
+			  &bo->placement, 0, type != ttm_bo_type_kernel,
+			  acc_size, sg, resv, &lima_bo_destroy);
+	if (err)
+		goto err_out;
+
+	return bo;
+
+err_out:
+	kfree(bo);
+	return ERR_PTR(err);
+}
+
+dma_addr_t *lima_bo_get_pages(struct lima_bo *bo)
+{
+	struct lima_ttm_tt *ttm = (void *)bo->tbo.ttm;
+	return ttm->ttm.dma_address;
+}
+
+void *lima_bo_kmap(struct lima_bo *bo)
+{
+	bool is_iomem;
+	void *ret;
+	int err;
+
+	ret = ttm_kmap_obj_virtual(&bo->kmap, &is_iomem);
+	if (ret)
+		return ret;
+
+	err = ttm_bo_kmap(&bo->tbo, 0, bo->tbo.num_pages, &bo->kmap);
+	if (err)
+		return ERR_PTR(err);
+
+	return ttm_kmap_obj_virtual(&bo->kmap, &is_iomem);
+}
diff --git a/drivers/gpu/drm/lima/lima_object.h b/drivers/gpu/drm/lima/lima_object.h
new file mode 100644
index 000000000000..2b8b8fcb9063
--- /dev/null
+++ b/drivers/gpu/drm/lima/lima_object.h
@@ -0,0 +1,87 @@
+/*
+ * 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_OBJECT_H__
+#define __LIMA_OBJECT_H__
+
+#include <drm/drm_gem.h>
+#include <drm/ttm/ttm_placement.h>
+#include <drm/ttm/ttm_bo_api.h>
+
+#include "lima_device.h"
+
+struct lima_bo {
+	struct drm_gem_object gem;
+
+	struct ttm_place place;
+	struct ttm_placement placement;
+	struct ttm_buffer_object tbo;
+	struct ttm_bo_kmap_obj kmap;
+
+	struct list_head va;
+};
+
+static inline struct lima_bo *
+to_lima_bo(struct drm_gem_object *obj)
+{
+	return container_of(obj, struct lima_bo, gem);
+}
+
+static inline struct lima_bo *
+ttm_to_lima_bo(struct ttm_buffer_object *tbo)
+{
+	return container_of(tbo, struct lima_bo, tbo);
+}
+
+static inline int lima_bo_reserve(struct lima_bo *bo, bool intr)
+{
+	struct lima_device *dev = ttm_to_lima_dev(bo->tbo.bdev);
+	int r;
+
+	r = ttm_bo_reserve(&bo->tbo, intr, false, NULL);
+	if (unlikely(r != 0)) {
+		if (r != -ERESTARTSYS)
+			dev_err(dev->dev, "%p reserve failed\n", bo);
+		return r;
+	}
+	return 0;
+}
+
+static inline void lima_bo_unreserve(struct lima_bo *bo)
+{
+	ttm_bo_unreserve(&bo->tbo);
+}
+
+struct lima_bo *lima_bo_create(struct lima_device *dev, u64 size,
+			       u32 flags, enum ttm_bo_type type,
+			       struct sg_table *sg,
+			       struct reservation_object *resv);
+
+static inline void lima_bo_unref(struct lima_bo *bo)
+{
+	struct ttm_buffer_object *tbo = &bo->tbo;
+	ttm_bo_unref(&tbo);
+}
+
+dma_addr_t *lima_bo_get_pages(struct lima_bo *bo);
+void *lima_bo_kmap(struct lima_bo *bo);
+
+#endif
-- 
2.17.0

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