1 files changed, 246 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/instmem/base.c b/drivers/gpu/drm/nouveau/nvkm/subdev/instmem/base.c
new file mode 100644
index 000000000..cd8163a52
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/instmem/base.c
@@ -0,0 +1,246 @@
+/*
+ * Copyright 2012 Red Hat Inc.
+ *
+ * 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.
+ *
+ * Authors: Ben Skeggs
+ */
+#include "priv.h"
+
+#include <subdev/bar.h>
+
+/******************************************************************************
+ * instmem object base implementation
+ *****************************************************************************/
+static void
+nvkm_instobj_load(struct nvkm_instobj *iobj)
+{
+	struct nvkm_memory *memory = &iobj->memory;
+	const u64 size = nvkm_memory_size(memory);
+	void __iomem *map;
+	int i;
+
+	if (!(map = nvkm_kmap(memory))) {
+		for (i = 0; i < size; i += 4)
+			nvkm_wo32(memory, i, iobj->suspend[i / 4]);
+	} else {
+		memcpy_toio(map, iobj->suspend, size);
+	}
+	nvkm_done(memory);
+
+	kvfree(iobj->suspend);
+	iobj->suspend = NULL;
+}
+
+static int
+nvkm_instobj_save(struct nvkm_instobj *iobj)
+{
+	struct nvkm_memory *memory = &iobj->memory;
+	const u64 size = nvkm_memory_size(memory);
+	void __iomem *map;
+	int i;
+
+	iobj->suspend = kvmalloc(size, GFP_KERNEL);
+	if (!iobj->suspend)
+		return -ENOMEM;
+
+	if (!(map = nvkm_kmap(memory))) {
+		for (i = 0; i < size; i += 4)
+			iobj->suspend[i / 4] = nvkm_ro32(memory, i);
+	} else {
+		memcpy_fromio(iobj->suspend, map, size);
+	}
+	nvkm_done(memory);
+	return 0;
+}
+
+void
+nvkm_instobj_dtor(struct nvkm_instmem *imem, struct nvkm_instobj *iobj)
+{
+	spin_lock(&imem->lock);
+	list_del(&iobj->head);
+	spin_unlock(&imem->lock);
+}
+
+void
+nvkm_instobj_ctor(const struct nvkm_memory_func *func,
+		  struct nvkm_instmem *imem, struct nvkm_instobj *iobj)
+{
+	nvkm_memory_ctor(func, &iobj->memory);
+	iobj->suspend = NULL;
+	spin_lock(&imem->lock);
+	list_add_tail(&iobj->head, &imem->list);
+	spin_unlock(&imem->lock);
+}
+
+int
+nvkm_instobj_new(struct nvkm_instmem *imem, u32 size, u32 align, bool zero,
+		 struct nvkm_memory **pmemory)
+{
+	struct nvkm_subdev *subdev = &imem->subdev;
+	struct nvkm_memory *memory = NULL;
+	u32 offset;
+	int ret;
+
+	ret = imem->func->memory_new(imem, size, align, zero, &memory);
+	if (ret) {
+		nvkm_error(subdev, "OOM: %08x %08x %d\n", size, align, ret);
+		goto done;
+	}
+
+	nvkm_trace(subdev, "new %08x %08x %d: %010llx %010llx\n", size, align,
+		   zero, nvkm_memory_addr(memory), nvkm_memory_size(memory));
+
+	if (!imem->func->zero && zero) {
+		void __iomem *map = nvkm_kmap(memory);
+		if (unlikely(!map)) {
+			for (offset = 0; offset < size; offset += 4)
+				nvkm_wo32(memory, offset, 0x00000000);
+		} else {
+			memset_io(map, 0x00, size);
+		}
+		nvkm_done(memory);
+	}
+
+done:
+	if (ret)
+		nvkm_memory_unref(&memory);
+	*pmemory = memory;
+	return ret;
+}
+
+/******************************************************************************
+ * instmem subdev base implementation
+ *****************************************************************************/
+
+u32
+nvkm_instmem_rd32(struct nvkm_instmem *imem, u32 addr)
+{
+	return imem->func->rd32(imem, addr);
+}
+
+void
+nvkm_instmem_wr32(struct nvkm_instmem *imem, u32 addr, u32 data)
+{
+	return imem->func->wr32(imem, addr, data);
+}
+
+void
+nvkm_instmem_boot(struct nvkm_instmem *imem)
+{
+	/* Separate bootstrapped objects from normal list, as we need
+	 * to make sure they're accessed with the slowpath on suspend
+	 * and resume.
+	 */
+	struct nvkm_instobj *iobj, *itmp;
+	spin_lock(&imem->lock);
+	list_for_each_entry_safe(iobj, itmp, &imem->list, head) {
+		list_move_tail(&iobj->head, &imem->boot);
+	}
+	spin_unlock(&imem->lock);
+}
+
+static int
+nvkm_instmem_fini(struct nvkm_subdev *subdev, bool suspend)
+{
+	struct nvkm_instmem *imem = nvkm_instmem(subdev);
+	struct nvkm_instobj *iobj;
+
+	if (suspend) {
+		list_for_each_entry(iobj, &imem->list, head) {
+			int ret = nvkm_instobj_save(iobj);
+			if (ret)
+				return ret;
+		}
+
+		nvkm_bar_bar2_fini(subdev->device);
+
+		list_for_each_entry(iobj, &imem->boot, head) {
+			int ret = nvkm_instobj_save(iobj);
+			if (ret)
+				return ret;
+		}
+	}
+
+	if (imem->func->fini)
+		imem->func->fini(imem);
+
+	return 0;
+}
+
+static int
+nvkm_instmem_init(struct nvkm_subdev *subdev)
+{
+	struct nvkm_instmem *imem = nvkm_instmem(subdev);
+	struct nvkm_instobj *iobj;
+
+	list_for_each_entry(iobj, &imem->boot, head) {
+		if (iobj->suspend)
+			nvkm_instobj_load(iobj);
+	}
+
+	nvkm_bar_bar2_init(subdev->device);
+
+	list_for_each_entry(iobj, &imem->list, head) {
+		if (iobj->suspend)
+			nvkm_instobj_load(iobj);
+	}
+
+	return 0;
+}
+
+static int
+nvkm_instmem_oneinit(struct nvkm_subdev *subdev)
+{
+	struct nvkm_instmem *imem = nvkm_instmem(subdev);
+	if (imem->func->oneinit)
+		return imem->func->oneinit(imem);
+	return 0;
+}
+
+static void *
+nvkm_instmem_dtor(struct nvkm_subdev *subdev)
+{
+	struct nvkm_instmem *imem = nvkm_instmem(subdev);
+	void *data = imem;
+	if (imem->func->dtor)
+		data = imem->func->dtor(imem);
+	mutex_destroy(&imem->mutex);
+	return data;
+}
+
+static const struct nvkm_subdev_func
+nvkm_instmem = {
+	.dtor = nvkm_instmem_dtor,
+	.oneinit = nvkm_instmem_oneinit,
+	.init = nvkm_instmem_init,
+	.fini = nvkm_instmem_fini,
+};
+
+void
+nvkm_instmem_ctor(const struct nvkm_instmem_func *func, struct nvkm_device *device,
+		  enum nvkm_subdev_type type, int inst, struct nvkm_instmem *imem)
+{
+	nvkm_subdev_ctor(&nvkm_instmem, device, type, inst, &imem->subdev);
+	imem->func = func;
+	spin_lock_init(&imem->lock);
+	INIT_LIST_HEAD(&imem->list);
+	INIT_LIST_HEAD(&imem->boot);
+	mutex_init(&imem->mutex);
+}