Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

1 files changed, 454 insertions, 0 deletions

diff --git a/kernel/drivers/gpu/drm/qxl/qxl_ioctl.c b/kernel/drivers/gpu/drm/qxl/qxl_ioctl.c
new file mode 100644
index 000000000..b110883f8
--- /dev/null
+++ b/kernel/drivers/gpu/drm/qxl/qxl_ioctl.c
@@ -0,0 +1,454 @@
+/*
+ * Copyright 2013 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: Dave Airlie
+ *          Alon Levy
+ */
+
+#include "qxl_drv.h"
+#include "qxl_object.h"
+
+/*
+ * TODO: allocating a new gem(in qxl_bo) for each request.
+ * This is wasteful since bo's are page aligned.
+ */
+static int qxl_alloc_ioctl(struct drm_device *dev, void *data,
+			   struct drm_file *file_priv)
+{
+	struct qxl_device *qdev = dev->dev_private;
+	struct drm_qxl_alloc *qxl_alloc = data;
+	int ret;
+	struct qxl_bo *qobj;
+	uint32_t handle;
+	u32 domain = QXL_GEM_DOMAIN_VRAM;
+
+	if (qxl_alloc->size == 0) {
+		DRM_ERROR("invalid size %d\n", qxl_alloc->size);
+		return -EINVAL;
+	}
+	ret = qxl_gem_object_create_with_handle(qdev, file_priv,
+						domain,
+						qxl_alloc->size,
+						NULL,
+						&qobj, &handle);
+	if (ret) {
+		DRM_ERROR("%s: failed to create gem ret=%d\n",
+			  __func__, ret);
+		return -ENOMEM;
+	}
+	qxl_alloc->handle = handle;
+	return 0;
+}
+
+static int qxl_map_ioctl(struct drm_device *dev, void *data,
+			 struct drm_file *file_priv)
+{
+	struct qxl_device *qdev = dev->dev_private;
+	struct drm_qxl_map *qxl_map = data;
+
+	return qxl_mode_dumb_mmap(file_priv, qdev->ddev, qxl_map->handle,
+				  &qxl_map->offset);
+}
+
+struct qxl_reloc_info {
+	int type;
+	struct qxl_bo *dst_bo;
+	uint32_t dst_offset;
+	struct qxl_bo *src_bo;
+	int src_offset;
+};
+
+/*
+ * dst must be validated, i.e. whole bo on vram/surfacesram (right now all bo's
+ * are on vram).
+ * *(dst + dst_off) = qxl_bo_physical_address(src, src_off)
+ */
+static void
+apply_reloc(struct qxl_device *qdev, struct qxl_reloc_info *info)
+{
+	void *reloc_page;
+	reloc_page = qxl_bo_kmap_atomic_page(qdev, info->dst_bo, info->dst_offset & PAGE_MASK);
+	*(uint64_t *)(reloc_page + (info->dst_offset & ~PAGE_MASK)) = qxl_bo_physical_address(qdev,
+											      info->src_bo,
+											      info->src_offset);
+	qxl_bo_kunmap_atomic_page(qdev, info->dst_bo, reloc_page);
+}
+
+static void
+apply_surf_reloc(struct qxl_device *qdev, struct qxl_reloc_info *info)
+{
+	uint32_t id = 0;
+	void *reloc_page;
+
+	if (info->src_bo && !info->src_bo->is_primary)
+		id = info->src_bo->surface_id;
+
+	reloc_page = qxl_bo_kmap_atomic_page(qdev, info->dst_bo, info->dst_offset & PAGE_MASK);
+	*(uint32_t *)(reloc_page + (info->dst_offset & ~PAGE_MASK)) = id;
+	qxl_bo_kunmap_atomic_page(qdev, info->dst_bo, reloc_page);
+}
+
+/* return holding the reference to this object */
+static struct qxl_bo *qxlhw_handle_to_bo(struct qxl_device *qdev,
+					 struct drm_file *file_priv, uint64_t handle,
+					 struct qxl_release *release)
+{
+	struct drm_gem_object *gobj;
+	struct qxl_bo *qobj;
+	int ret;
+
+	gobj = drm_gem_object_lookup(qdev->ddev, file_priv, handle);
+	if (!gobj)
+		return NULL;
+
+	qobj = gem_to_qxl_bo(gobj);
+
+	ret = qxl_release_list_add(release, qobj);
+	if (ret)
+		return NULL;
+
+	return qobj;
+}
+
+/*
+ * Usage of execbuffer:
+ * Relocations need to take into account the full QXLDrawable size.
+ * However, the command as passed from user space must *not* contain the initial
+ * QXLReleaseInfo struct (first XXX bytes)
+ */
+static int qxl_process_single_command(struct qxl_device *qdev,
+				      struct drm_qxl_command *cmd,
+				      struct drm_file *file_priv)
+{
+	struct qxl_reloc_info *reloc_info;
+	int release_type;
+	struct qxl_release *release;
+	struct qxl_bo *cmd_bo;
+	void *fb_cmd;
+	int i, j, ret, num_relocs;
+	int unwritten;
+
+	switch (cmd->type) {
+	case QXL_CMD_DRAW:
+		release_type = QXL_RELEASE_DRAWABLE;
+		break;
+	case QXL_CMD_SURFACE:
+	case QXL_CMD_CURSOR:
+	default:
+		DRM_DEBUG("Only draw commands in execbuffers\n");
+		return -EINVAL;
+		break;
+	}
+
+	if (cmd->command_size > PAGE_SIZE - sizeof(union qxl_release_info))
+		return -EINVAL;
+
+	if (!access_ok(VERIFY_READ,
+		       (void *)(unsigned long)cmd->command,
+		       cmd->command_size))
+		return -EFAULT;
+
+	reloc_info = kmalloc(sizeof(struct qxl_reloc_info) * cmd->relocs_num, GFP_KERNEL);
+	if (!reloc_info)
+		return -ENOMEM;
+
+	ret = qxl_alloc_release_reserved(qdev,
+					 sizeof(union qxl_release_info) +
+					 cmd->command_size,
+					 release_type,
+					 &release,
+					 &cmd_bo);
+	if (ret)
+		goto out_free_reloc;
+
+	/* TODO copy slow path code from i915 */
+	fb_cmd = qxl_bo_kmap_atomic_page(qdev, cmd_bo, (release->release_offset & PAGE_SIZE));
+	unwritten = __copy_from_user_inatomic_nocache(fb_cmd + sizeof(union qxl_release_info) + (release->release_offset & ~PAGE_SIZE), (void *)(unsigned long)cmd->command, cmd->command_size);
+
+	{
+		struct qxl_drawable *draw = fb_cmd;
+		draw->mm_time = qdev->rom->mm_clock;
+	}
+
+	qxl_bo_kunmap_atomic_page(qdev, cmd_bo, fb_cmd);
+	if (unwritten) {
+		DRM_ERROR("got unwritten %d\n", unwritten);
+		ret = -EFAULT;
+		goto out_free_release;
+	}
+
+	/* fill out reloc info structs */
+	num_relocs = 0;
+	for (i = 0; i < cmd->relocs_num; ++i) {
+		struct drm_qxl_reloc reloc;
+
+		if (copy_from_user(&reloc,
+				       &((struct drm_qxl_reloc *)(uintptr_t)cmd->relocs)[i],
+				       sizeof(reloc))) {
+			ret = -EFAULT;
+			goto out_free_bos;
+		}
+
+		/* add the bos to the list of bos to validate -
+		   need to validate first then process relocs? */
+		if (reloc.reloc_type != QXL_RELOC_TYPE_BO && reloc.reloc_type != QXL_RELOC_TYPE_SURF) {
+			DRM_DEBUG("unknown reloc type %d\n", reloc_info[i].type);
+
+			ret = -EINVAL;
+			goto out_free_bos;
+		}
+		reloc_info[i].type = reloc.reloc_type;
+
+		if (reloc.dst_handle) {
+			reloc_info[i].dst_bo = qxlhw_handle_to_bo(qdev, file_priv,
+								  reloc.dst_handle, release);
+			if (!reloc_info[i].dst_bo) {
+				ret = -EINVAL;
+				reloc_info[i].src_bo = NULL;
+				goto out_free_bos;
+			}
+			reloc_info[i].dst_offset = reloc.dst_offset;
+		} else {
+			reloc_info[i].dst_bo = cmd_bo;
+			reloc_info[i].dst_offset = reloc.dst_offset + release->release_offset;
+		}
+		num_relocs++;
+
+		/* reserve and validate the reloc dst bo */
+		if (reloc.reloc_type == QXL_RELOC_TYPE_BO || reloc.src_handle > 0) {
+			reloc_info[i].src_bo =
+				qxlhw_handle_to_bo(qdev, file_priv,
+						   reloc.src_handle, release);
+			if (!reloc_info[i].src_bo) {
+				if (reloc_info[i].dst_bo != cmd_bo)
+					drm_gem_object_unreference_unlocked(&reloc_info[i].dst_bo->gem_base);
+				ret = -EINVAL;
+				goto out_free_bos;
+			}
+			reloc_info[i].src_offset = reloc.src_offset;
+		} else {
+			reloc_info[i].src_bo = NULL;
+			reloc_info[i].src_offset = 0;
+		}
+	}
+
+	/* validate all buffers */
+	ret = qxl_release_reserve_list(release, false);
+	if (ret)
+		goto out_free_bos;
+
+	for (i = 0; i < cmd->relocs_num; ++i) {
+		if (reloc_info[i].type == QXL_RELOC_TYPE_BO)
+			apply_reloc(qdev, &reloc_info[i]);
+		else if (reloc_info[i].type == QXL_RELOC_TYPE_SURF)
+			apply_surf_reloc(qdev, &reloc_info[i]);
+	}
+
+	ret = qxl_push_command_ring_release(qdev, release, cmd->type, true);
+	if (ret)
+		qxl_release_backoff_reserve_list(release);
+	else
+		qxl_release_fence_buffer_objects(release);
+
+out_free_bos:
+	for (j = 0; j < num_relocs; j++) {
+		if (reloc_info[j].dst_bo != cmd_bo)
+			drm_gem_object_unreference_unlocked(&reloc_info[j].dst_bo->gem_base);
+		if (reloc_info[j].src_bo && reloc_info[j].src_bo != cmd_bo)
+			drm_gem_object_unreference_unlocked(&reloc_info[j].src_bo->gem_base);
+	}
+out_free_release:
+	if (ret)
+		qxl_release_free(qdev, release);
+out_free_reloc:
+	kfree(reloc_info);
+	return ret;
+}
+
+static int qxl_execbuffer_ioctl(struct drm_device *dev, void *data,
+				struct drm_file *file_priv)
+{
+	struct qxl_device *qdev = dev->dev_private;
+	struct drm_qxl_execbuffer *execbuffer = data;
+	struct drm_qxl_command user_cmd;
+	int cmd_num;
+	int ret;
+
+	for (cmd_num = 0; cmd_num < execbuffer->commands_num; ++cmd_num) {
+
+		struct drm_qxl_command *commands =
+			(struct drm_qxl_command *)(uintptr_t)execbuffer->commands;
+
+		if (copy_from_user(&user_cmd, &commands[cmd_num],
+				       sizeof(user_cmd)))
+			return -EFAULT;
+
+		ret = qxl_process_single_command(qdev, &user_cmd, file_priv);
+		if (ret)
+			return ret;
+	}
+	return 0;
+}
+
+static int qxl_update_area_ioctl(struct drm_device *dev, void *data,
+				 struct drm_file *file)
+{
+	struct qxl_device *qdev = dev->dev_private;
+	struct drm_qxl_update_area *update_area = data;
+	struct qxl_rect area = {.left = update_area->left,
+				.top = update_area->top,
+				.right = update_area->right,
+				.bottom = update_area->bottom};
+	int ret;
+	struct drm_gem_object *gobj = NULL;
+	struct qxl_bo *qobj = NULL;
+
+	if (update_area->left >= update_area->right ||
+	    update_area->top >= update_area->bottom)
+		return -EINVAL;
+
+	gobj = drm_gem_object_lookup(dev, file, update_area->handle);
+	if (gobj == NULL)
+		return -ENOENT;
+
+	qobj = gem_to_qxl_bo(gobj);
+
+	ret = qxl_bo_reserve(qobj, false);
+	if (ret)
+		goto out;
+
+	if (!qobj->pin_count) {
+		qxl_ttm_placement_from_domain(qobj, qobj->type, false);
+		ret = ttm_bo_validate(&qobj->tbo, &qobj->placement,
+				      true, false);
+		if (unlikely(ret))
+			goto out;
+	}
+
+	ret = qxl_bo_check_id(qdev, qobj);
+	if (ret)
+		goto out2;
+	if (!qobj->surface_id)
+		DRM_ERROR("got update area for surface with no id %d\n", update_area->handle);
+	ret = qxl_io_update_area(qdev, qobj, &area);
+
+out2:
+	qxl_bo_unreserve(qobj);
+
+out:
+	drm_gem_object_unreference_unlocked(gobj);
+	return ret;
+}
+
+static int qxl_getparam_ioctl(struct drm_device *dev, void *data,
+		       struct drm_file *file_priv)
+{
+	struct qxl_device *qdev = dev->dev_private;
+	struct drm_qxl_getparam *param = data;
+
+	switch (param->param) {
+	case QXL_PARAM_NUM_SURFACES:
+		param->value = qdev->rom->n_surfaces;
+		break;
+	case QXL_PARAM_MAX_RELOCS:
+		param->value = QXL_MAX_RES;
+		break;
+	default:
+		return -EINVAL;
+	}
+	return 0;
+}
+
+static int qxl_clientcap_ioctl(struct drm_device *dev, void *data,
+				  struct drm_file *file_priv)
+{
+	struct qxl_device *qdev = dev->dev_private;
+	struct drm_qxl_clientcap *param = data;
+	int byte, idx;
+
+	byte = param->index / 8;
+	idx = param->index % 8;
+
+	if (qdev->pdev->revision < 4)
+		return -ENOSYS;
+
+	if (byte >= 58)
+		return -ENOSYS;
+
+	if (qdev->rom->client_capabilities[byte] & (1 << idx))
+		return 0;
+	return -ENOSYS;
+}
+
+static int qxl_alloc_surf_ioctl(struct drm_device *dev, void *data,
+				struct drm_file *file)
+{
+	struct qxl_device *qdev = dev->dev_private;
+	struct drm_qxl_alloc_surf *param = data;
+	struct qxl_bo *qobj;
+	int handle;
+	int ret;
+	int size, actual_stride;
+	struct qxl_surface surf;
+
+	/* work out size allocate bo with handle */
+	actual_stride = param->stride < 0 ? -param->stride : param->stride;
+	size = actual_stride * param->height + actual_stride;
+
+	surf.format = param->format;
+	surf.width = param->width;
+	surf.height = param->height;
+	surf.stride = param->stride;
+	surf.data = 0;
+
+	ret = qxl_gem_object_create_with_handle(qdev, file,
+						QXL_GEM_DOMAIN_SURFACE,
+						size,
+						&surf,
+						&qobj, &handle);
+	if (ret) {
+		DRM_ERROR("%s: failed to create gem ret=%d\n",
+			  __func__, ret);
+		return -ENOMEM;
+	} else
+		param->handle = handle;
+	return ret;
+}
+
+const struct drm_ioctl_desc qxl_ioctls[] = {
+	DRM_IOCTL_DEF_DRV(QXL_ALLOC, qxl_alloc_ioctl, DRM_AUTH|DRM_UNLOCKED),
+
+	DRM_IOCTL_DEF_DRV(QXL_MAP, qxl_map_ioctl, DRM_AUTH|DRM_UNLOCKED),
+
+	DRM_IOCTL_DEF_DRV(QXL_EXECBUFFER, qxl_execbuffer_ioctl,
+							DRM_AUTH|DRM_UNLOCKED),
+	DRM_IOCTL_DEF_DRV(QXL_UPDATE_AREA, qxl_update_area_ioctl,
+							DRM_AUTH|DRM_UNLOCKED),
+	DRM_IOCTL_DEF_DRV(QXL_GETPARAM, qxl_getparam_ioctl,
+							DRM_AUTH|DRM_UNLOCKED),
+	DRM_IOCTL_DEF_DRV(QXL_CLIENTCAP, qxl_clientcap_ioctl,
+							DRM_AUTH|DRM_UNLOCKED),
+
+	DRM_IOCTL_DEF_DRV(QXL_ALLOC_SURF, qxl_alloc_surf_ioctl,
+			  DRM_AUTH|DRM_UNLOCKED),
+};
+
+int qxl_max_ioctls = ARRAY_SIZE(qxl_ioctls);